How many moles of nitrogen gas would be produced if 3.40 moles of copper(II) oxide were reacted with excess ammonia in the following chemical reaction?  

What quantity in moles of potassium atoms do you have if you have 3.50 × 10²² atoms of potassium. (The mass of one mole of potassium is 39.10 g.)

What volume (in mL) of 0.3000 M HBr is required to neutralize 60.00 mL of 0.6000 M LiOH?

Determine the molar mass (in g/mol) of Ag₃N. Provide an answer to two decimal places.

In this reaction:     If 2.34 moles of Mg react with 3.56 moles of I₂, and 1.76 moles of MgI₂ form, what is the percent yield (in %)?

Multiply the polynomials using the distributive property or box method and combine like terms.

Determine the number of atoms in 71.0 grams of nickel, Ni. (The mass of one mole of nickel is 58.69 g.) Enter answer as X.XXEXX for scientific notation.

Which two particles of the atom have nearly identical masses? 

The density of water is approximately 1 g/cm³. Which of these substances will sink in water? 

What is the atomic symbol and mass number for an atom containing 50 protons and 64 neutrons?