Question

Two popular antacids tablets are tums and maalox. the active ingredient in both of these anttacids is calcium carbonate, caco3. tums regular strength tablets contain 0. 747 g and maaloz tablets contain 0. 600 g of calcium carbonate. compare the number of formula units of calcium carbonate in both tums and maalox

Answer 1

The number of formula units of CaCO₃ in Tums is 1.25 times the formula units in Maalox

Avogadro's hypothesis

1 mole of CaCO₃ = 6.02×10²³ formula units

But

1 mole of CaCO₃ = 100 g

Thus,

100 g of CaCO₃ = 6.02×10²³ formula units

How to determine the number of formula units in both tablets

For Tums

100 g of CaCO₃ = 6.02×10²³ formula units

Therefore,

0.747 g of CaCO₃ = (0.747 × 6.02×10²³) / 100

0.747 g of CaCO₃ = 4.50×10²¹ formula units

For Maalox

100 g of CaCO₃ = 6.02×10²³ formula units

Therefore,

0.6 g of CaCO₃ = (0.6 × 6.02×10²³) / 100

0.6 g of CaCO₃ = 3.61×10²¹ formula units

Comparison

• Formula units in tums = 4.50×10²¹ formula units
• Formula units in maalox = 3.61×10²¹ formula units
• Comparison =?

Comparison = Tums / Maalox

Tums / Maalox = 4.50×10²¹ / 3.61×10²¹

Tums / Maalox = 1.25

Cross multiply

Tums = 1.25 × Maalox

Learn more about Avogadro's number:

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