1. Propyl acetate C 5 H 10 O 2 gives the odor and taste to pears. How many moles

Question

1. Propyl acetate C5H10O2 gives the odor and taste to pears. How many moles of oxygen are present in 1.18 moles of propyl acetate? Propyl acetate molar mass is 102.13 grams per mole. Make sure to include the correct unit symbol with the answer choice.

2. Dinitrogren oxide, N2O, which is used in dentistry, is an anesthetic also called laughing gas. What is the pressure, in atmospheres, of 0.180 mole of N2O at 468 Kelvin in a 8.97 liter container? Make sure to include the correct unit symbol with the answer choice.

3. When acetylene, C2H2, burns in oxygen, high temperatures are produced that are used for welding metals. 2C2H2 + 5O2 --> 4CO2 + 2H2O . How many grams of carbon dioxide are produced when 59.1 grams of oxygen gas is burned?

4. How many molecules are present in 9.46 moles of carbon dioxide? The molar mass of carbon dioxide is 44.095 grams per mole.

5. Chlorine gas, Cl2 is used to purify water. How many moles of chlorine gas are in a 7.16 liter tank if the gas has a pressure of 724 millimeters of mercury and a temperature of 32 Celsius? Make sure to include the correct unit symbol with the answer choice.

Explanation / Answer

1)

1 mol of C5H10O2 has 2 mole of O

So,

moles of O = 2*number of moles of C5H10O2

= 2*1.18 mol

= 2.36 mol

Answer: 2.36 mol

2)

we have:

V = 8.97 L

n = 0.180 mol

T = 468.0 K

we have below equation to be used:

P * V = n*R*T

P * 8.97 L = 0.18 mol* 0.0821 atm.L/mol.K * 468 K

P = 0.771 atm

Answer: 0.771 atm

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