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? 

A pool is treated with calcium hypochlorite pool shock. If Ca(OCl)₂ has 50.0% available chlorine by mass, what ppm chlorine increase will result from the addition of 2.00 kg of pool shock to a 40.0 x 10³ L swimming pool? (density of water = 1.00 kg/L)

What is the concentration of lithium ions in 0.450 M Li₂SO₄?

Which one of the following represents the molecular equation for the reaction of NH₃ with HI?

A chemist encounters an unknown metal. They drop the metal into a graduated cylinder containing water, and find the volume change is 6.90 mL. If the metal weighs 9.84 g, what is the density of the metal in g/mL? (Just put the number and no units.) 

What quantity in moles of CH₃OH are there in 150.0 mL of 0.210 M CH₃OH?