How Many Or How Much?: Question Preview (ID: 16425)


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What is the approximate mass of one mole of zinc?
a) 30 g b) 35 g c) 65 g d) 6.02 x 10^23 g
For which of the following elements is the number of neutrons correctly represented, based on the atomic number and mass number given?
a) gold: atomic number 79, mass 197, neutrons 79 b) mercury: atomic number 80, mass 201, neutrons 180 c) seaborgium: atomic number 106, mass 266, neutrons 160 d) rutherfordium: atomic number 104, mass 261, neutrons 104
For which of the following elements is the number of neutrons correctly represented, based on the atomic number and mass number given?
a) iron: atomic number 26, mass 56, neutrons 30 b) neon: atomic number 10, mass 20, neutrons 9 c) potassium: atomic number 19, mass 39, neutrons 19 d) phosphorus: atomic number 15, mass 31, neutrons 19
Isotopes of the same element have different
a) positions on the periodic table b) atomic numbers c) mass numbers d) elemental symbols
5.6 moles of gold contain how many atoms?
a) 34 atoms b) 9.3 x 10^-22 atoms c) 9.3 x 10^23 atoms d) 3.4 x 10^24 atoms
4.5 x 10^25 atoms of nikel equal how many moles?
a) 27 mol b) 2.7 x 10^48 mol c) 0.75 mol d) 75 mol
In which of the following is the number of neutrons correctly represented?
a) fluorine: atomic numbers 9, mass 19, neutrons 0 b) arsenic: atomic number 33, mass 75, neutrons 108 c) magnesium: atomic number 12, mass 24, neutrons 24 d) uranium: atomic number 92, mass 238, neutrons 146
Isotopes of the same element have different
a) numbers of neutrons b) numbers of protons c) numbers of electrons d) atomic numbers
All atoms of the same element have the same
a) number of neutrons b) number of protons c) mass numbers d) mass
How many moles of iridium are in 26.4 g of iridium?
a) 1 mol b) 1.37 x 10^-1 mol c) 5.06 x 10^3 mol d) 7.29 mol
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