How many formula units of baking soda (sodium bicarbonate) are in 2.60 tsp? (1 tsp ≈ 7.20 g nahco3)?

In 1 mole of there are formula units of .

Since, 1 tsp of is approximately 7.20 g of . Mass of 2.60 tsp of can be calculated as follows:

Thus,

Converting mass into number of moles as follows:

here, n is number of moles, m is mass and M is molar mass.

Molar mass of is 84 g/mol thus, number of moles will be:

Since,

thus,

Thus, formula units of baking soda are in 2.60 tsp.

c. is the answer

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