Molar Mass and Mass Determination

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Questions and Answers

What is the molar mass of water (H₂O)?

  • 18 g/mol (correct)
  • 20 g/mol
  • 16 g/mol
  • 34 g/mol

What is the molar mass of carbon dioxide (CO₂)?

  • 32 g/mol
  • 28 g/mol
  • 44 g/mol (correct)
  • 12 g/mol

What is the molar mass of sodium chloride (NaCl)?

  • 23 g/mol
  • 35.5 g/mol
  • 58.5 g/mol (correct)
  • 40 g/mol

What is the molar mass of sulfuric acid (H₂SO₄)?

<p>98 g/mol (A)</p> Signup and view all the answers

What is the molar mass of methane (CH₄)?

<p>16 g/mol (C)</p> Signup and view all the answers

How many grams are in 2.5 moles of sodium (Na)?

<p>57.5 g (B)</p> Signup and view all the answers

If you have 3.6 moles of oxygen (O₂), what is the mass in grams?

<p>115.2 g (B)</p> Signup and view all the answers

What is the mass of 0.75 moles of copper (Cu)?

<p>47.66 g (D)</p> Signup and view all the answers

How much does 4.5 moles of nitrogen gas (N₂) weigh?

<p>126 g (D)</p> Signup and view all the answers

Determine the mass of 6.3 moles of iron (Fe).

<ol start="352"> <li>g (A)</li> </ol> Signup and view all the answers

How many grams are in 7.0 moles of methane (CH₄)?

<p>112 g (B)</p> Signup and view all the answers

Convert 0.6 moles of water (H₂O) to grams.

<p>10.8 g (B)</p> Signup and view all the answers

How many grams are in 2.3 moles of carbon dioxide (CO₂)?

<p>101.2 g (A)</p> Signup and view all the answers

Convert 5.0 moles of sodium chloride (NaCl) into grams.

<p>292.5 g (B)</p> Signup and view all the answers

If you have 8.2 moles of ammonia (NH₃), what is the mass in grams?

<p>139.4 g (C)</p> Signup and view all the answers

How many moles are in 28.0 grams of nitrogen gas (N₂)?

<p>1 mole (D)</p> Signup and view all the answers

Convert 72.0 grams of carbon dioxide (CO₂) to moles.

<p>1.64 moles (A)</p> Signup and view all the answers

If you have 58.5 grams of sodium chloride (NaCl), how many moles do you have?

<p>1 mole (B)</p> Signup and view all the answers

How many moles are in 40.0 grams of sulfur dioxide (SO₂)?

<p>0.625 moles (A)</p> Signup and view all the answers

Convert 88.0 grams of calcium carbonate (CaCO₃) to moles.

<p>0.88 moles (B)</p> Signup and view all the answers

How many moles are in 16.0 grams of methane (CH₄)?

<p>1 mole (A)</p> Signup and view all the answers

How many molecules are in 10.0 grams of carbon dioxide (CO₂)?

<p>$1.37 \times 10^{23}$ (B)</p> Signup and view all the answers

If you have 5.0 grams of oxygen gas (O₂), how many molecules are present?

<p>$9.4 \times 10^{22}$ (B)</p> Signup and view all the answers

How many molecules are in 50.0 grams of hydrogen (H₂)?

<p>$1.5 \times 10^{25}$ (A)</p> Signup and view all the answers

How many grams are in $3.0 \times 10^{23}$ molecules of water (H₂O)?

<p>9 g (C)</p> Signup and view all the answers

Calculate the mass in grams of $4.5 \times 10^{24}$ molecules of carbon dioxide (CO₂).

<p>330 g (B)</p> Signup and view all the answers

How many grams are in $1.2 \times 10^{22}$ molecules of methane (CH₄)?

<p>0.32 g (C)</p> Signup and view all the answers

Calculate the mass in grams of $2.0 \times 10^{23}$ molecules of sodium chloride (NaCl).

<p>19.4 g (B)</p> Signup and view all the answers

How many grams are in $6.022 \times 10^{23}$ molecules of sulfuric acid (H₂SO₄)?

<p>98 g (C)</p> Signup and view all the answers

How many grams are in $3.5 \times 10^{22}$ molecules of potassium iodide (KI)?

<p>9.7 g (A)</p> Signup and view all the answers

Calculate the mass of $1.0 \times 10^{24}$ molecules of hydrogen peroxide (H₂O₂) in grams.

<p>56.5 g (B)</p> Signup and view all the answers

Calculate the mass in grams of $4.0 \times 10^{23}$ molecules of glucose (C₆H₁₂O₆).

<p>120 g (D)</p> Signup and view all the answers

How many moles are in $2.5 \times 10^{23}$ molecules of methane (CH₄)?

<p>0.415 moles (A)</p> Signup and view all the answers

Calculate the number of moles in $1.5 \times 10^{24}$ molecules of water (H₂O).

<p>2.5 moles (D)</p> Signup and view all the answers

How many moles are in $3.0 \times 10^{22}$ molecules of sodium chloride (NaCl)?

<p>0.05 moles (B)</p> Signup and view all the answers

Determine the number of moles in $6.022 \times 10^{23}$ molecules of carbon dioxide (CO₂).

<p>1 mole (C)</p> Signup and view all the answers

How many moles are in $8.0 \times 10^{23}$ molecules of sulfuric acid (H₂SO₄)?

<p>1.33 moles (B)</p> Signup and view all the answers

Calculate the number of moles in $1.0 \times 10^{23}$ molecules of hydrogen (H₂).

<p>0.166 moles (B)</p> Signup and view all the answers

How many moles are in $7.8 \times 10^{24}$ molecules of ammonia (NH₃)?

<p>12.95 moles (A)</p> Signup and view all the answers

How many grams are in 10 grams of water (H₂O)?

<p>$3.35 \times 10^{23}$ (C)</p> Signup and view all the answers

How many molecules are in 75 grams of methane (CH₄)?

<p>$2.8 \times 10^{24}$ (B)</p> Signup and view all the answers

Flashcards

What is molar mass?

The sum of atomic masses of all atoms in a molecule.

What is the molar mass of water (H₂O)?

Approximately 18.015 g/mol.

What is the molar mass of carbon dioxide (CO₂)?

Approximately 44.01 g/mol.

What is the molar mass of sodium chloride (NaCl)?

Approximately 58.44 g/mol.

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What is the molar mass of sulfuric acid (H₂SO₄)?

Approximately 98.08 g/mol.

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What is the molar mass of ammonium nitrate (NH₄NO₃)?

Approximately 80.04 g/mol.

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What is the molar mass of glucose (C₆H₁₂O₆)?

Approximately 180.16 g/mol.

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What is the molar mass of methane (CH₄)?

Approximately 16.04 g/mol.

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What is the molar mass of potassium hydroxide (KOH)?

Approximately 56.11 g/mol.

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What is the molar mass of calcium carbonate (CaCO₃)?

Approximately 100.09 g/mol.

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What is the molar mass of aluminum sulfate (Al₂(SO₄)₃)?

Approximately 342.15 g/mol.

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How to calculate mass in grams?

Molar mass x number of moles.

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How many grams are in 2.5 moles of sodium (Na)?

Approximately 57.5 grams.

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If you have 3.6 moles of oxygen (O₂), what is the mass in grams?

Approximately 115.2 grams.

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Calculate the mass of 0.25 moles of potassium nitrate (KNO₃).

Approximately 25.28 grams.

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What is the mass of 0.75 moles of copper (Cu)?

Approximately 47.62 grams.

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How many grams are in 0.5 moles of hydrogen (H₂)?

Approximately 1.0 grams.

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If you have 1.2 moles of magnesium (Mg), what is the mass in grams?

Approximately 29.16 grams.

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How much does 4.5 moles of nitrogen gas (N₂) weigh?

Approximately 126.1 grams.

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Calculate the mass of 3 moles of aluminum (Al).

Approximately 80.94 grams.

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How many grams are in 0.02 moles of sulfur dioxide (SO₂)?

Approximately 1.28 grams.

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Determine the mass of 6.3 moles of iron (Fe).

Approximately 352.8 grams.

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What is the relation between moles and mass?

1 mole = molar mass in grams

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How many grams are in 7.0 moles of methane (CH₄)?

Approximately 112.28 grams.

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Convert 0.6 moles of water (H₂O) to grams.

Approximately 10.8 grams.

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How many grams are in 2.3 moles of carbon dioxide (CO₂)?

Approximately 101.2 grams.

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Convert 5.0 moles of sodium chloride (NaCl) into grams.

Approximately 292.2 grams.

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How many grams are in 1.5 moles of potassium iodide (KI)?

Approximately 249 grams.

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If you have 8.2 moles of ammonia (NH₃), what is the mass in grams?

Approximately 139.46 grams.

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How many grams are in 4.0 moles of sulfuric acid (H₂SO₄)?

Approximately 392.3 grams.

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Convert 0.75 moles of calcium hydroxide (Ca(OH)₂) to grams.

Approximately 55.5 grams.

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How many grams are in 1.0 mole of zinc (Zn)?

Approximately 65.4 grams.

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Convert 3.0 moles of magnesium chloride (MgCl₂) to grams.

Approximately 285.3 grams.

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How to convert grams to moles.

Moles = grams / molar mass.

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How many moles are in 28.0 grams of nitrogen gas (N₂)?

Approximately 1.0 mole.

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Convert 72.0 grams of carbon dioxide (CO₂) to moles.

Approximately 1.64 moles.

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If you have 58.5 grams of sodium chloride (NaCl), how many moles do you have?

Approximately 1.0 mole.

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How many moles are in 40.0 grams of sulfur dioxide (SO₂)?

Approximately 0.625 moles.

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Convert 88.0 grams of calcium carbonate (CaCO₃) to moles.

Approximately 0.88 moles.

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Study Notes

Molar Mass Calculation

  • The molar mass of water (H₂O) needs to calculated.
  • The molar mass of carbon dioxide (CO₂) needs to calculated.
  • The molar mass of sodium chloride (NaCl) needs to calculated.
  • The molar mass of sulfuric acid (H₂SO₄) needs to be calculated.
  • The molar mass of ammonium nitrate (NH₄NO₃) needs to be calculated.
  • The molar mass of glucose (C₆H₁₂O₆) needs to be calculated.
  • The molar mass of methane (CH₄) needs to be calculated.
  • The molar mass of potassium hydroxide (KOH) is required.
  • The molar mass of calcium carbonate (CaCO₃) needs to be calculated.
  • The molar mass of aluminum sulfate (Al₂(SO₄)₃) needs to be determined.

Mass Determination

  • The number of grams in 2.5 moles of sodium (Na) needs to be determined.
  • The mass in grams of 3.6 moles of oxygen (O₂) needs to be calculated.
  • The mass of 0.25 moles of potassium nitrate (KNO₃) needs to be calculated.
  • The mass of 0.75 moles of copper (Cu) needs to be determined.
  • The number of grams in 0.5 moles of hydrogen (H₂) needs to be determined.
  • The mass in grams of 1.2 moles of magnesium (Mg) needs to be determined.
  • The weight of 4.5 moles of nitrogen gas (N₂) needs to be calculated.
  • The mass of 3 moles of aluminum (Al) needs to be calculated.
  • The number of grams in 0.02 moles of sulfur dioxide (SO₂) needs to be determined.
  • The mass of 6.3 moles of iron (Fe) needs to be determined.

Moles to Grams

  • The number of grams in 7.0 moles of methane (CH₄) needs to be determined.
  • 0.6 moles of water (H₂O) needs to be converted to grams.
  • The number of grams in 2.3 moles of carbon dioxide (CO₂) needs to be determined.
  • 5.0 moles of sodium chloride (NaCl) needs to be converted into grams.
  • The number of grams in 1.5 moles of potassium iodide (KI) needs to be determined.
  • The mass in grams of 8.2 moles of ammonia (NH₃) needs to be determined.
  • The number of grams in 4.0 moles of sulfuric acid (H₂SO₄) needs to be determined.
  • 0.75 moles of calcium hydroxide (Ca(OH)₂) needs to be converted to grams.
  • The number of grams in 1.0 mole of zinc (Zn) needs to be determined.
  • 3.0 moles of magnesium chloride (MgCl₂) needs to be converted to grams.

Grams to Moles

  • The number of moles in 28.0 grams of nitrogen gas (N₂) needs to be determined.
  • 72.0 grams of carbon dioxide (CO₂) needs to be converted to moles.
  • The number of moles in 58.5 grams of sodium chloride (NaCl) needs to be determined.
  • The number of moles in 40.0 grams of sulfur dioxide (SO₂) needs to be determined.
  • 88.0 grams of calcium carbonate (CaCO₃) needs to be converted to moles.
  • The number of moles in 16.0 grams of methane (CH₄) needs to be determined.
  • 5.0 grams of water (H₂O) needs to be converted into moles.
  • The number of moles in 53.0 grams of magnesium (Mg) needs to be determined.
  • The number of moles in 18.0 grams of hydrogen peroxide (H₂O₂) needs to be determined.
  • 9.0 grams of potassium nitrate (KNO₃) needs to be converted into moles.

Grams to Molecules

  • The number of molecules in 10 grams of water (H₂O) needs to be calculated.
  • The number of molecules in 50 grams of carbon dioxide (CO₂) needs to be calculated.
  • The number of molecules in 75 grams of methane (CH₄) needs to be calculated.
  • The number of molecules in 30 grams of sodium chloride (NaCl) needs to be calculated.
  • The number of molecules in 40 grams of sulfuric acid (H₂SO₄) needs to be calculated.
  • The number of molecules in 60 grams of ammonia (NH₃) needs to be calculated.
  • The number of molecules in 80 grams of potassium iodide (KI) needs to be calculated.
  • The number of molecules in 25 grams of hydrogen peroxide (H₂O₂) needs to be calculated.
  • The number of molecules in 100 grams of calcium carbonate (CaCO₃) needs to be calculated.
  • The number of molecules in 12 grams of glucose (C₆H₁₂O₆) needs to be calculated.

Molecules to Grams

  • The number of grams in 3.0 x 10^23 molecules of water (H₂O) is required.
  • The mass in grams of 4.5 x 10^24 molecules of carbon dioxide (CO₂) needs to be calculated.
  • The number of grams in 1.2 x 10^22 molecules of methane (CH₄) needs to be determined.
  • The mass in grams of 2.0 x 10^23 molecules of sodium chloride (NaCl) needs to be calculated.
  • The number of grams in 6.022 x 10^23 molecules of sulfuric acid (H₂SO₄) needs to be determined.
  • The mass in grams of 5.5 x 10^23 molecules of ammonia (NH₃) needs to be calculated.
  • The number of grams in 3.5 x 10^22 molecules of potassium iodide (KI) needs to be determined.
  • The mass of 1.0 x 10^24 molecules of hydrogen peroxide (H₂O₂) in grams needs to be calculated.
  • The number of grams in 7.8 x 10^23 molecules of calcium carbonate (CaCO₃) needs to be determined.
  • The mass in grams of 4.0 x 10^23 molecules of glucose (C₆H₁₂O₆) needs to be calculated.

Molecules to Moles

  • The number of moles in 2.5 x 10^23 molecules of methane (CH₄) needs to be determined.
  • The number of moles in 1.5 x 10^24 molecules of water (H₂O) needs to be calculated.
  • The number of moles in 3.0 x 10^22 molecules of sodium chloride (NaCl) needs to be determined.
  • The number of moles in 6.022 x 10^23 molecules of carbon dioxide (CO₂) needs to be determined.
  • The number of moles in 8.0 x 10^23 molecules of sulfuric acid (H₂SO₄) needs to be determined.
  • The number of moles in 4.5 x 10^22 molecules of potassium nitrate (KNO₃) needs to be determined.
  • The number of moles in 1.0 x 10^23 molecules of hydrogen (H₂) needs to be calculated.
  • The number of moles in 7.8 x 10^24 molecules of ammonia (NH₃) needs to be determined.
  • The number of moles in 9.0 x 10^22 molecules of calcium hydroxide (Ca(OH)₂) needs to be calculated.
  • The number of moles in 2.0 x 10^25 molecules of glucose (C₆H₁₂O₆) needs to be determined.

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