Molar Mass
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