For the readion 2Na + Ch> 2NaCl, how many grams of Ch are required to read completely with 450 g Na 71.6g
6.09g
3.54g
21.1g

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?

Question 5 match each term to its description. match term definition excess reactant a) reactant that can produce a lesser amount of the product limiting reactant b) reactant that can produce more of the product theoretical yield c) amount of product predicted to be produced by the given reactants