stoichometry vocab quiz 1/11

What is a mole in chemistry?

• A mole is a type of chemical bond in molecules.
• A mole is a measure of temperature in chemistry.
• A group of atoms bundled together. A mole is a unit that represents 6.022 x 10^23 particles in chemistry.

• A mole is a unit for measuring mass in chemistry.

What is percent composition by mass?

• mass refers to the mass of a compound divided by its molecular weight.

• mass is the total mass of a compound divided by its volume.

• mass indicates the ratio of a compound's mass to its atomic number.

• The percentage that a part contributed to a whole. the percentage of the total mass of a compound that is contributed by a specific element.

Hydrate

• A crystalline ionic substance that contains a definite amount of water molecules physically associated with it.

• To add salt or seasoning.
• To freeze and preserve food.
• To remove all moisture.

anhydrous salt

• Anhydrous salt is a mineral with high moisture.
• The leftovers after water has been evaporated.

• Anhydrous salt is a type of liquid.
• Anhydrous salt contains water molecules.

Tags

NGSS.MS-PS1-1

What is percent by mass?

• How many grams of water are removed from a sample. (mass of solute / total mass of solution) x 100%

• Percent by mass = (mass of solute / mass of solvent) x 100%
• Percent by mass = (mass of solution / mass of solute) x 100%
• Percent by mass = (volume of solute / total volume of solution) x 100%

Tags

NGSS.MS-PS1-1

What is a mole ratio?

• A mole ratio is the ratio of the coefficients of two substances in a balanced chemical equation.
• A mole ratio is the temperature at which a reaction occurs.
• A mole ratio is the total mass of all reactants in a reaction.
• A mole ratio is the amount of a substance in grams.

What is avogadro's number?

• 6.022 x 10^22
• 6.022 x 10^24
• 6.022 x 10^23
• 6.022 x 10^21

Tags

NGSS.HS-PS1-7

What is gram formula mass in chemistry?

• the total number of atoms in a molecule.

• the weight of a single atom in a substance.

• the mass of one mole of a substance, calculated from its chemical formula.

• the volume occupied by one mole of gas.

What is the definition of molar mass in chemistry?

• The mass of one mole of a substance, expressed in grams per mole (g/mol).
• The average mass of all isotopes of an element, calculated in grams per mole.
• The total mass of all molecules in a solution, given in kilograms per liter.
• The weight of a single atom of an element, measured in atomic mass units.

What is stoichiometry?

• Stoichiometry is the measurement of temperature in reactions.
• Stoichiometry refers to the speed of chemical reactions.
• Stoichiometry is the study of atomic structures.
• The relationship between the quantities of reactants and products before, during, and after chemical reactions.

Tags

NGSS.HS-PS1-7