Consider the following chemistry equation: 2C2H6 + 7O2 --> 6H2O + 4CO2 How many grams of water can be produced from 13.5 grams of C2H6?

24.3 grams H2O
2.70 grams H2O
67.5 grams H2O
47.1 grams H2O

Consider the following chemical reaction:
H2 + O2 --> H2O
How many liters of oxygen gas is needed to produce 2.73 liters of water vapor?
22.4 liters O2
30.6 liters O2
5.46 liters O2
1.37 liters O2

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?