given the following reaction: CuO (s) + H2 (g) to Cu (s) + H2O (g). If 250 L of hydrogen gas are used to reduce copper (II) oxide at STP, what mass of copper is to be expected?

A sample of CO2 gas which weighs 1.62 grams has a volume of 1.02 liters when collected at 20oC. What would be the pressure of the gas sample?

If an atom loses a proton, what happens? 1. Its mass is lowered, and it becomes a different element. 2. Its mass stays the same, and it is still the same element. 3. Its mass is lowered, but it is still the same element. 4.

How many grams of calcium are required to react with 12 grams of oxygen to form caO

Describe the correct electron dot diagrams for the first ten elements of the periodic table.

What are the characteristics of Archaebacteria? A. they are single cells that have a nucleus and tend to live in extreme conditions. B. they are single cells that lack a nucleus and tend to live in extreme conditions. C.

Which element would most likely have chemical properties similar to that of fluorine (F) ?

Percentage compostion of carbon in CaCO3

Potassium iodide (ki) exhibits predominantly ionic bonding. the k and i ions have electron structures that are identical to which two inert gases?

Amino acid to protein as?

How many moles of metallic aluminum (al) could be produced from al3 + at a current of 0.09 amperes for 964,853 seconds?