in a reaction, the concentration of a reactant was increased from 2.5 m to 7.5 m and the rate was observed to change from 1.30e-2 m/s to 1.17e-1 m/s. what is the order of the reactant?
Answers
In a reaction, the concentration of a reactant was increased from 2.5 m to 7.5 m and the rate was observed to change from 1.30e-2 m/s to 1.17e-1 m/s. 2 is the order of the reactant.
The rate law of a chemical reaction expresses the dependence of the reaction rate on the concentrations of the reactants. For a simple reaction involving only one reactant, the rate law has the form:\(rate = k[A]^n\)
In this case, we have two sets of initial concentrations and rates:
Experiment 1:
[A] = 2.5 M
rate = 1.30 × \(10^-2 M/s\)
Experiment 2:
[A] = 7.5 M
rate = 1.17 × \(10^-1 M/s\)
Substituting the values from the experiments, we get:
\(1.17 × 10^-1 M/s / 1.30 × 10^-2 M/s = (7.5 M / 2.5 M)^n\)
\(9 = 3^n\)
Taking the logarithm of both sides, we get:
n = log(9) / log(3) = 2
Therefore, the order of the reaction with respect to the reactant is 2.
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Related Questions
Calculate the pH of a 0.25 M solution of NaNO2 (Ka(HNO2) = 4.5 x 10^-4) (1.97)
a) pH = 3.35
b) pH = 4.45
c) pH = 5.55
d) pH = 6.65
Answers
The pH of a 0.25 M solution of NaNO2= 6.65.
Given the concentration of NaNO2, we can find the concentration of NaOH and HNO2 as follows:
NaNO2 = 0.25 MNaOH = HNO2 = x
(since they have equal concentrations due to the stoichiometry of the reaction)
Thus, we can write the equilibrium constant expression as:
Ka = x^2/0.25
Now, let's solve for x:
x^2 = 0.25 x 4.5 x 10^-4x = √(0.25 x 4.5 x 10^-4) = 0.015
This value represents the concentration of both HNO2 and NaOH. Since we are interested in pH, we need to find the concentration of H+ ions using the following equation:
Kw = [H+][OH-]
Since we have found the concentration of OH- (which is the same as the concentration of NaOH),
we can solve for H+:
Kw = 1.0 x 10^-14[H+][0.015] = 1.0 x 10^-14[H+] = 6.7 x 10^-13
Finally, we can find pH:
pH = -log[H+]pH = -log(6.7 x 10^-13)pH = 6.65
Therefore, the correct option is d) pH = 6.65.
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Which of these should deviate the least from the ideal gas law at low temperature? NH3 PH3 O Ar He O O O2
Answers
Helium (He) would be expected to deviate the least from the ideal gas law at low temperature.
What is Temperature?
Temperature is a measure of the average kinetic energy of the particles in a substance or system. In simpler terms, it is a measure of how hot or cold an object or environment is. Temperature is a physical quantity that is usually measured using a thermometer or other temperature sensing device. The standard unit of temperature in the International System of Units (SI) is the kelvin (K), although Celsius (°C) and Fahrenheit (°F) are also commonly used units.
At low temperatures, gases with weaker intermolecular forces and lower molecular weights tend to deviate less from the ideal gas law. Among the options given, helium (He) and neon (Ne) have the lowest molecular weights and weakest intermolecular forces, so they are most likely to follow the ideal gas law at low temperatures.
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Which best replaces the question mark?
Answers
Answer:Waves.sry if this is wrong.
Explanation:
A change of matter from one form to another without changing its chemical properties ?
Options:
Physical change
Chemical change
Answers
Explanation:
A physical change does not change the chemical properties of a compound. Instead a change in state occurs, for example evaporation where a liquid becomes a gas.
Answer:
Physical change
Explanation:
A physical change is a change of matter from one form to another without a change in chemical properties.
The list identifies various properties of four elements: element 1 is a gas at room temperature. Element 2 is a solid which conducts electricity. Element 3 is a gas with an effective nuclear charge of +7. Element 4 is malleable and can take the form of a shiny solid sheet. Based on this list, which elements are metals?.
Answers
An element is a basic object that is difficult to break down into smaller pieces/ malleable. As a result, choice D is right.
Describe element.An element is a species of atoms with a specified number of protons in their nuclei, including the pure substance comprised completely of that species. Contrary to chemical compounds, chemical elements cannot be broken down into smaller molecules through any chemical process.
A substance that cannot be broken down by non-nuclear processes in physics and chemistry is called an element. In computers and mathematics, an element is a discrete part of a larger system or collection.
The three major divisions of the Periodic Table are metals, nonmetals, and metalloids. The components of each category have similar physical and chemical properties. Among the physical characteristics used to separate the three groups are, A substance's capacity to reflect light is referred to as luster.
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PLEASE ANSWER QUICK!!!!!! 40 POINTS!!!!
which particle model represents the average kinetic energy of gas particles according to kinetic molecular theory?
Answers
Particle model B represents the average kinetic energy of gas particles according to kinetic molecular theory. Therefore, the correct option is option B.
The average kinetic energy of gas particles is exactly proportional to the temperature of the gas, according to kinetic molecular theory. This essential notion contributes to the understanding of gas behaviour and properties. The kinetic molecular hypothesis states that gas particles are always moving at random. They move in straight lines until they clash with other particles or the container's walls.
During collisions, gas particles exchange energy with one another. When one particle collides with another, its kinetic energy might be gained or lost, but the total energy in the system remains constant. The average kinetic energy of gas particles is related to the gas's absolute temperature. The average kinetic energy of the particles increases as the temperature rises.
Therefore, the correct option is option B.
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8) If you apply a force of 50N to an object, but the object doesn't move,
how much WORK has been accomplished? Explain.
Answers
0 J
Work = Force * Displacement
Since displacement is 0 m (object isn't moving), work would also be 0.
what mass in grams of ch3oh would need to be added to 270g of water in order to lower freezing point
Answers
30.7 g of CH3OH would need to be added to 270 g of water to lower its freezing point by 1.0 °C.
To determine the mass of CH3OH needed to lower the freezing point of 270g of water, we need to use the freezing point equation:
ΔT = Kf·m
To calculate the molality of the solution, we need to convert the mass of water to kilograms:
mass of water = 270 g = 0.27 kg
Since we are assuming that only CH3OH is being added to the water, the number of moles of CH3OH can be calculated using its mass and molar mass:
molar mass of CH3OH = 32.04 g/mol
moles of CH3OH = mass of CH3OH / molar mass of CH3OH.
using the freezing point :
ΔT = Kf·m
ΔT = \(T_{f}\) - T0
where \(T_{f}\) is the freezing point of the solution and T0 is the freezing point of pure water (0 °C).
Since we want to lower the freezing point of water, ΔT is negative, so we can rearrange the equation to solve for the mass of CH3OH:
mass of CH3OH = (ΔT / Kf) · molar mass of CH3OH · mass of solvent
Substituting the known values:
ΔT = -1.86 °C (the freezing point for a 1-molal solution of any solute in water)
T0 = 0 °C
molar mass of CH3OH = 32.04 g/mol
mass of solvent = 270 g = 0.27 kg
We can solve for m by rearranging the molality equation:
m = moles of solute/mass of solvent (in kg)
ΔT = Kf·m
-1.0 °C = (1.86 °C·kg/mol) · m
m = -0.538 mol/kg
Substituting the values into the mass equation:
mass of CH3OH = (-1.0 °C / (1.86 °C·kg/mol)) · 32.04 g/mol · 0.27 kg / (-0.538 mol/kg)
mass of CH3OH = 30.7 g
Therefore, 30.7 g of CH3OH would need to be added to 270 g of water to lower its freezing point by 1.0 °C.
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You just learned that phase changes do not always happen in an expected way. If you were a professional scientist studying this situation, how would you go about investigating this phase change? What other questions would you ask ? Write your response in the space below
Answers
The answers include the following:
The way I will go about investigating this phase change is by understanding different ways that phase change happens.I would ask questions like, how does phase change happen in ways unexpected or what are different ways that phase change can occur?What is Phase?This is referred to as a region of space, throughout which all physical properties of a material are essentially uniform and are distinct stages of development.
The most appropriate way in investigating this phase change is by understanding different ways and techniques that phase change happens so as to be knowledgeable about how their properties aids this process.
The best question to ask will be how phase change happen in ways unexpected and also the different ways that phase change can occur thereby making it the correct choice.
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When copper sulphide ares are roasted in a furnace, sulphur dioxide SO₂, forms. What is the molar mass of SO,?
Answers
Answer:
48.059
Explanation:
Find on periodic table and add
32.06+15.99
ou are on a trip cross country. You are very concerned about visibility as you pass over the Rocky Mountains. Based on the data from this weather station, what is visibility?
Responses
A 5 miles
B 20 miles
C 77 yardS
D .3 miles
Answers
From the report of this weather station, the visibility over the mountains is 5 miles.
What is the visibility?We know that the visibility across the mountain ranges is dependent on the weather. The weather has to do with the condition of the atmosphere over a given region at a particular time. We must know that the weather condition does change from time to time over a place.
Now, the weather can be monitored from a weather station which has a lot of weather equipment that have the aim of being able to gather the important weather information for the use of the public.
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in your own words describe the process of a physical change
Answers
Answer:
A physical change is when the form of an object changes, but the substance stays the same.
Example: Ice melting into water.
What is the volume of 0.05 mol of neon gas
Answers
Answer:
1.12L
Explanation:
multiply 0.05 ×22.4
4 × 10-5 cm in scientific notation
Answers
Answer:
400000
Explanation:
First, figure out what 10^5 is. It is 100000. Then multiply it by 4 and there is your answer!
Also if it is 4x10^-5, it is 0.00004!
Oh yeah! If you want it to be in scientific notation, it is: 4x10^5
Since that I didn't quite understand what you are trying to question, it is either 4x10^5 or 4x10^-5!
If a student measured an object's density to be 2.70 g/mL, 2.32 g/mL, 2.12 g/mL and 3.88, then his results would considered ______The object's actual density is 3.50 g/mL A. Accurate and precise B.Precise but not accurate C. Neither accurate nor precise D.Accurate but precise
Answers
Answer:
C. Neither accurate nor precise
Explanation:
The student's results would be considered precise if they were close to one another. However they vary significantly from one another.Regarding accuracy, they would be considered accurate if they were close to the actual value. The given results are too far away from the actual value.Thus the results are neither accurate nor precise.
Why it is necessary for plants to have chloroplasts?
In your own words, please
Answers
Chloroplasts is an important part in the process of photosynthesis in some organisms. The chloroplast absorbs the energy in sunlight and uses it to produce sugars.
The main function of chloroplast in plants is to convert light energy into chemical energy via the photosynthesis process.
What is the role of chloroplasts in plants?Photosynthetic chlorophyll is found in chloroplasts, which catch sunlight and converts it into chemical energy, releasing oxygen from water. All green plants and algae have chloroplasts. Chloroplasts help plants in the formation of food.
Chloroplasts are found in the leaves of the plant's guard cells. Chloroplasts contain a lot of chlorophyll, which helps to trap sunlight. The chloroplast is capable of reproducing without any help from the rest of the cell.
The primary job of chloroplast is to produce food through the photosynthesis process. Chloroplast has a component called chlorophyll, which traps sunlight and is used for food synthesis or sugar and other organic molecules in all green plants. They also form lipid components and amino acids that are required for chloroplast membranes.
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In certain species of pine trees, short needles (S) are
dominant to long needles (s). Both parents are
heterozygous for having short needles. Create a Punnett
Square to determine, wha tis the probability of an
offspring having long needles?
BRAINLIEST TO CORRECT
Answers
Answer:
Below
Explanation:
Heterozygous mean a dominant and a recessive gene.
S (dominant) = short needles
s (reccessive) = long needles
Parent 2 S s
Parent 1
S
s
S s
S SS Ss
s Ss ss
For an offspring to have long needles, both alleles have to be s ( recessive allele for long needle) or ss . That's only occurs in 1/4 pairing so the probability is 25%
In most mirrors, the virtual image appears to come from behind the mirror. True False
Answers
Answer
False
Explanation:
describe the three states of matter that are present when snow melts
Answers
Answer:
solid liquid and gas
Explanation:
ice is a solid then it melts to liquid and evaporates into gas
Answer:
Snow is basically water;
ice/snow is solid state
water is liquid state
vapour is gaseous state
Explanation:
oil pressure safety controls measure the difference in pressure to establish ____.
Answers
In general, oil pressure safety controls are devices that keep oil pressure within safe limits in hydraulic systems. They're designed to track the difference in pressure between the oil supply and the oil return.
This difference in pressure is important since it serves as a signal to the system that the required oil pressure has been attained and the system is secure to use.Oil pressure safety controls use oil pressure sensors to monitor the pressure differential between the oil supply and the oil return. When this difference in pressure falls below a specific point.
The control system will activate a switch that signals the hydraulic system to stop working to avoid damage to the system's components.Oil pressure safety controls are a critical component of hydraulic systems. They play a vital role in preventing equipment failure and ensuring operator safety. They do this by ensuring that oil pressure remains at a safe level during system operation. In summary, oil pressure safety controls measure the difference.
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What is meant by isomerism?
Answers
What is meant by isomerism?
➪ Two or more compounds having the same molecular formula but different structures are called isomers and this process is known as isomerism...~
Explanation:
Isomerism is basically denoted to two compounds having same molecular formula but different structures ,functional groups,bonds at different places.
It's of three types
FunctionalPositionalStructuralExplain stereoisomerism in tartaric acid. How many optical isomers are possible for tartaric acid? What are the differences between meso tartaric acid and racemic mixture?
Answers
Stereoisomerism refers to a type of isomerism in which two compounds have the same chemical formula and bond sequence but differ in spatial orientation of atoms.
Tartaric acid has two stereocenters, meaning it has two chiral carbon atoms. As a result, four different stereoisomers are possible: D-tartaric acid, L-tartaric acid, meso-tartaric acid, and racemic tartaric acid.
The Differences between meso tartaric acid and racemic mixture:In a racemic mixture, equal amounts of the L and D forms are present. When a compound has a racemic mixture, it is optically inactive because the left- and right-handed isomers have identical physical properties and therefore cannot rotate plane-polarized light
. It is also known as a racemate. Meso-tartaric acid, on the other hand, is optically inactive and does not rotate plane-polarized light despite having two chiral centers.
This is because it has a plane of symmetry, which means it is superimposable on its mirror image.
It is the only achiral stereoisomer of tartaric acid and is formed when one chiral carbon has an R configuration and the other has an S configuration. Meso-tartaric acid is not a racemate because it is a single compound, but it does have a stereoisomer that is an enantiomeric pair (D-tartaric acid and L-tartaric acid).
There are three possible stereoisomers of tartaric acid: D-tartaric acid, L-tartaric acid, and meso-tartaric acid. When these three forms are mixed in equal amounts, racemic tartaric acid is formed.
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While Cameron is intensely working out, his muscles begin to get sore and start to burn. What type of cellular
respiration is occurring in his body and what is the product that is causing his muscles to burn? What should Cameron
do to stop this burning feeling?
Answers
Answer:
1) Anaerobic respiration
2) Lactic acid
3) Stop the work out
Explanation:
1) Anaerobic respiration
Muscular anaerobic respiration to produce energy during exercises or workout, takes place when the level of oxygen available for the amount of energy being generated is not sufficient, and the balance generated energy is produced along with lactic acid by anaerobic respiration
2) Lactic acid
The produced lactic acid from the anaerobic respiration at the muscle sites results in a burning sensation being felt during strenuous muscular activity in the presence of low oxygen supply
3) Stop the work out
In order to stop the burning, the muscular activity is to be stopped, to allow the resumption of the aerobic process of energy production, and to allow the produced lactic acid to be cleared
Why do atoms tend to form ions with eight valence electrons?
Answers
2 Which thing has the most mass?
O marble
elephant
O fork
Obaseball
Answers
Explanation:
marble is the correct answer
Answer:
Elephant
Explanation:
An elaphant is the option with the most mass.
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21.) This substance consists of two or more nonmetal elements in a fixed ratio.
a.) element
b.) mixture
c.) molecule
d.) compound
Answers
Answer:
Molecule
Explanation:
when two or more than two non-metal elements are combined then it form Molecule.
nitrogen boils at -196°c. what is the corresponding temperature in the fahrenheit scale?
Answers
To convert -196°C to Fahrenheit, you can use the formula: F = (C x 1.8) + 32. Plugging in -196 for C, you get:
F = (-196 x 1.8) + 32
F = -320.8
Therefore, nitrogen boils at -320.8°F. It's important to note that Fahrenheit and Celsius scales have different zero points and different degrees of size. This means that -196°C is a much lower temperature than -320.8°F, as the Fahrenheit scale has a smaller degree of size. This conversion is useful for comparing temperatures across different measurement systems, and for understanding the temperature ranges of different substances and materials.
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In order to go to a lower energy orbit, an electron
A) must be transferred to another atom.
B) loses energy of a specific amount.
C) must disappear.
D) must combine with other electrons.
Answers
Which of these would describe a dish that contains bits of chocolate and nuts you can see?
homogeneous mixture
compound
heterogeneous mixture
none of the above
Answers
Answer:
mezcla homogénea
Answer:
heterogeneous mixture
Explanation:
you can split the mixture easily with you hands while homogeneous mixtures is dissolved
What type of change occurs at the molecular level?
Answers
When two or more molecules interact, chemical changes take place at the molecular level.
What transpires during a chemical change at the molecular level?The molecules in the reactants interact during a chemical reaction to create new compounds. No new material is created during a physical change, such as a state shift or dissolution. You may also assert that no atoms are generated or destroyed during a chemical reaction, so explain this.
How do molecular shifts in phase happen?The intermolecular interactions between the water molecules are weakening at the molecular level. The water molecules have access to enough energy from the heat to repel these forces. Intermolecular forces are either increased or decreased after every phase shift.
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