If an Alka-Seltzer tablet contained 309 mg of aspirin, #1.927 xx 10^03# mg of sodium hydrogen carbonate, and #1.004 xx 10^03#mg of citric acid and nothing else, what is the percent, by mass, of sodium hydrogen carbonate in the tablet?

Answer 1

The percent composition of sodium hydrogen carbonate #("NaHCO"_3")# in the Alka-Seltzer tablet is 59.5%.

Percent composition is determined by dividing the mass of the specified compound by the total mass, then multiply by 100.

#"Percent composition"="mass of specified component"/"total mass"xx100"#

Add the masses of the compounds.

#("309 mg")+(1.927xx10^3 "mg")+(1.004xx10^3"mg")=3.24xx10^3 "mg"#
Divide the mass of sodium hydrogen carbonate #"NaHCO"_3"# by the total mass of the tablet, then multiply by 100.
#"Percent composition of NaHCO"_3=(1.927xx10^3"mg HCO"_3)/(3.24xx10^3"mg")xx100="59.5% NaHCO"_3"#
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Answer 2

To find the percent by mass of sodium hydrogen carbonate in the tablet, divide the mass of sodium hydrogen carbonate by the total mass of the tablet and multiply by 100.

Mass of sodium hydrogen carbonate = 1.927 x 10^3 mg Total mass of tablet = 309 mg (aspirin) + 1.927 x 10^3 mg (sodium hydrogen carbonate) + 1.004 x 10^3 mg (citric acid) = 3.24 x 10^3 mg

Percent by mass of sodium hydrogen carbonate = (1.927 x 10^3 mg / 3.24 x 10^3 mg) * 100 = 59.5%

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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