7 questions
What is the oxidation number for carbon in carbon dioxide?
2+
2-
4+
4-
What is the oxidation number of of oxygen in H2O2?
1+
1-
2+
2-
List the following in the order of most positive oxidation number of carbon to most negative oxidation number of carbon.
CO2, C, CH4
CO2, CH4, C
CO2, C, CH4
CH4, CO2, C,
CH4, C, CO2
Which of the following is not a redox reaction?
CH4 + O2 → CO2 + 2 H2O
2H2 + O2→2H2O
CaCO3 + 2 HCl → CaCl2 + H2CO3
H2 + 2 AgNO3 → 2 Ag + 2 HNO3
H2 + 2 AgNO3 → 2 Ag + 2 HNO3
Which element is being reduced in the equation above?
H
Ag
N
O
H2 + 2 AgNO3 → 2 Ag + 2 HNO3
Which element is being oxidized in the equation above?
H
Ag
N
O
2H2 + O2 --> 2H2O
If you start with 5g of hydrogen gas and 40g of oxygen gas, how many grams of water will be produced?
5
15
40
45