6. Chemical Reactions & Quantities

How many O atoms of mass 15.99 amu are in 15.99 g of oxygen?

Calcium citrate, Ca(C₆H₅O₇)₂(MW = 498.5 amu), is a common dietary supplement to provide calcium needed for strong teeth and bones.

b. What mass of calcium citrate would be needed to provide the recommended daily intake of calcium?

Obtain a bottle of aspirin and identify the amount of active ingredient (acetylsalicylic acid, C₉H₈O₄) per tablet.

a. How many moles of aspirin are in one tablet?

Pyrite, also known as fool's gold, is used commercially to produce SO₂ used in the production of paper products.

b. How many moles of SO₂ can be produced from 1.0 kg of pyrite?

Using the models of the molecules (black = C, white = H, yellow = S, green = Cl), determine each of the following for models of compounds 1 and 2:

d. number of moles in 10.0 g

Using the models of the molecules (black = C, white = H, yellow = S, red = O), determine each of the following for models of compounds 1 and 2:

c. number of moles in 10.0 g

Ibuprofen, an anti-inflammatory drug in Advil, has the formula C₁₃H₁₈O₂.

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d. How many moles of ibuprofen contain 1.22 × 10²³ atoms of C?

What is the mass (in grams) of 6.02 × 10²³ atoms of Carbon-12?

What is the mass (in amu and in grams) of a single atom of Carbon-12?

Ammonium sulfate, (NH₄)₂SO₄, is used in fertilizers to provide nitrogen for the soil.

c. How many moles of ammonium sulfate contain 7.4 × 10²⁵ atoms of N?

Ammonium sulfate, (NH₄)₂SO₄, is used in fertilizers to provide nitrogen for the soil.

b. How many H atoms are in 0.100 mole of ammonium sulfate?

Ammonium sulfate, (NH₄)₂SO₄, is used in fertilizers to provide nitrogen for the soil.

a. How many formula units are in 0.200 mole of ammonium sulfate?