Moles

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What is a mole in chemistry?

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A mole is a unit of measurement used to express the amount of a substance. It is defined as the amount of substance that contains as many entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.

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How do you calculate the molar mass of a compound?

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To calculate the molar mass of a compound, sum the atomic masses of all the atoms in its chemical formula, using the periodic table.

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What is the molar mass of Calcium Chloride (CaCl2)?

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The molar mass of CaCl2 is approximately 110.98 g/mol (40.08 g/mol for Ca and 35.45 g/mol for each Cl).

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How many grams are in 1 mole of water (H2O)?

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1 mole of water (H2O) has a mass of approximately 18.02 grams.

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What is the formula to convert grams to moles?

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The formula to convert grams to moles is: Moles = Mass (g) / Molar Mass (g/mol).

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How many moles are in 24 grams of carbon (C)?

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There are 2 moles of carbon in 24 grams, since the molar mass of carbon is 12 g/mol.

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What is the significance of Avogadro's number?

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Avogadro's number (6.022 x 10^23) is the number of particles in one mole of a substance, allowing for the conversion between moles and number of particles.

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How do you balance a chemical equation?

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To balance a chemical equation, adjust the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides.

Tags

NGSS.HS-PS1-7

Front

What is the balanced equation for the reaction of aluminum and oxygen to form aluminum oxide?

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The balanced equation is: 4 Al + 3 O2 → 2 Al2O3.

Tags

NGSS.HS-PS1-7

Front

How many moles are in 13.5 grams of Beryllium (Be)?

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There are approximately 1.498 moles of Beryllium in 13.5 grams, since the molar mass of Be is about 9.012 g/mol.