Answers
The question is incomplete, the complete question is;
With all of this data in hand, we can now set up our reaction. To begin we are going to use 0.7 g of (35)-2.2-dibromo-3,4-dimethylpentane. Question #7: Using the molecular weight (258 g/mol) determine the amount of mmol of (3S)-2,2,- dibromo-3,4-dimethylpentane required. Round to the tenths place
Answer:
2.70 mmols
Explanation:
Given that;
Mass of (3S)-2,2,- dibromo-3,4-dimethylpentane = 0.7 g
Molar mass of (3S)-2,2,- dibromo-3,4-dimethylpentane = 258 g/mol
From,
Number of moles = mass/molar mass
Number of moles of (3S)-2,2,- dibromo-3,4-dimethylpentane = 0.7g/258 g/mol = 2.7 ×10^-3 moles
Therefore;
Number of moles of (3S)-2,2,- dibromo-3,4-dimethylpentane = 2.70 mmols
Related Questions
What happens to the amount of solution when we add food colour to it?
Answers
Answer:
We need more? What else is in the question? This is unanswerable.
Explanation:
ch4(g) + h2o(g) 3h2(g) + co(g) enthalpy of formation of CH4
Answers
Answer:
Kc=[[CO][H2]3[CH4][H2O]
3.90=(0.30)(0.10)3[CH4]×0.02
[CH4]=0.023.90×0.30×(0.10)3=5.85×10−2 M
Thus, the concentration of methane in the mixture is 5.85×10−2 M.
When 5.00 g of sulfur are combined with 5.00 g of oxygen, 10.00 g of sulfur dioxide (SO2) are formed.What mass of oxygen would be required to convert 4.00 g of sulfur into sulfur trioxide (SO3)?
Answers
Answer:
\(m_{O_2}=6gO_2\)
Explanation:
Hello,
In this case, given the reaction:
\(2S+3O_2\rightarrow 2SO_3\)
Thus, for 4.00 g of sulfur (atomic mass = 32 g/mol), we apply the shown 2:3 mole ratio with oxygen (molar mass = 32 g/mol) in order to compute its requirement:
\(m_{O_2}=4.00gS*\frac{1molS}{32gS}*\frac{3molO_2}{2molS}*\frac{32gO_2}{1molO_2}\\ \\m_{O_2}=6gO_2\)
Best regards.
The mass of oxygen would be required is \(6gO_2\)
The calculation is as follows;\(= 4.00 \times \frac{1molS}{32gS} \times \frac{3molO_2}{2molS} \times \frac{32gO_2}{1molO_2} \\\\= 6gO_2\)
Here for 4.00 g of sulfur (atomic mass = 32 g/mol), we used the shown 2:3 mole ratio with oxygen (molar mass = 32 g/mol).
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what is the volume occupied by 6.8gm of H2S at STP (at mass H=1,S=32)
Answers
The volume occupied by 17g of H2S at s.t.p. is [H = 1.00, S = 32.0, Molar volume = 22.4 dm3]
Options
A) 11.2dm 3
What is the correct IUPAC name for CsHSO₃?
Answers
The IUPAC name of the compound is cesium hydrogen trioxosulfate IV.
We can see that the central atom in this compound is sulfur. We have to deduce its oxidation state as follows;
1 + 1 + x + 3(-2) = 0
2 + x - 6 = 0
x = 4
Recall that in writing the IUPAC name of a compound the oxidation state of the central atom is written after the name of the atom.
Hence, the compound is cesium hydrogen trioxosulfate IV.
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What will be the cost of gasoline for a 4,700-mile automobile trip if the car gets 41 miles per gallon, and the average price of gas is $3.79 per gallon?
Answers
Answer:
Idk
Explanation:
Find the gallons needed by dividing total miles by miles per gallon:
4700/41 = 114.634 gallons
Multiply the gallons needed by price per gallon:
114.634 x 2.79 = $319.83 Total
Round the answer as needed.
If gallons were rounded to 115 gallons total cost would be $320.85
$ 434.40
Explanation:41 miles ............ 1 gallon
4700 miles .......x gallon
x = 4700×1/41 = 114.63 gallons
114.63 gallons×$3.79 ≈ $ 434.40
Which option contains an example of a polyatomic ión? (1 point)
O KNO3
O CaCl₂
O 02
O MgCl
Answers
Answer:
KNO3 is an example of a polyatomic ion
A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 258 torr . Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature.
What is the mole fraction of hexane? (Assume ideal behavior.)
Answers
Answer:
The mole fraction of hexane is 0.61
Explanation:
Raoult's law allows calculating the vapor pressure of a substance when it is forming part of an ideal solution, knowing its vapor pressure when it is pure (at the same temperature) and the composition of the ideal solution in terms of mole fraction.
Pi=xi*Pi°
where Pi is the partial pressure of component i in the solution, Pi ° is the vapor pressure of component i pure and xi is the mole fraction of component i in the liquid phase.
In a solution, once the components have reached chemical equilibrium, the total vapor pressure is:
Psolution=P1 + P2=x1*P1° +x2*P2°
In this case:
Psolution= xpentane*Ppentane° +xhexane*Phexane°
Being:
Psolution= 258 torrxpentane + xhexane=1 ⇒ xpentane= 1 - xhexanePpentane°= 425 torrxhexane= ?Phexane°= 151 torrand replacing:
258 torr= (1-xhexane)* 425 torr + xhexane* 151 torr
you get:
258 torr= 425 torr - 425 torr*xhexane + xhexane* 151 torr
258 torr - 425 torr= - 425 torr*xhexane + xhexane* 151 torr
-167 torr= -274 torr*xhexane
\(xhexane=\frac{-167 torr}{-274 torr}\)
xhexane= 0.61
The mole fraction of hexane is 0.61
Which compound contains about 27% carbon by mass
Answers
Methane, also known as \(CH_{4}\), is a substance that has 27% carbon by mass. \(C_{3}H_{8}\) is a different molecule that has 27% mass-based carbon.
Which chemical contains 27% carbon by mass, and how can you tell?Carbon has a molar mass of 12.01 g/mol. Finding compounds with molar masses similar to 27 g/mol will help us figure out which chemical has about 27% carbon by mass, as 27% of 27 g/mol is roughly 7.3 g/mol (because 27% is comparable to 0.27).
The chemical \(CH_{4}\), which has a molar mass of roughly 16 g/mol, is one that fulfils this definition. We can use the following formula to get the percentage of carbon in \(CH_{4}\):
(Mass of Element / Molar Mass of Compound) x 100% Equals % composition
The % content of carbon in methane is as follows:
Mass of carbon divided by the molar mass of methane yields the percentage of carbon.
% of carbon is equal to (12.01 g/mol / 16.04 g/mol) multiplied by 100.
Carbon content as a percentage: 74.97%
As a result, methane does not contain 27% of its mass in carbon.
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Find the concentration of the missing substance
11) A + B = C
K=20,
IAl=2,
[B=5
[C] =
12) A(s) + B(ag) = C(g)
K = 10
B=
Answers
11. The concentration of C is 200
12. The concentration of B is 0.4
How do i determine the equilibrium concentrations?Equilibrium constant, K is defined as follow:
nReactant ⇌ mProduct
Equilibrium constant, K = [Product]ᵐ / [Reactant]ⁿ
With the above formula, we can obtain the equilibrium concentration of the missing substance as follow:
11. For concentration of C
A + B ⇌ CEquilibrium constant (K) = 20Concentration of A, [A] = 2Concentration of B, [B] = 5Concentration of C, [C] =?K = [C] / [A][B]
20 = [C] / (2 × 5)
20 = [C] / 10
Cross multiply
[C] = 20 × 10
Concentration of C, [C] = 200
12. For concentration of B
A(s) + B(aq) ⇌ C(g)Equilibrium constant (K) = 10Concentration of C, [C] = 4Concentration of B, [B] = ?K = [C] / [B]
10 = 4/ [B]
Cross multiply
10 × [B] = 4
Divide both sides by 10
[B] = 4 / 10
Concentration of B, [B] = 0.4
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Complete question:
Find the concentration of the missing substance
11) A + B = C
K = 20
[A] = 2
[B] = 5
[C] =?
12) A(s) + B(ag) = C(g)
K = 10
[C] = 4
[B] = ?
Convert the following numbers
540,000
Answers
The result in binary would be 10000011110101100000.
By constantly dividing the supplied number by 2 until we receive 0 as the quotient, we can convert a decimal number to a binary number in the simplest way possible. The binary value of the specified decimal number is then obtained by writing the remainders in reverse order. A binary number is made up of two 0s and 1s. Two is used as the base representation for binary numerals. As an illustration, (101)2 (101) 2. Switches can be used to encode and store numbers in binary form. This system is compatible with a variety of digital devices, including computers, calculators, digital TV decoder boxes, cell phones, burglar alarms, watches, and more. Binary values are kept in memory, which is essentially a collection of electronic on/off switches.
The complete question is- Convert 540000 to Binary form.
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1. What is the mass of 9 moles of aluminum (AI)
Answers
In order to find the mass of 9 moles of aluminium, we have to use its molar mass, which is 26.98 g/mol, that means that in each mol of aluminium we have 26.98 grams of it. Now with 9 moles we can find the result doing a simple calculation:
26.98 g = 1 mol
x grams = 9 moles
x = 242.82 grams of Aluminium in 9 moles
Which of the following are the weakest among the intermolecular forces? (5 points)
Ion-dipole forces
Hydrogen bonding
Dipole-dipole forces
London dispersion forces
Answers
London dispersion forces are known to be the weakest among the intermolecular forces. Therefore, option (D) is correct.
What are London dispersion forces?London dispersion forces can be described as a type of intermolecular force acting between atoms and molecules that are generally electrically symmetric. The electrons are generally symmetrically distributed with respect to the nucleus and are part of the van der Waals forces.
The electron distribution around an atom undergoes varies in time which creates electric fields felt by other nearby atoms and molecules.
The net effect is in electron positions in an atom produce a corresponding redistribution of electrons in other atoms. These are the weakest among the other intermolecular forces.
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HQ5.40
Homework Answered Due Today, 11:59 PM
The reaction 3H₂(g) + N₂(g) → 2NH3(g) has an enthalpy of reaction of -92.6 kJ/mol. If 1 g of hydrogen and 2 g of nitrogen are
reacted, how much heat is produced (kJ)?
Answers
The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ
How do i determine the heat energy produced?First, we shall obtain the limiting reactant. Details below:
3H₂ + N₂ -> 2NH₃
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 g Molar mass of H₂ = 2 g/molMass of H₂ from the balanced equation = 3 × 2 = 6 gFrom the balanced equation above,
28 g of N₂ reacted with 6 g of H₂
Therefore,
2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂
We can see that only 0.43 g of H₂ is needed in the reaction.
Thus, the limiting reactant is N₂
Finally, we the amount of heat energy produced. Details below:
3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 gFrom the balanced equation above,
When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.
Therefore,
When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ
Thus the heat energy produced from the reaction is -6.61 KJ
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If the amount of radioactive phosphorus-32 in a sample prepared for treatment of leukemia decreases from 1.2g to 0.30g in 28.6 days, what is the half-life of phosphorus-32? Express the answer in 2 significant figures.
Answers
The half-life of the phosphorus-32, given the data is 14.3 days
What is half-life?Half-life is the time taken for half a material to decay.
Determination of the number of half-lives that has elapsedWe'll begin by obtaing the number of half-lives that has elapsed. This can be obtained as follow:
Original amount (N₀) = 1.2 gAmount remaining (N) = 0.3 gNumber of half-lives (n) =?2ⁿ = N₀ / N
2ⁿ = 1.2 / 0.3
2ⁿ = 4
Express 4 in index form
2ⁿ = 2²
n = 2
Thus, 2 half-lives has elapsed.
How to determine the half-lifeNumber of half-lives (n) = 2Time (t) = 28.6 daysHalf-life (t½) =?The half-life of the phosphorus-32 can be obtained as follow:
t½ = t / n
t½ = 28.6 / 2
t½ = 14.3 days
Thus, the half-life of the phosphorus-32 14.3 days
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An actual measurement of a sample is 3.5 m. The measured
value is 2.5 m. What is the percent error in the measurement?
a 27 percent
b 29 percent
C 10 percent
d 40 percent
Answers
Answer: b 29 percent
Explanation:
Answer:
B. 29 percent
Explanation:
hope this helps
Which of the following factors would affect weather?
When warm air meets cool air, the warm air rises, cools off, and falls as rain.
Air moves as wind from an area of high pressure to an area of low pressure.
Air stays awhile over a surface area with uniform humidity and temperature.
All of the above
Answers
Answer: Hewo, there!
All of the above wold be my answer
Explanation:
Although many factors combine to influence weather, the four main ones are solar radiation, the amount of which changes with Earth's tilt, orbital distance from the sun and latitude, temperature, air pressure and the abundance of water.
Hope this helps you!!
Have a great day
Name the following compounds NH4CI
Answers
The compound NH4Cl or ammonium chloride is composed of two ions: ammonium ion (NH4+) and chloride ion (Cl-). The ammonium ion is a polyatomic cation made up of one nitrogen atom and four hydrogen atoms, while the chloride ion is a monatomic anion made up of one chlorine atom.
Which amphibian organ has a high blood supply and many folds to increase surface area?
a. heart
b. stomach
c. lungs
d. brain
Answers
Answer:
lungs
Explanation:
Ash, dust, pollen, and tiny bits of salt from water are all examples of
Science btw
Answers
Answer:
Particulate
Explanation:
Ash, dust, pollen, and tiny bits of salt from water are all examples of particulate
f-orbital can accommodate maximum of... electron?
Answers
Explanation:
S= 2
P=6
D=10
F= 14
F orbital holds a maximum of 14 electrons
Answer:
14.
Explanation:
The f level consists of 7 orbitals and each can accommodate up to 2 electrons.
Determine the molar mass of an unknown monoprotic acid to two decimal places if 16.98 mL of a 0.086 M NaOH solution were used to titrate 0.236 g of the unknown acid
Answers
1 ) Chemical equation
\(\text{NaOH + HX}\rightarrow H_2O+Na^++X^-\)HX represents the unknown acid.
2) Moles of NaOH in the reaction
\(M=\frac{\text{moles of solute}}{\text{liters of solution}}\)Convert mL into L
\(L=16.98mL\cdot\frac{1L}{1000mL}=0.01698L\)Plug in known values in the equation and solve for moles.
\(0.086M=\frac{\text{moles of NaOH}}{0.01698L}\)\(\text{mol NaOH= 0.086M}\cdot0.01698L=0.00146028\text{ mol NaOH}\)3) Moles of the unknown acid that reacted with 0.00146028 mol NaOH
Molar ratio
1 mol NaOH: 1 mol HX
\(\text{mol HX=0.00146028 mol NaOH}\cdot\frac{1\text{ mol HX}}{1\text{ mol NaOH}}=0.00146028\text{ mol HX}\)4) Molar mass of the unknown monoprotic acid
\(\text{Molar Mass=}\frac{\text{mass of solute (g)}}{moles\text{ of solute}}\)Plug in known values and solve
\(\text{Molar Mass}=\frac{0.236\text{ g HX}}{0.00146028\text{ mol HX}}=161.61\text{ g/mol}\)The molar mass of the unknown monoprotic acid is 161.61 g/mol
.
samples of the gases carbon dioxide =44 and hydrogen =2 ar rhe same temperature,compare the speed of the molecules in these two gases
Answers
Answer:
The speed of molecules in a gas is directly proportional to the square root of the temperature and inversely proportional to the square root of the molar mass.
Since both gases are at the same temperature, we only need to compare their molar masses.
The molar mass of carbon dioxide (CO2) is 44 g/mol and the molar mass of hydrogen (H2) is 2 g/mol.
Therefore, the square root of the molar mass of hydrogen is smaller than the square root of the molar mass of carbon dioxide.
This means that the speed of hydrogen molecules is greater than the speed of carbon dioxide molecules at the same temperature.
The single strand of nucleic acid shown is representative of
A). RNA
B). DNA
C). both RNA and DNA
D). protein
Answers
PLEASE ANSWER THIS FAST... tysm
●what will happen to the texture off egg shell if you place it in.
1. Coca cola
2. orange juice
3. grape juice
4. normal water
5. a dark coloured sugary drink like sting
Answer all these correctly please
thanks
Answers
Answer:
4. the egg shell you place in normal water
Predict the products of the following reaction:
HCN + RbOH
Answers
Answer:
Rubidium Cyanide and Water
Explanation:
The illustration to the left represents a mixture of phosphorus ( orange ) and fluorine ( green ) molecules.
Answers
In the image we can see that there are 1 phosphorus (P4) molecules and 7 fluorine molecules.
According to the stoichiometry of the reaction, one molecule of phosphorus (P4) and 6 molecules of fluorine (F2) are needed to form 4 molecules of PF3.
The answer is:
The limiting reagent is phosphorus (P4)
The number pf PF3 molecules formed is 4 and
The number of fluorine atoms/molecules in excess is 1.
Which of the following is a type of natural disaster that has impacted Florida?
A. Avalanche
B. Flood
C. Typhoon
D. Volcano
I think it's either flood or typhoon, but just to make sure I'll ask.
Please answer this, the best and correct answer will get brainliest.
Answers
Answer:
flood
Explanation:
i put typhoon and i got it wrong, volcanoe is not a natural disaster and even ifit was they are nowhere near florida, and an avalanche cant happen in florida because there is no snow, and learn from my mistake and put FLOOD, not typhoon.
which of these bonds ( n-cl p-cl as-cl sb-cl ) is the most polar covalent based on electronegativities?
Answers
The most polar covalent bond among the given bonds based on electronegativity is NCl.
The polarity of bonds occurs due to the electronegativity difference among the elements. The property of an atom to attract the electron density toward itself is known as electronegativity. The more the electronegativity difference, the higher the bond polarity.
Electronegativity - The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is known as electronegativity.
The greater the electronegativity difference more the bond will be polar.
electronegativity order: N > P > As > Sb
So, correct order of polarity among the given bonds:
Ncl > Pcl > Ascl > Sbcl
So, the most polar covalent bond among the given bonds is Ncl.
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2 A high school student takes a lump of magnesium with a volume of 150.0 mL and adds it to a beaker of
an aqueous solution of aluminum nitrate. What is the mass of the solid aluminum that forms?
Solid magnesium has a density of 1.738 g/cm³.
Answers
The mass of the solid aluminum that forms are 192.73 grams
To determine the mass of solid aluminum that forms, we need to use stoichiometry and the balanced chemical equation for the reaction between magnesium and aluminum nitrate.
The balanced chemical equation is:
3 Mg + 2 Al(\(NO_{3}\))3 → 3 Mg(\(NO_{3}\))2 + 2 Al
The equation shows that 3 moles of magnesium react with 2 moles of aluminum to produce 2 moles of aluminum nitrate.
To calculate the mass of solid aluminum, we need to know the amount of magnesium used. Given that the volume of the magnesium is 150.0 mL and its density is 1.738 g/cm³, we can calculate the mass of magnesium using the formula:
Mass = Volume × Density
Mass of magnesium = 150.0 mL × 1.738 g/cm³ = 260.7 g
Now, using the molar mass of magnesium (24.31 g/mol) and the molar ratio from the balanced equation, we can determine the moles of magnesium used:
Moles of magnesium = Mass of magnesium / Molar mass of magnesium
= 260.7 g / 24.31 g/mol
= 10.72 mol
According to the stoichiometry of the balanced equation, the ratio of moles of magnesium to moles of aluminum is 3:2. Therefore, the moles of aluminum formed will be:
Moles of aluminum = (2/3) × Moles of magnesium
= (2/3) × 10.72 mol
= 7.15 mol
Finally, we can calculate the mass of solid aluminum using its molar mass (26.98 g/mol):
Mass of aluminum = Moles of aluminum × Molar mass of aluminum
= 7.15 mol × 26.98 g/mol
= 192.73 g
Therefore, the mass of the solid aluminum that forms is approximately 192.73 grams.
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