chemistry unit 4
what is the mass of 3.0 X 10^23 atoms of neon?
10 g
The gram formula mass of (NH4)2CO3 is
96.0g
which sample contains a total of 6.0 X 10^23
23 g Na
what is the percent composition by mass of sulfur in the compound MgSO4 (gram-formula mass=120. grams per mole)?
27%
what mass contains 6.0 X 10^23 atoms?
28 g of silicon
What is the total number of moles of sulfur atoms in 1 mole of Fe2(So4)3?
3
approx. how many atoms are there in 3.0 moles of Al?
3(6.0 X10^23)
the gram molecular mass of Ca3(PO4)2 is
310 g
what is the mass in grams of 1.00 mole of O2 gas
32.0
a sample of H2(g) at STP contains 9.03 X10^23 molecules. The volume of the sample is
33.6 liters
the volume occupied by 9.03 X10^23 molecules of N2 gas at STP is closest to
33.6 liters
what is the percent by mass of oxygen in magnesium oxide, MgO
40%
the gram formula mass of a compound is 48 grams. The mass of 1.0 mole of its compound is
48 g
what is the total mass in grams of .75 mole of S2
48g
the volume of 16.0 grams of SO2(g) at STP is closest to
5.60 liters
the gram formula mass of NH4Cl is
53.5 g/mol
what is the total number molecules of SO2 in a 0.10 mole sample of SO2?
6.0 X 10^22
the gram atomic mass of oxygen is 16.0 grams per mole. How many atoms of oxygen does this mass represent?
6.02 X 10^23
what is the gram formula mass of Ca(OH)2
74 g
what is the total number of moles of hydrogen atoms contained in 1 mole of (NH4)2C2O4?
8
what is the gram molecular mass of 1 mole of C3H5(OH)3
92 g
one mole of O2 has approximately the same mass as one mole of
S
which quantity of particles is correctly represented by the formula H2SO4
1 mole of molecules
what is the total number of atoms contained in 2.00 moles of nickel?
1.20 X 10^24
what is the total number of molecules of hydrogen in 0.25 mole of hydrogen?
1.5 X 10^23
what quantity is equivalent to 39 grams of LiF
1.5 moles
what is the number of moles of N2(g) that contains 9.03 X 10^23 molecules?
1.50
the total number of sodium atoms in 46.0 grams of sodium is
12 X 10^23
the percent composition by mass of nitrogen in NH4OH (gram-formula mass = 35 grams/mole) is equal to
14/35 X 100
which sample of O2 contains a total of 3.01 X10^23 molecules at STP?
16.0 grams
The mass in grams of 1.00 mole of CaSO4 x 2H2O is
172 g
what is the total number of atoms in 1.0 mole of CO2
18 X 10^23
what is the total mass of 3.01 X 10^23 atoms of helium gas?
2.00 g
what is the total number of moles contained in 115 g of C2H5OH
2.50
what is the percent by mass of water present in 1 mole of CaSO4 X 2H20
21%
At STP, what is the total volume occupied by a 2.00 gram sample of H2(g)?
22.4 L
in which compound is the percent composition by mass of chlorine equal to 42%
HClO3 (gram-formula mass = 84 g/mol)
which substance has the greatest molecular mass
I2
one mole of which substance contains a total of 6.02 X 10^23 atoms?
Li
the sum of the atomic masses of the atoms in one molecule of C3H6Br2 is called the
formula mass
