Shaq Is A Cavalier
New member
1. The species
25
Mg2+
12
contains:
a) 12 protons and 12 electrons
b) 14 protons and 12 electrons
c) 10 protons and 12 electrons
d) 12 protons and 14 electrons
e) 12 protons and 10 electrons
2.) What is the symbol for the bisulfite ion?
a) HSO42-
b) H2SO4-
c) HSO3-
d) HSO32-
e) HSO4-
3.) Silver "tarnish" is silver (I) sulfide. What is its formula?
a) AgSO4
b) AgS
c) Ag2SO4
d) Ag2S
e) AgS2
4.) Consider the formulas SIBr4 and SiBr4. These symbols represent species:
a) having the same composition.
b) having the same molar mass.
c) having equal numbers of atoms.
d) none of the above are correct.
e) which are identical.
5.) What is the chemical name of BaSO4?
a) Barium sulfate
b) Barium sulfur
c) Barium sulfite
d) Barium sulfide
e) Barium sulfoxide
6.) What is the chemical name of Fe3 (PO4)2?
a) Iron (II) phosphate
b) Iron (III) phosphite
c) Iron (II) phosphide
d) Iron (II) phosphite
e) Iron (III) phosphate
7.) The correct symbol for potassium is:
a) P
b) Ka
c) K
d) Po
e) Pt
8.) The calcium ion is the major cation within bones. The atomic number and atomic weight of calcium are 20 and 40.08. How many electrons does the calcium ion contain?
a) 20
b) 40
c) 22
d) 18
e) 38
9.) What is the chemical formula for vanadium (V) oxide?
a) V2O5
b) V2O3
c) VO5
d) V5O2
e) V5O
10.) What is the chemical formula for scandium (III) phosphide?
a) ScP
b) Sc3P
c) Sc2P3
d) Sc3P2
e) ScP3
11.) What is the chemical name of Cd(HCO3)2?
a) Cadmium bicarbonate
b) Cadmium carbonate
c) Calcium carbonite
d) Calcium bicarbonite
12.) Which of the following is the correct formula for a compound of aluminum and oxygen?
a) AlO
b) AlO2
c) Al2O
d) Al3O2
e) Al2O3
13.) Which of the following is the correct formula for a compound of scandium and bromine?
a) ScBr
b) Sc2Br
c) ScBr2
d) Sc2Br3
e) ScBr3
14.) Which of the following is the correct formula for a compound of germanium and oxygen?
a) GeO4
b) GeO
c) Ge2O
d) Ge3O2
e) GeO2
15.) The formula of an iodate of lanthanum is La(IO3)3. What is the formula of the sulfate of lanthanum with the same oxidation number?
a) La2(SO4)3
b) La(SO4)3
c) La3SO4
d) La2SO4
e) La3(SO4)2
16.) Neodymium chromate is Nd2(CrO4)3. What are the formulas of neodymium nitrate and neodymium phosphate.
a) Nd(NO3)3, NdPO4
b) Nd3(NO3)2, NdPO4
c) Nd(NO3)3, Nd3(PO4)2
d) Nd2(NO3)3, Nd2(PO4)3
e) Nd(NO3)3, Nd3PO4
17.) Magnesium (Atomic weight 24.305) has three naturally-occurring isotopes with isotopic weights 23.98504, 24.98584 and 25.98259. The abundance of the lightest isotope is 78.70%. What is the percentage abundance of the heaviest isotope?
a) 9.22
b) 7.43
c) 8.67
d) 10.71
e) 10.17
18.) The oxide of an unknown element has the formula X2O3. Heating a 4.260 g sample of the compound decomposes it completely to form 0.439 g of O2 Find the atomic weight of the unknown element.
(Atomic weight: O = 16.00).
a) 209
b) 39.0
c) 108
d) 88.9
e) 63.5
19.) Which of the following organic compounds has the lowest molecular weight?
(Atomic weights: C = 12.01, O = 16.00, N = 14.01, H = 1.008).
a) C5H8FO2
b) C3H6F2O3
c) C3H5F3O2
d) C4H7FO3
e) C4H8F2O2
20.) Quinine, a antimalarial drug, is 8.63% nitrogen. There are two nitrogen atoms per molecule. What is the molecular weight of quinine?
(Atomic weight: N = 14.01).
a) 331
b) 162
c) 327
d) 325
e) 321
If you can't answer all of them, you can answer some. And I will give you points. Thank you.
25
Mg2+
12
contains:
a) 12 protons and 12 electrons
b) 14 protons and 12 electrons
c) 10 protons and 12 electrons
d) 12 protons and 14 electrons
e) 12 protons and 10 electrons
2.) What is the symbol for the bisulfite ion?
a) HSO42-
b) H2SO4-
c) HSO3-
d) HSO32-
e) HSO4-
3.) Silver "tarnish" is silver (I) sulfide. What is its formula?
a) AgSO4
b) AgS
c) Ag2SO4
d) Ag2S
e) AgS2
4.) Consider the formulas SIBr4 and SiBr4. These symbols represent species:
a) having the same composition.
b) having the same molar mass.
c) having equal numbers of atoms.
d) none of the above are correct.
e) which are identical.
5.) What is the chemical name of BaSO4?
a) Barium sulfate
b) Barium sulfur
c) Barium sulfite
d) Barium sulfide
e) Barium sulfoxide
6.) What is the chemical name of Fe3 (PO4)2?
a) Iron (II) phosphate
b) Iron (III) phosphite
c) Iron (II) phosphide
d) Iron (II) phosphite
e) Iron (III) phosphate
7.) The correct symbol for potassium is:
a) P
b) Ka
c) K
d) Po
e) Pt
8.) The calcium ion is the major cation within bones. The atomic number and atomic weight of calcium are 20 and 40.08. How many electrons does the calcium ion contain?
a) 20
b) 40
c) 22
d) 18
e) 38
9.) What is the chemical formula for vanadium (V) oxide?
a) V2O5
b) V2O3
c) VO5
d) V5O2
e) V5O
10.) What is the chemical formula for scandium (III) phosphide?
a) ScP
b) Sc3P
c) Sc2P3
d) Sc3P2
e) ScP3
11.) What is the chemical name of Cd(HCO3)2?
a) Cadmium bicarbonate
b) Cadmium carbonate
c) Calcium carbonite
d) Calcium bicarbonite
12.) Which of the following is the correct formula for a compound of aluminum and oxygen?
a) AlO
b) AlO2
c) Al2O
d) Al3O2
e) Al2O3
13.) Which of the following is the correct formula for a compound of scandium and bromine?
a) ScBr
b) Sc2Br
c) ScBr2
d) Sc2Br3
e) ScBr3
14.) Which of the following is the correct formula for a compound of germanium and oxygen?
a) GeO4
b) GeO
c) Ge2O
d) Ge3O2
e) GeO2
15.) The formula of an iodate of lanthanum is La(IO3)3. What is the formula of the sulfate of lanthanum with the same oxidation number?
a) La2(SO4)3
b) La(SO4)3
c) La3SO4
d) La2SO4
e) La3(SO4)2
16.) Neodymium chromate is Nd2(CrO4)3. What are the formulas of neodymium nitrate and neodymium phosphate.
a) Nd(NO3)3, NdPO4
b) Nd3(NO3)2, NdPO4
c) Nd(NO3)3, Nd3(PO4)2
d) Nd2(NO3)3, Nd2(PO4)3
e) Nd(NO3)3, Nd3PO4
17.) Magnesium (Atomic weight 24.305) has three naturally-occurring isotopes with isotopic weights 23.98504, 24.98584 and 25.98259. The abundance of the lightest isotope is 78.70%. What is the percentage abundance of the heaviest isotope?
a) 9.22
b) 7.43
c) 8.67
d) 10.71
e) 10.17
18.) The oxide of an unknown element has the formula X2O3. Heating a 4.260 g sample of the compound decomposes it completely to form 0.439 g of O2 Find the atomic weight of the unknown element.
(Atomic weight: O = 16.00).
a) 209
b) 39.0
c) 108
d) 88.9
e) 63.5
19.) Which of the following organic compounds has the lowest molecular weight?
(Atomic weights: C = 12.01, O = 16.00, N = 14.01, H = 1.008).
a) C5H8FO2
b) C3H6F2O3
c) C3H5F3O2
d) C4H7FO3
e) C4H8F2O2
20.) Quinine, a antimalarial drug, is 8.63% nitrogen. There are two nitrogen atoms per molecule. What is the molecular weight of quinine?
(Atomic weight: N = 14.01).
a) 331
b) 162
c) 327
d) 325
e) 321
If you can't answer all of them, you can answer some. And I will give you points. Thank you.