I need help understanding what prefix I need to convert the quantities to. The quantities that need to be converted to a prefix are 6.5x10^10s and 4.56x10^-7 g. If possible can you explain why they go to that prefix.

8.00 grams of sodium sulfate dissolves in water. This is then reacted with 8.00grams of calcium chloride dissolved in water. Sodium chloride and another compound are the products. What is the name of the other product?

A chemist is preparing a titration which calls for 28 g of a particular acid solution, which has a density of 1.1 g/mL. What volume of the liquid should the chemist obtain?

What is the mass of 3.90 x 1021 formula units of KBr? Answer in standard notation to three significant figures.

A solution of phosphoric acid is sometimes used to acidify foods, such as jams, to give them a tangy or sour taste. Calculate the amount of phosphoric acid, in moles, that is in 32.8 mL of a 4.46 mol/L phosphoric acid solution. Record your numerical answer with the correct number of significant digits in the first answer box.  You do not need to include units as the units appear for you beside the answer box already.

Your 50 mL beaker has a mass of 5.85 g. You add 10.00 mL to the 50 mL beaker and now the total mass is 16.05 g. You originally used 5.29 g of NaCl to make the solution. What is the percent composition of your solution?

A chemist needs to neutralize a 2.6 M solution of HCI. If there are 420 mL of solution, what volume, in Liters, of a 2.0 M NaOH solution would have to be used? (Hint: You will need to write out the chemical equation and balance it first.) Be sure to report your answer to the correct number of significant figures. Do not report the units (L) in your answer.