a unit of measurement used in chemistry to express amounts of a chemical substance
What is the Mole
100
It has negative charge and almost no mass
What is electron
100
The mass of an element including all its isotopes and their abundance.
What is average atomic mass
100
The molar mass of Nickel
What is 58.71 g/mol
100
Number of moles in 80 grams of CO2
What is 1.82 mol (units!)
200
It expresses the number of elementary entities per mole of substance and it has the value 6.02×10 23 mol−1
What is the Avogadro's number
200
The number of theses particles give each element its atomic number
What is proton
200
Average atomic mass of element X
X-18 81%
X-19 3%
X-20 16%
What is 83.35 amu (must give units)
200
The molar mass of CO2
What is 44.01 g/mol
200
Number of moles in 1.48E26 molecules of Al(OH)3
What is 245.85 mol (units!!!)
300
The mass of one mole, expressed in g/mol
What is molar mass
300
Part of the atom where both protons and neutrons are found.
What is the nucleus
300
Average atomic mass of element Z
Z - 191 0.5%
Z - 192 19%
Z - 193 16.5%
Z - 194 23%
Z - 195 41%
What is 193.85 amu (must give units)
300
The molar mass of C6H12O6
What is 180.16 g/mol
300
How many Kilograms are there in 5.5 mol of H2SO4?
What is 0.54 Kg (units!!!)
400
amu
What is atomic mass unit
400
The number of electrons of an element with
atomic number=5
atomic mass= 12
Charge=negative 2
What is 7
400
Average atomic mass of element X
X - 32 10.52%
X - 34 10.04%
X - 35 59.54%
X - 37 16.72%
X - 38 calculate this value too!
What is 35.0138 amu (units)
400
The molar mass of Al2(SO4)3
What is 342.17 g/mol
400
How many molecules of Mg(OH)2 are there in 0.45 lb.?
What is 2.1E24 molecules (units!!!)
500
They share the same number of protons and differ from the others in its number of neutrons
What is isotope
500
Element that contains 56 protons, 56 electrons and has an atomic mass of 137.33 amu.
What is Barium (Ba)
500
What is the NAME and Average Atomic Mass of the element that has the following isotopes?
X - 40 97.921% X - 44 1.088%
X - 42 0.642% X - 46 0.004%
X - 43 0.135% X - 48 0.210%
What is Calcium (Ca) with 40.077 amu.
500
The molar mass BrC2H2NH2
What is 121.96 g/mol
500
How many pounds of GLUCOSE are there in 2.8E24 molecules?