Answer to Question #286678 in General Chemistry for meow`-`

Question

1. The airbag is a safety device used in cars to cushion the passenger during a crash. It involves the following chemical reaction which is triggered by an impact:

2 NaN_{3 (s)} → 2 Na_(S) + 3N_{2 (g)}

       Calculate the volume of N₂ gas (measured in STP) that can be produced from 130.0 g of NaN_3.

 

1. How many liters of O_{2 (g)} at STP is needed yo completely burn 20.0 L of butane (C₄H₁₀), with this reaction?

2 C₄H_{10 (g)} + 13 O_{2 (g)} → 8 CO_{2 (g)}  + 10 H₂O _(l)

 

1. Acetylene is formed by the reaction of water with calcium carbide, according to the following equation:

CaC_{2 (s)} + 2H₂O _(l) + Ca(OH)_{2 (aq)} → C₂H_{2 (g)}

   How many grams of CaC₂ would be needed to produce 10.0 L (at STP) of acetylene

Answer 1

Number of moles NaN3= 130/65= 2

Mole ratio NaN3:N2= 2:3

= 2×3/2= 3moles

At STP, 1 mole = 22.4L

3 × 22.4L = 67.2L