Unit 7 Quiz 4

25 July 2022
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question
What is the molar mass of Al2(SO4)3? 150.03 g/mol 278.03 g/mol 342.17 g/mol 450.09 g/mol
answer
342.17 g/mol
question
How are a mole and a dozen similar? Each represents a certain mass of material. Each names a given number of objects. Each identifies a specific volume. Each measures a given number of amus.
answer
Each names a given number of objects.
question
Which value gives the number of particles in 1 mol of a substance? 6.02 mc012-1.jpg 1021 6.02 mc012-2.jpg 1022 6.02 mc012-3.jpg 1023 6.02 mc012-4.jpg 1024
answer
6.02 mc012-3.jpg 1023
question
In a classroom, which comparison would a teacher most likely use for describing a mole? a cup of water and a liter of oil a dozen eggs and a dozen jellybeans a jar of jellybeans and a gram of salt crystals 20 marbles in a bag and 10 large ice cubes
answer
a dozen eggs and a dozen jellybeans
question
What is Avogadro's number? the number of atoms in exactly 14.00 g of carbon-12 the number of atoms in a kilogram of any substance the number of atoms, molecules, ions, formula units, or other particles in a mole of a substance the number of atoms, molecules, ions, formula units, or other particles in a gram of a substance
answer
the number of atoms, molecules, ions, formula units, or other particles in a mole of a substance
question
Consider the equation below. Na+ + Cl- mc013-1.jpg NaCl Which statement best describes the relationship between the substances in the equation? The number of sodium ions is equal to the number of formula units of salt. The number of sodium ions is less than the number of chloride ions. The number of chloride ions is less than the number of formula units of salt. The number of sodium ions is two times the number of formula units of salt.
answer
The number of sodium ions is equal to the number of formula units of salt.
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Which statement best describes a mole? It is 12 units of a given substance. It contains 6.02 mc001-1.jpg 1023 grams of sodium chloride. It is the mass of 12 carbon atoms. It contains 6.02 mc001-2.jpg 1023 particles of a given substance.
answer
It contains 6.02 mc001-2.jpg 1023 particles of a given substance.
question
What is the molar mass of CHCl3? 48.47 g/mol 83.92 g/mol 119.37 g/mol 121.39 g/mol
answer
119.37 g/mol
question
The mole concept will most likely be used in........ calculating the average height of a mountain range. measuring how many liters of gasoline are poured into a tank. determining how many ozone molecules are lost in the atmosphere. finding the mass of a piece of steak in a butcher shop.
answer
determining how many ozone molecules are lost in the atmosphere.
question
What is the molar mass of a substance? the mass in grams of one mole of a substance the number of particles in one gram of a substance the number of moles in one gram of a substance the mass in grams of one particle of a substance
answer
the mass in grams of one mole of a substance