A 5.00 L container is filled with N2 gas to a pressure of 3.00 atm at 250 celcius What is the volume of the container that is used to store the same gas at STP ?

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

they are made of gases.

they have a spherical shape.

they make energy through fusion.