2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O 1. How many grams of water are produced from 100 grams of oxygen?
2. How many grams of water are produced from 100 grams of acetylene (C₂H₂)?
3. Given your answers to problems 4 and 5 how many grams of water are produced from 100 g each of oxygen and acetylene (C₂H₂)?

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

the dependant variable is spilled water

the independent is the heat