Stoichiometric Calculations Answers

The molar mass of iron (III) oxide (Fe2O3) is 159.7 g/mol. What is the correct way to write the molar mass of iron oxide as a conversion factor?

The molar mass of aluminum oxide (Al2O3) is 102.0 g/mol. What is the correct way to write the inverted molar mass of aluminum oxide as a conversion factor?

What is the mass of 1.84 mol NaCl? Give your answer to the correct number of significant figures. (Molar mass of NaCl = 58.44 g/mol)1.84 mol NaCl = ⇒ 108 g NaCl

The correct calculation is shown below.Did you perform the calculation correctly?

What is the mass of 0.513 mol Al2O3? Give your answer to the correct number of significant figures. (Molar mass of Al2O3 = 102.0 g/mol)0.513 mol Al2O3 = ⇒ 52.3 g Al2O3

The correct calculation is shown below. 0.513 mole upper A l subscript 2 upper O subscript 3 with mole upper A l subscript 2 upper O subscript 3 crossed out times StartFraction 102.0 grams upper A l subscript 2 upper O subscript 3 over 1 mole upper A l subscript 2 upper O subscript 3 with mole upper A l subscript 2 upper O subscript 1 crossed out EndFraction equals 52.3 grams upper A l subscript 2 upper O subscript 3. Did you perform the calculation correctly?

The molar mass of water (H2O) is 18.02 g/mol. Yun has 0.025 mol of H2O for a laboratory experiment. How many grams of water does she have?

What is the mass of 2.50 mol of iron (II) hydroxide: Fe(OH)2?

How many moles of water (H2O) are present in a beaker containing 45.9 g H2O? Give your answer to the correct number of significant figures. (Molar mass of water = 18.02 g/mol)45.9 g H2O = mol H2O

Calculate the number of moles in 75.0 g of dinitrogen trioxide (N2O3).

The correct calculation is shown below. 45.9 grams upper H subscript 2 upper o, with grams upper H subscript 2 upper O crossed out times StartFraction 1 mole upper H subscript 2 upper O over 18.02 grams upper H subscript 2 upper O, with grams upper H subscript 2 upper O crossed out EndFraction equals 2.55 moles upper H subscript 2 upper O. Did you perform the calculation correctly? Yes, I answered it correctly.No, I used the wrong conversion factor.No, I used the correct conversion factor, but I did the math wrong.

Consider again the thermite reaction. If 0.0257 g Al react completely, what mass of Fe forms? Use the periodic table to find molar masses.Fe2O3 + 2Al Al2O3 + 2FeSelect the correct setup for this calculation.

Consider again the thermite reaction. If 0.0257 g Al react completely, what mass of Fe forms? Use the periodic table to find molar masses.Fe2O3 + 2Al Al2O3 + 2FeThe correct setup allows you to cancel terms to yield the mass of iron:What mass of Fe forms? Make sure to give your answer with the correct number of significant figures.A total of 0.0257 g Al forms g Fe.

Water (H2O) forms when hydrogen gas (H2) and oxygen gas (O2) react according to the equation below:2H2 +O2 → 2H2OWhat mass of water forms when 1.45 × 10-3 g O2 react completely? (Molar mass of O2 = 32.00 g/mol; molar mass of H2O = 18.02 g/mol)

The overall chemical reaction for photosynthesis is shown below:6CO2 + 6H2O C6H12O6 + 6O2What mass of glucose (C6H12O6) can form from 71.89 g CO2? (Molar mass of C6H12O6 = 180.18 g/mol; molar mass of CO2 = 44.01 g/mol)71.89 g CO2 = g C6H12O6

What mass of oxygen forms from 71.89 g CO2? Use the periodic table to find molar masses.71.89 g CO2 = ⇒ 52.27 g O2

Consider again the reaction for photosynthesis: 6CO2 + 6H2O [image 1] C6H12O6 + 6O2.Select the correct mole ratio to complete the calculation shown below. [image 2]

What mass of water is required to react completely with 157.35 g CO2? (Molar mass of H2O = 18.02 g/mol; molar mass of CO2 = 44.01 g/mol)157.35 g CO2 = g H2O

What mass of oxygen (O2) forms in a reaction that forms 15.90 g C6H12O6? (Molar mass of O2 = 32.00 g/mol; molar mass of C6H12O6 = 180.18 g/mol)15.90 g C6H12O6 = ⇒ 16.94 g O2

3.24 x 10–3 g NaOH1.10 x 10–2 g NaOH6.10 x 10–2 g NaOH6.50 x 10–2 g NaOH