An adult human lung has a volume of 2.9 liters. if its volume decreases to 1.2 liters and it contains 0.049 mole of air after it exhales, how many moles of air does it contain when full? a. 0.025 mol b. 0.041 mol c. 0.083 mol d. 0.12 mol e. 0.14 mol

D. 0.12

Explanation

- The lung contains 0.12 moles of air when it's full.

Solution:- At constant temperature and pressure, the volume is directly proportional to the moles of the gas.

where, and are the initial and final volumes. Similarly, and are the initial and final moles of the air.

Let's plug in the given values in the formula and solve this for initial moles of the gas.

So, the lung contains 0.12 moles of air when it's full.

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'