Molar Mass

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Calculate the molar mass of glucose, C₆H₁₂O₆.

180.16 g

Determine the molar mass of: methanol, CH₃OH

32.04 g

Determine the molar mass of: carbon dioxide

44.01 g

NAME THE PERSON: Discovered law of relativity

Einstein

Which of the following quantities has the smallest mass? A) 1 mol Ne B) 2 mol Al C) 3 mol C D) 4 mol He E) 5 mol H₂

5 mol H₂

The molar mass of sodium chloride is

58.44 g

Calculate the molar mass of potassium chloride, KCl. A) 74.55 g B) 54.55 g C) 6.74 g D) 67.40 g E) 19.00 g

74.55 g

The molar mass of C₃H₈O₂ (three significant figures) is A) 76.4 g B) 60.0 g C) 29.1 g D) 69.0 g E) 13.0 g

76.4 g

Determine the molar mass of: NaHCO₃

84.01 g

Determine the molar mass of: Iron(II) sulfide

87.92 g

Due to this experiment, discovered direct measurement of electron

oil drop

how do you tell how many electrons are in an element?

same as protons

atom of the same element with a different mass

isotope

atoms of an element with a different number of neutrons is a(n) _______

isotope

Mg + O -> MgO is an example of what law? (nothing is actually changing)

law of conservation of mass

States that matter can be neither destroyed nor created during ordinary chemical reactions or physical changes

law of conservation of mass

The fact that a chemical compounds contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound

law of definite proportions

what is this law: every chemical compound contains fixed and constant proportions (by mass) of its constituent elements

law of definite proportions

hydrogen's 3 isotopes: name, name, name

protium, denterium, tritium

Determine the molar mass of: CuCl₂

134.5 g

odium hydrogen phosphate, Na₂HPO₄, has a molar mass of A) 141.96 g B) 118.96 g C) 71.00 g D) 117.00 g E) 94.01 g

141.96 g

What is the molar mass, to three significant figures, of sodium phosphate, Na₃PO₄? A) 119 g B) 308 g C) 164 g D) 226 g E) 354 g

164 g

What is the mass in grams of 1.00 mol of sodium carbonate, Na₂CO₃? A) 106 g B) 100. g C) 1.00 g D) 83.0 g E) 58.0 g

106 g

Determine the molar mass of: CaCl₂

110.98 g

What is the molar mass of methyl salicylate (C₈H₈O₃), also known as oil of wintergreen?

152.14 g

Determine the molar mass of: carbon tetrachloride

153.8 g

What is the molar mass of nickel(II) sulfate, NiSO₄?

154.76 g

What is the molar mass of copper(II) sulfate, CuSO₄? A) 16.00 g B) 63.55.g C) 111.55 g D) 159.62 g E) 319.17 g

159.62 g

Determine the molar mass of: sodium fluoride

41.99 g

describe the maximum electrons for each circle in bohr's diagram (we will write this on test): __ on first __ on second __ on third

2 8 14

Determine the molar mass of: hydrogen gas, H₂

2.016 g

exactly 1/12 the mass of a carbon-12 atom

atomic mass unit

1.00 mol of neon has a mass of A) 10.0 g B) 14.0 g C) 1.00 g D) 20.2 g E) 30.2 g

20.2 g

1.00 mol of sodium has a mass of A) 23.0 g B) 0.230 g C) 0.0230 g D) 0.00230 g E) 2.30 × 10⁻⁶ g

23.0 g

What is the molar mass of Mg₃(PO₄)₂, a substance formerly used in medicine as an antacid? A) 71.32 g B) 118.3 g C) 150.3 g D) 214.3 g E) 262.9 g

262.9 g

Find the molar mass of hexachlorobenzene, C₆Cl₆. A) 107.5 g B) 47.5 g C) 4.756 g D) 284.8 g E) 28.48 g

284.8 g

Oxygen gas, O₂, has a molar mass of A) 8.000 g B) 48.00 g C) 16.00 g D) 32.00 g E) 64.00 g

32.00 g

What is the molar mass, to three significant figures, of sucrose (C₁₂H₂₂O₁₁)? A) 29.0 g B) 50.2 g C) 210 g D) 342 g E) 182 g

342 g

One mol of potassium has a mass of A) 19.00 g B) 30.98 g C) 6.022 × 10²³ g D) 39.10 g E) 31.00 g

39.10 g

Determine the molar mass of: argon gas

39.95 g

One mol of helium gas has a mass of A) 1.00 g B) 2.00 g C) 3.00 g D) 4.00 g E) 8.00 g

4.00 g

The molar mass of calcium hydroxide, Ca(OH)₂ to three significant figures, is A) 63.55 + 57.1 g B) 73.1 g C) 74.1 g D) 114 g E) 38.1 g

74.1 g

What is the molar mass of lactic acid, C₃H₆O₃? A) 90.08 g B) 29.02 g C) 180.0 g D) 90.00 g E) 45.02 g

90.08 g

Calculate the molar mass of magnesium chloride, MgCl₂. A) 24.31 g B) 95.21 g C) 125.91 g D) 59.81 g E) 70.01 g

95.21 g

NAME THE PERSON: Believed in 4 elements (earth, fire, water, air)

Aristotle

6.022 x 10^23. The number of particles in exactly one mole of a pure substance

Avogadro's number

NAME THE PERSON: Discovered electrons are in orbits around nucleus (we have to draw his model on test)

Bohr

NAME THE PERSON: Believed all matter consists of indivisible particles. Atoms of the same element are similar in shape and mass, but are different from atoms of other elements. Atoms cannot be created/destroyed and he believed atoms of different elements can combine.

Dalton

NAME THE PERSON: Believed all matter is made up of atoms or indivisible particles

Democritus

True or False 1.00 mol of hydrogen gas weighs 4.00 g.

False

True or False The molar mass of chlorine gas is 35.45 g.

False

True or False The molar mass of silver is 47 g.

False

True or False The units for molar mass are kg.

False

NAME THE PERSON: Proved atom had a nucleus (gold foil experiment)

Rutherford

NAME THE PERSON: Used mathematical equations to describe movement of electrons

Schrodinger

what is hydrogen's isotope used to cool reactors?

denterium

Volume of an atom is in the ______ ______

electron cloud

what is hyphen notation? answer like this:____-_____

element-mass

Due to this experiment, nucleus discovered

gold foil

what is this law: mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.

law of conservation of mass

if two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers

law of multiple proportions

what is this law: when two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers

law of multiple proportions

total number of protons and neutrons in the nucleus of an isotope

mass number

How do you calculate atomic mass?

mass of isotope x relative abundance

the mass of one mole of a pure substance

molar mass

the amount of a substance that contains as many particles as there are atoms in exactly 12 g of carbon-12

mole

short range proton-neutron, proton-proton and neutron-neutron forces holding the nuclear particles together

nuclear forces

Mass of the atom is in the ______

nucleus

Where are the subatomic particles protons and neutrons located in an atom?

nucleus

general term for any isotope of any element

nuclide

NAME THE PERSON: Added quantum mechanics to the atomic theory

Heisenberg

NAME THE PERSON: Discovered electron (plum pudding)

Thomson

True or False 0.100 mol of sodium chloride weighs 5.84 g

True

True or False The mass of 1.00 mol of water is 18.0 g.

True

True or False The molar mass of copper(II) chloride is 134.5 g.

True

True or False The molar mass of magnesium is 24.31 g

True

the smallest particle of an element that retains the chemical properties of that element

atom

how do you tell protons in an element?

atomic number

the number of protons in the nucleus of each atom of an element

atomic number

the weighted average of the atomic masses of naturally occurring isotopes of an element

average atomic mass

What number do we use to find out the number of particles in exactly one mole of a pure substance?

avogadro's number

atomic mass of any atom is determined by comparing it with the mass of ______ atom

carbon-12

Due to this experiment, electrons discovered

cathode ray


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