a is right.
b is not.
0.0457 x 58.32 = ? g
Change to mg. Wouldn't that be 2.665 x 10^3 mg. I would round that to 2.66E3 mg to make the number of significant figures correct at 3.
An antacid contains 200mg of aluminum hydroxide and 200mg of magnesium hydroxide per capsule.
a. How many moles of Al(OH)3 does each capsule contain? 2.56 x 10^-3 mol Al(OH)3 is that correct?
b. What is the mass in milligrams of 0.0457 mole of magnesium hydroxide?
2.665 x 10^-3 mg is this correct?
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