Chemistry stoichiometry help plss !!! For EACH question, use dimensional analysis, mole ratios, units and labels. Round your answer to the same number of digits given in the problem. Show all your work.
Use this balanced equation for the four questions below:
C2H4 (g) + 3O2 (g) → 2CO2 (g) + 2H2O (g)

1. When 67.4 g of O2 are reacted, how many grams of carbon dioxide are produced?

2. How many grams of ethene (C2H4) are needed to produce 47.8 g of water?

PLS SHOW WORK THANKS!!

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.

Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5

What is the molar mass of the anhydrous compound? answer using four significant figures. 36.02 g/mol 120.15 g/mol 156.12 g/mol