Answers
Answer:
42.3moles
Explanation:
The chemical equation given in this question is as follows:
H2 + O2 → H2O
However, this equation is unbalanced, the balanced chemical equation is as follows:
2H2 + O2 → 2H2O
This equation shows that;
2 moles of hydrogen gas (H2) will produce 2 moles of water (H2O)
Hence, If 42.3 moles of water (H2O) are produced, 42.3 × 2/2
= 42.3moles of hydrogen was reacted.
Related Questions
1.4 1.4.1 Define exothermic reaction. (2) 1.4.2 Referring to the energies absorbed and released, describe why this reaction is considered to be exothermic. Marks will not be awarded for restating the definition. (2) BEST 1.5 ACADEMY 1.5.1 Other than correct orientation of reacting particles, state ONE condition for an effective collision. (1) 1.5.2 Using the collision theory, explain the effect of using a LESS-concentrated sodium hydroxide solution on the rate of its reaction with aluminium. (4) 1.6 How would an increase in pressure (at constant temperature) affect the rate of this reaction? State only INCREASE, DECREASE, or REMAIN THE SAME. (2)
Answers
1.4.1 An exothermic reaction releases energy in the form of heat or light.
1.4.2 An exothermic reaction releases more energy than it absorbs due to the higher potential energy of the reactants compared to the products.
1.5.1 Effective collision requires sufficient energy or activation energy.
1.5.2 Increasing the concentration of sodium hydroxide solution increases the rate of reaction with aluminum due to more frequent effective collisions.
1.6 Increasing the pressure would not affect the rate of the reaction between sodium hydroxide and aluminum.
1.4.1 Exothermic reaction: An exothermic reaction is a chemical reaction that releases energy in the form of heat or light, resulting in an overall decrease in the internal energy of the system.
1.4.2 In an exothermic reaction, the energy released as a result of the reaction is greater than the energy absorbed. This is because the reactants have a higher potential energy compared to the products. The excess energy is released to the surroundings, leading to an overall decrease in the system's internal energy.
1.5.1 One condition for an effective collision is the presence of sufficient energy, often referred to as activation energy. The reacting particles must possess enough energy to overcome the activation energy barrier for successful collision and reaction to occur.
1.5.2 According to collision theory, increasing the concentration of a reactant, such as sodium hydroxide (NaOH) in its reaction with aluminum (Al), would increase the rate of reaction. A higher concentration provides more particles per unit volume, resulting in more frequent collisions and an increased chance of effective collisions.
1.6 An increase in pressure (at constant temperature) would not significantly affect the rate of the reaction between sodium hydroxide and aluminum. The reaction rate is primarily dependent on the concentration of the reactants and the frequency of effective collisions, rather than the pressure. Therefore the rate would remain the same.
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The production of iron and carbon dioxide from iron (III) oxide and carbon monoxide is an exothermic reaction. Determine the amount of heat produced, in kiloJoules, when 3.40 moles iron (III) oxide reacts with excess carbon monoxide when DH = -23.6 kJ
Answers
Answer: 89.4 kJ
Explanation:
The production of iron and carbon dioxide from iron oxide and carbon monoxide is an exothermic reaction. which expression can you use to find how many kilojoules of heat are produced when 3.40 mol Fe₂O₃ reacts with an excess of CO? ΔH = +26.3 kJ The amount of heat produced will be, 89.4 kJ
Hope this helps :D
The production of iron and carbon dioxide from iron oxide and carbon monoxide is an exothermic reaction.
What are exothermic reactions?
Which expression can you use to find how many kilojoules of heat are produced when 3.40 mol Fe₂O₃ reacts with an excess of CO. ΔH = +26.3 kJ The amount of heat produced will be, 89.4 kJ.
Chemical reactions with a negative H are known as exothermic reactions because they generate heat. Exothermic processes include those that include neutralization, the Haber process, thermite, and combustion.
An endothermic reaction is the opposite of an exothermic process. Endothermic reactions generate less heat than they take in from their surroundings. Exergonic and endergonic reactions are subtypes of exothermic and endothermic reactions, respectively.
Therefore, The production of iron and carbon dioxide from iron oxide and carbon monoxide is an exothermic reaction.
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Mass can be changed into energy in a ____ reaction
A)Chemical
B)Nuclear
Answers
Q3. Which of the following
Elements is likely to
form cations?
ง
A. Titanium (T:)
B. Carbon
C. Bromine
(Br)
) (Ar
D. Argon
Answers
Answer:
Titanium
Explanation:
titanium can form 4+ cations
Choosing the best term in science writing means choosing the term with (I)____ It is better to (II) ___ the chosen term rather than sacrifice (III)___Some of the best terms are long and (IV)___be abbreviated.Choices IO the most visual interpretationO the largest number of syllablesO the most precisely correct definitionChoices IIO repeatO VaryO ignoreChoices IIIO short phrasesO correct meaningO vivid imageryChoices IVO can alwaysO can appropriatelyO can never
Answers
Choosing the appropriate phrase for a scientific essay is selecting one that Choosing the preferred course is preferable to making a sacrifice. The best phrases can sometimes be shortened despite their length.
What is meant by visual interpretation?Analyzing satellite and aerial photos visually is called visual interpretation. Digital interpretation is the process of performing interpretation with the use of computer software.Over the course of more than 150 years, the fundamentals of picture interpretation have been developed scientifically. The most fundamental are the factors that affect how we understand images: site/situation/association, height/depth, position, size, shape, shadow, tone/color, texture, and pattern.To interpret what is on the ground, many image attributes, like object features and context, can be used (e.g., land cover and land use). Images from various times allow us to track changes to the Earth's surface and examine them.To learn more about visual interpretation, refer to:
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Define biotechnology. } List two advantages in the use of biotechnology
Answers
Advantages of biotechnology:
Improvement of plants and animal breeds to give a high yield of their products.
Pests and pathogen control in agriculture which will reduce the loss of yield in food crops.
Synthesis of biocatalyst which can be used for enhancing the reactions which can be carried out in vitro or laboratory conditions.
Sewage treatment or water recycling can be done with the help of transgenic microbes which have better efficiency and speed.
Biotechnology is the use of living organisms or other biological systems in the manufacture of drugs or other products or for environmental management, as in waste recycling: includes the use of bioreactors in manufacturing, microorganisms to degrade oil slicks or organic waste, genetically engineered bacteria to produce human hormones, and monoclonal antibodies to identify antigens.
Biotech offers the possibility of improving human health, the environment, and agriculture while creating more sustainable modes of production.
What does Newton’s first law of motion state?
Answers
Answer:
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. ... If that velocity is zero, then the object remains at rest.
Explanation:
Answer:
Before Galileo and Newton, many people thought that objects lost speed because they had a built-in natural tendency to do so. But those people weren't taking into account the multiple forces here on Earth - for example, friction, gravity, and air resistance - that cause objects to change their speed. If we could see the motion of an object in deep interstellar space, we would be able to observe the natural tendencies of an object that is free from any external influence. In deep interstellar space we would observe that if an object had a speed, it would continue to move with that speed until there was some force causing a change in its motion. Likewise, if an object were at rest in interstellar space, it would remain at rest until there was a force causing a change in its motion.
Explanation:
Hope it helped you =)
CuBr2 percent composition
Answers
The percent composition of CuBr₂ is approximately 28.46% of Cu and 71.54% of Br.
To determine the percent composition of CuBr₂ (copper(II) bromide), we need to calculate the mass of each element in the compound and then divide it by the molar mass of the entire compound.
The molar mass of CuBr₂ can be calculated by adding up the atomic masses of copper (Cu) and bromine (Br) in the compound. The atomic masses of Cu and Br are approximately 63.55 g/mol and 79.90 g/mol, respectively.
Molar mass of CuBr₂ = (63.55 g/mol) + 2(79.90 g/mol) = 223.35 g/mol
Now, let's calculate the percent composition of each element in CuBr₂:
Percent composition of copper (Cu):
Mass of Cu = (63.55 g/mol) / 223.35 g/mol × 100% ≈ 28.46%
Percent composition of bromine (Br):
Mass of Br = 2(79.90 g/mol) / 223.35 g/mol × 100% ≈ 71.54%
Therefore, the percent composition of CuBr₂ is approximately:
- Copper (Cu): 28.46%
- Bromine (Br): 71.54%
These values represent the relative mass percentages of copper and bromine in the compound CuBr₂.
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Which of the following is NOT a property of bases? Which of the following is NOT a property of bases? Bases dissolve many metals. Bases turn litmus paper blue. Bases have a slippery feel. Bases have a bitter taste. All of the above are properties of bases.
Answers
Bases dissolve many metals.
What is the Ea for the exothermic reaction on the right A) 268.74 kJ B) -171.08 kJ C) 88.00 kJ D) -259.09 kJ
Answers
Answer:
Option C. 88 KJ
Explanation:
The activation energy (Ea) is the minimum energy that reactant must overcome in order for them to proceed to product.
In an energy profile diagram, the activation energy (Ea) is obtained by calculating the difference between the energy of the activation complex (i.e peak) and the energy of the reactant.
With the above information, we shall determine the activation energy (Ea) of the reaction above as follow:
Activation complex = 268.74 KJ
Energy of reactant = 180.74 KJ
Activation energy (Ea) =?
Activation energy = Activation complex – Energy of reactant
Activation energy = 268.74 – 180.74
Activation energy = 88 KJ
Therefore, the activation energy (Ea) of the reaction is 88 KJ
Answer:
88.00 kJ
Explanation:
How many electrons are in the 6p subshell of Rn?
Answers
In the electrical arrangement, the 6p subshell of the radon element contains 6 electrons.
What is electronic configuration of radon?Radon is the 86th element in the periodic table, with the symbol 'Rn'. Radon is a type of noble gas. Radon contains a total of eighty-six electrons. These electrons are grouped in accordance with the laws of several orbits.The p-orbital can hold up to six electrons. As a result, the following six electrons enter the 2p orbital. The second orbit is now completely filled. As a result, the remaining electrons will go into the third orbit.As a result, the entire electron configuration of radon is 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 4f^14 5s^2 5p^6 5d^10 6s^2 6p^6.For more information on electronic configuration kindly visit to
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2C2H2 + 5O2 —> 4CO2 + 2H2OIf 3.80 moles of oxygen wre used up in the reaction, how many moles of water are produced?
Answers
In order to solve this question, we can use the concept of molar ratio, which means the amount of reactant is needed in order to produce a certain amount of product. In our question we have:
2 C2H2 + 5 O2 -> 4 CO2 + 2 H2O
The molar ratio between O2 and H2O is 5:2 (we use only the numbers in front of the compound), so that means that for every 5 moles of O2 used, we will have 2 moles of H2O being produce, now we can use this information to calculate how many moles of H2O will be produced from 3.80 moles of O2
5 O2 = 2 H2O
3.80 O2 = x H2O
x = 1.52 moles of H2O are produced from 3.80 moles of O2
Petra finds a marking in the wall at a crime scene. She believes it may have been caused by a knife. What are the procedures for handling such evidence?
First, Petra photographs and measures the mark, then makes a ———— of the hole. Then she collects all the knives in the area for comparison. She packages each
o these in an immovable ———— casing with a warning label that a sharp object is enclosed.
Answers
First, Petra photographs and measures the mark, then makes a replica of the hole. She collects all the knives in the area for comparison and uses them to create additional replicas of the marking. She then carefully documents the chain of custody for each of the replicas, ensuring that they are stored securely and remain unaltered until they can be analyzed by a forensic expert. When packaging the knives, Petra uses airtight and tamper-proof containers, such as evidence bags or boxes, to prevent contamination or damage to the evidence. Each container should be clearly labeled with identifying information, such as the location, date and time of collection, and the names of those who collected and handled the evidence. It is important that Petra takes great care to preserve the integrity of the evidence and follow proper chain of custody procedures to ensure that the evidence can be used in court, if necessary.
What is the mass of 6.02 x 1024 molecules of the compound HCl?
Answers
Answer:
First, we need to determine the molar mass of HCl.
The molar mass of HCl = the mass of hydrogen (1.008 g/mol) + the mass of chlorine (35.45 g/mol) = 36.45 g/mol.
Next, we can use Avogadro's number (6.02 x 10^23 molecules/mol) to convert the number of molecules to moles:
6.02 x 10^24 molecules / 6.02 x 10^23 molecules/mol = 10 moles
Finally, we can use the molar mass to convert moles to grams:
10 moles x 36.45 g/mol = 364.5 grams
Therefore, the mass of 6.02 x 10^24 molecules of HCl is 364.5 grams.
:. It means 1 mole of Hcl
:. To find the mass of HcL
no of moles = mass/ molar mass
To get the molar mass of HCL {H=1 CL=35.5}
:. H+CL = 1+ 35.5 =36.5
So we have our molar mass and number of moles now
Then we input it in the eqn
1=x/36.5
X= 36.5g of HCl
oxidation number of Ag in Ag2O
Answers
The oxidation number of Ag in Ag2O is +1.
In Ag2O, there are two silver atoms (Ag) and one oxygen atom (O). Oxygen is known to have an oxidation number of -2 in most compounds. Since the compound is neutral, the sum of the oxidation numbers of all the atoms must equal zero.
Therefore, the oxidation numbers of the two silver atoms must add up to +2 to balance out the -2 oxidation number of the oxygen atom. Since there are two silver atoms, each silver atom must have an oxidation number of +1 to yield a total oxidation number of +2 for the compound.
In Ag2O, the silver atoms lose one electron each to form Ag+ ions. This results in an oxidation number of +1 for each silver atom. The oxygen atom gains two electrons from the silver atoms to achieve a stable octet configuration, resulting in an oxidation number of -2 for the oxygen atom. The compound Ag2O is formed through the transfer of electrons, with each silver atom exhibiting an oxidation number of +1.
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Calculate the specific heat in J/(g·ºC) of an unknown substance if a 2.50-g sample releases 12.0 cal as its temperature changes from 25.0ºC to 20.0ºC. _________J/(g·°C)
Answers
Answer:
\(\fbox{c = - 4.01 \: joule/g°C}\)
Step by step explanation:
Given:
Mass of given sample (m) = 2.50 g
Initial temperature (T1) = 25°C
Final temperature (T2) = 20°C
Heat Energy Q = 12 cal
To find:
\(Specific \: Heat \: c = \: ?\)
Solution:
We know that,
Specific heat of any substance is directly proportional to the mass and change in temperature.
Represented by equation,
\(Q = mc \triangle T\)
Where,
Q = Heat Energy
m = mass of given sample
c = specific heat
∆T = change in temperature
Substituting corresponding values,
\(Q = mc \triangle T \\ 12 = 2.5\times c \times (20-25) \\ c = \frac{12}{2.5 \times ( - 5)} \\ c = - 0.96 \: cal/g°C \\ \)
We also know that,
\(1 \: cal = 4.184 \: joules\)
multiplying above answer by 4.184,
\(c = - 0.96 \times 4.184 \\ \fbox{c = - 4.01 \: joule/g°C}\)
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Researchers investigated the influence of environmental pH on the activity of peroxidase, an enzyme that catalyzes the conversion of hydrogen peroxide to water and oxygen gas. In an experiment, the researchers added a hydrogen peroxide solution containing guaiacol to several identical test tubes and adjusted the solution in each test tube to a different pH. The researchers included the guaiacol because it caused the solutions to change color as the reactions proceeded, which the researchers relied on for measuring reaction rates. Finally, the researchers added the same amount of peroxidase to each test tube and measured the rate of each reaction at 23°C. The results of the experiment are represented in Figure 1. One of the researchers proposes using oxygen gas production to measure reaction rates. Which of the following statements best justifies the use of the proposed modification as a way of creating an appropriate control for the investigation?
O the experiment can be repeated without hydrogen peroxide, which will help eliminate an uncontrolled variable. O the experiment can be repeated without hydrogen peroxide, which will help eliminate an uncontrolled variable. O the experiment can be repeated without peroxidase, which will introduce a second independent variable. O the experiment can be repeated without peroxidase, which will introduce a second independent variable. O the experiment can be repeated without guaiacol, which will reveal the effect of guaiacol on the reaction rates. O the experiment can be repeated without guaiacol, which will reveal the effect of guaiacol on the reaction rates. O the experiment can be repeated without water, which will reveal whether the reaction can occur inside a living cell.
Answers
In studying the influence of environmental pH on peroxidase activity, researchers can repeat the experiment without guaiacol, which will reveal the effect of guaiacol on reaction rates.
The proposal to use the production of gaseous oxygenOne of the investigators' proposal to use oxygen gas production to measure reaction rates leads to a change in the dependent variable.
In the first experiment the dependent variable was the volume of guaiacol and in the second experiment the dependent variable will be oxygen production.
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All alkali metals react with water to produce hydrogen gas and the corresponding alkali metal hydroxide. A typical reaction is that between lithium and water: 2Li(s) + 2H2O(1) 2LiOH(aq) + H2(g) How many grams of Li are needed to produce 9.89 g of H₂ ?
Answers
Answer:
69.23g
Explanation:
Find out how many moles is in 9.89g of H2.
number of moles = mass(g) / molar mass
1 is the molar mass of hydrogen (to the nearest whole)
relative molecular mass of H2: 2*1 = 2
number of moles of H2 = 9.89/2 = 4.945
1 mol of H2 is produced from 2 mol of Li
so
4.945 mol of H2 produces 9.89 mol of Li
mass(g) = number of moles * molar mass
7 is the molar mass of Lithium (to the nearest whole)
mass = 9.89 * 7 = 69.23
69.23 grams of Li are needed to produce 9.89 of H2
In the game of pool, a player uses a stick called a cue to strike a white ball so
that it will hit another ball. The photo shows the white ball about to hit a blue
ball.
Through which path will mechanical energy be transferred to make the blue
ball move?
A. White ball-cue -- blue ball
B. Cue - white ball + blue ball
C. White ball pool table -- blue ball
D. Cue - pool table - blue ball
Helppp
Answers
Answer:
the answer is B: cue - white ball - blue ball.
Explanation:
The energy transfers from the stick to the white ball, then from the white ball to the blue ball. I also took this and it was correct!
The mechanical energy will be transferred through path A, which is White ball-cue -- blue ball. The correct answer is option A.
Mechanical energy is the sum of potential energy and kinetic energy in a system. It is the energy that is associated with the motion and position of an object or a system of objects.
When the player strikes the white ball with the cue, the cue transfers mechanical energy to the white ball. The white ball then collides with the blue ball, transferring some of its mechanical energy to the blue ball. This causes the blue ball to move. Therefore, option A is the correct answer.
Option B is incorrect because the cue does not come into contact with the blue ball, so it cannot transfer mechanical energy directly to the blue ball. Option C is incorrect because the pool table does not transfer mechanical energy to the blue ball. Option D is incorrect because the pool table does not transfer mechanical energy to the blue ball, and the cue does not come into contact with the pool table.Therefore, the correct answer is option A. White ball-cue -- blue ball.
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Boyle's Law states that at a constant temperature, the volume of a gas is inversely proportional
to the pressure of the gas. (V:/V2 = P2/Pa). An unknown gas has an initial pressure of 150 kPa
and a volume of 1 L. If the volume is increased to 1.5 L, what will the pressure be now?
Answers
Answer: 100kPa at constant temperature.
Explanation:boyles law v1/v2 = p2/p1
v1 = 1L, p1 = 150 kPa, v2 = 1.5L
so p2 = p1*v1/v2 = 150*1/1.5 = 100 kPa
21.
THINK SMARTER Pablo had a
cup of shredded wheat cereal,
a cup of low-fat milk, and one
other item for breakfast. He had
about 21 grams of protein.
What was the third item Pablo
had for breakfast?
Answers
About 21 protein grams were in him. Pablo's third breakfast dish was a scrambled egg.
Describe protein.Protein makes up the majority of the body's organs, tissues, and body parts, include muscle, bones, skin, and hair. It contributes to the production of hemoglobin, which transports oxygen in the blood, and enzymes, which drive numerous chemical reactions.
What is the primary advantage of consuming protein?Your muscles' primary building material is protein. Therefore, consuming enough protein will help you keep your lean muscle and encourage muscular growth when you engage in strength exercise. Eating a lot of protein can help build muscle mass and strength, according to numerous studies.
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what happens to the valency when we move down in a periodic table of non metal and metal
Answers
The valency of elements tends to decrease as we move down the periodic table of non-metal and metal.
The ability of an element to combine is referred to as valency. It is the number of electrons that an elemental atom loses, gains, or shares with another atom to form a stable configuration of electrons.
The occasional table is organized so that components with comparable valencies are set in a similar gathering. Components in a similar gathering have similar number of valence electrons, which decides their substance properties.
The valency of the elements tends to decrease as we move down a periodic table of metals and non-metals. This is because the number of electron shells, or energy levels, increases as we move down a group. The peripheral electrons in a particle are the valence electrons.
The expanded distance between the core and the peripheral electrons brings about more vulnerable fascination between them. As a result, the atom becomes more reactive and can lose or gain electrons more easily.
For instance, in bunch 1 of the occasional table, the valency of the components diminishes as we drop down the gathering. The valencies of lithium (Li), sodium (Na), and potassium (K) are, respectively, 1, 1, and 1.
This is due to the fact that each possesses one valence electron. Because the outermost electron is further from the nucleus and therefore more likely to be lost or gained, the valency decreases as we move down the group.
In conclusion, as we move down the periodic table, from non-metal to metal, the valency of elements tends to decrease. This is because the nucleus and the outermost electrons are less attracted to one another as the energy levels rise.
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Describe the function of a cilia.
Answers
Answer:
hope it helps..
Explanation:
'Motile' (or moving) cilia are found in the lungs, respiratory tract and middle ear. ... These cilia have a rhythmic waving or beating motion. They work, for instance, to keep the airways clear of mucus and dirt, allowing us to breathe easily and without irritation.
Answer: to keep airway clear of mucus and dirt allowing us to breathe easy
Explanation:
Using the chemical formula CaO + 2 NaCl → Na2O + CaCl2, calculate how many moles of CaCl2 you would produce if you used up 5.4 moles of CaO?
Answers
Answer:
5.4 moles CaO 1 mole CaCl₂ 5.4 mole CaCl₂
1 mole CaO
Explanation:
Complete the chart on the characteristics of bonds
Answers
Answer:
Face value. Corporate bonds normally have a par value of $1,000, but this amount can be much greater for government bonds.
Interest. ...
Coupon or interest rate. ...
Maturity. ...
Issuers. ...
Rating agencies. ...
Tools and tips.
What changes take place in the nucleus in step 3? A) The actinium atom loses a proton and a neutron. B) The actinium atom loses two protons and two neutrons. C) The actinium atom loses a proton and gains a neutron. D) The actinium atom loses a neutron and gains a proton.
Answers
Radioactivity is the spontaneous loss of radiation from an atom.
What is radioactivity?Radioactivity is the spontaneous loss of radiation from an atom. sometimes radioactive decay occurs in stages. Recall that radioactive decay often leads to the formation of a new nucleus.
Since the sequence of steps is not shown here, the question is incomplete and the exact process that took place in actinium can not be exactly determined.
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To determine the density of an irregularly shaped object, a student immersed the object in 22.2 mL of water in a
graduated cylinder, causing the level of the water to rise to 37.8 ml. If the object had a mass of 22.4 g, what is the
density of the object?
Answers
Answer:
Explanation:
The density would be 4.
i need help answering number 1 and number 3 50 points!!
Answers
The removal of hydrogen or any other electropositive element, or the addition of oxygen, is said to be the process of oxidation in classical or earlier concepts. An atom or ion gains one or more electrons during the process of reduction.
1. The oxidation half-reaction of copper is:
Cu → Cu²⁺ + 2e⁻
The reduction half is:
Cu²⁺ + 2e⁻ → Cu
3. An anode in electrochemistry is, in its simplest form, the site of an oxidation reaction. Due to the anode's electrical potential, negative ions or anions usually react there and release electrons. After that, these electrons ascend and enter the drive circuit.
In chemistry, the cathode is referred to as the electrode where reduction takes place. In an electrochemical cell, this is typical. Here, the cathode is negative because the cell's electrical energy supply causes chemical molecules to break down.
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what’s is the answer?
Answers
The energy of the photon of light can be obtained as 6.27 * 10^-20 J.
What is the energy of the photon?We know that a photon has to to do with a particular unit of light. We know that light can be said to be composed of very tiny corpuscles and these corpuscles of light is what we call the photon of the light.
We can be able to us the equation that is derived by Max Plank to be able to get the value of the energy of the photon of light. Now we know that a photon of light can have an energy that is able to be obtained by;
E = hf
h = Plank's constant
f = Frequency
Then;
E = 6.6 * 10^-34 Js * 9.5 * 10^13 Hz
= 6.27 * 10^-20 J
Thus as we can see from the parameters in the question, the energy of the photon is 6.27 * 10^-20 J.
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OH- of a solution that has a pH of 8.57
Answers
Answer:
I think its -8.75
Explanation:
Hope this helps!11