Calculate the percentage by mass of the active ingredient in an antacid tablet that weighs 1.36 g if it contains 520 mg of calcium carbonate.
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Q62: Rewrite the following as ordinary numbers:
A)6.75 ×
Q63: Perform the following mathematical operations. Give the
Q64: Calculate the following percentages.
A)30% of 300
B)7.5% of
Q65: Perform the following conversions within the metric
Q66: Perform the following conversions.
A)56 cm = _
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A)74.6 cal
B)1.45
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