5) Samantha added 125 mL of water to 100mL of a stock solution to make

225 mL of a 0.75 M solution. What was the molarity of the original stock

solution?

O 1.7 M.

O 0.3 M

O 0.75 M

O 3M

Which metal is too expensive to be used as a drink can?

What mass of limestone (in kg) would be required to completely neutralize a 15.5 billion-liter lake that is 1.7*10^-5 M in H2SO4 and 8.9*10^-6 M in HNO3?

List five ways you use chemistry at home or school?

2.18 Determine whether each of the following statements is true or false; if false, correct the statement to make it true: (a) The nucleus has most of the mass and compris- es most of the volume of an atom;

Why do atoms bond?

Density is not a physical property of mass. True False

Does skin have a nucleus true or false

Bacteria are only found in decaying matter. A. True B. False

Which is considered a chemical mutagen? tanning beds tobacco X-rays precious metals

Combining 0.380 mol Fe2O3 with excess carbon produced 13.7 g Fe Fe2O3 + 3C → 2Fe + 3CO What is the actual yield of iron in moles? What is the theoretical yield of iron in moles? What is the percent yield?