If 25.6 mL isopropyl alcohol fully decomposes, what mass of H2 is formed? The density of isopropyl alcohol is 0.785 g/mL. g

Answers

Answer 1

Answer:

The correct answer is 0.67 g H₂

Explanation:

Isopropyl alcohol (C₃H₇OH) can decompose to give acetone (C₂H₆OH) and hydrogen gas (H₂) according to the following chemical equation:

C₃H₇OH (g) ⇒ C₂H₆CO(g) + H₂(g)

We can calculate the initial mass of isopropyl alcohol from the density and volume data:

density = m/V = 0.785 g/mL

⇒ m = density x V = 0.785 g/mL x 25.6 mL = 20.096 g C₃H₇OH

According to the chemical equation 1 mol of C₃H₇OH gives 1 mol H₂. The molar mass of C₃H₇OH is:

molar mass C₃H₇OH = (12 g/mol x 3) + (1 g/mol x 7) + 16 g/mol + 1 g/mol = 60 g/mol

molar mass H₂ = 1 g/mol x 2 = 2 g/mol

So, we obtain: 2 g H₂ from 60 g C₃H₇OH. We multiply this stoichiometric ratio (2 g H₂/60 g C₃H₇OH) by the initial mass of C₃H₇OH to obtain the mass of H₂ is formed:

20.096 g C₃H₇OH x (2 g H₂/60 g C₃H₇OH) = 0.6698 g ≅ 0.67 g H₂


Related Questions

what’s the most abundant isotope of lawrencium

Answers

Answer:

266Lr

Thirteen isotopes of lawrencium are currently known; the most stable is 266Lr with a half-life of 11 hours, but the shorter-lived 260Lr (half-life 2.7 minutes) is most commonly used in chemistry because it can be produced on a larger scale.

Explanation:

hopefully that helps you

Which is an example of a current research focus in chemistry?

A. applying gene therapy to treat certain diseases

B. using hook-and-loop tape in the clothing industry

C. developing smoke detectors for common use

D. studying coal combustion as an energy source

Answers

d if i’m not mistaken

Answer:

b is the correct answer

do not trust answer one

Explanation:

The pOH of an aqueous solution of 0.480 M trimethylamine (a weak base with the formula (CH3)3N) is .

Answers

Answer:

Explanation:

Kb of  (CH₃)₃N is 7.4 x 10⁻⁵

initial concentration of (CH₃)₃N   a   is .48 M

(CH₃)₃N    +   H₂O =  (CH₃)₃NH⁺  +  OH⁻

a - x                                     x               x  

x² / (a - x )  = Kb

x is far less than a so a - x can be replaced by a .

x² / a   = Kb

x²  = a x Kb = .48 x 7.4 x 10⁻⁵ = 3.55 x 10⁻⁵ = 35.5 x 10⁻⁶

x = 5.96 x 10⁻³

pOH = - log ( 5.96 x 10⁻³ )

= 3 - log 5.96

= 3 - .775

= 2.225

Other Questions
PLZ HELPWhy do the people who live in the altiplanos have large chests and lungs?They work very hard.There is very little oxygen.They have a disease.The sun is too bright. Read the excerpt from an adaptation of "To Build a Fire.When he fell down a second time, the dog curled its tail over its forefeet and sat in front of him, facing him, curiously eager and intent. The warmth and security of the animal angered him, and he cursed it till it flattened down its ears appeasingly. This time the shivering came more quickly upon the man. He was losing in his battle with the frost.The dog is "eager and intent, while the man isresentful of the dogs natural protection.frustrated by the dogs disobedience.confused by the change in temperature.satisfied with his own survival skills. Does the use of lithium cause human health problems? Salena needs to purchase 9 skirts for a new job. her friend, Jamie goes with her each of the skirts costs $41. Salena says that she can find the total cost by multiplying 9 and 4 and adding that to product of 9 and 1. Jamie disagrees and says that she needs to find the product of 9 and 40 and add that to the product of 9 and 1. Who is correct and why? Why do you think people disagree over the cause of the Civil War? The revenues budget identifies: a. expected cash flows for each product b. actual sales from last year for each product c. the expected level of sales for the company d. the variance of sales from actual for each product Need help ASAP please y=3x-5 identify y intercept within equation A Corporation has two divisions: the South Division and the West Division. The corporation's net operating income is $26,900. The South Division's divisional segment margin is $42,800 and the West Division's divisional segment margin is $29,900. What is the amount of the common fixed expense not traceable to the individual divisions How are velocity, wavelength, and frequency related When does carbon dioxide absorb the most heat energy?during freezingduring depositionduring sublimationduring condensation A chemist decomposes samples of several compounds; the masses of their constituent elements are listed. Calculate the empirical formula for each compound. a. 1.245 g Ni, 5.381 g I, b. 2.677 g Ba, 3.115 g Br, c. 2.128 g Be, 7.557 g S, 15.107 g what are some similarities between Sparta and Athens #7 If the Moons mass was suddenly tripled, what would occur to the gravitational force between the Earth and the Moon?(A) Gravitational force would increase by a factor of 3.(B) Gravitational force would decrease by a factor of 3.(C) Gravitational force would increase by a factor of 9.(D) Gravitational force would decrease by a factor of 9. How was feudalism in medieval Europe a hierarchy which of the following is an example of asexual reproduction?a. two cats having a litter of kittensb. a pair of birds has a nest full of eggs that hatch into chicksc. an amoeba undergoing mitosisd. an apple tree getting pollinated and producing fruit with seeds Which two teachers received equivalent ratios of apples from their total numberof students?Teachers, Received apples, Number of studentsBrown ---------2---------------------------------28Hearn ------------3-------------------------------------------- 42Smith -----------------3 ----------------------------------------------46Theodore -------------4---------------------------------- 48 Which agricultural society emerged between 4000 and 2400 B.C.?MesopotamiaEgyptGreeceIndiaJapanChina I don't understand this at all. Can you help me solve this please :) In which quadrant does the terminal side of your angle lie if sec theta < o and cot theta < o ?