5a. What is the formula for sodium hydroxide? b. What is the formula mass of sodium hydroxide? c. What is the mass in grams of 0.25 mol of sodium

5a. What is the formula for sodium hydroxide?

  b. What is the formula mass of sodium hydroxide?

  c. What is the mass in grams of 0.25 mol of sodium hydroxide?

I have a test on chemical formulas and compounds tomorrow, and I really need to get this stuff down.  Thanks for the help!

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