Question 1. which of the following is not an example of a polymer?
a) plastic
b) nylon
c) amino acid
d) polystyrene
question 2. a carbon atom is able to form four single covalent bonds because it
a) has four electrons and four protons.
b) has four valence electrons in its outermost energy level.
c) forms a polyatomic ion with a -4 charge.
d) forms a more stable isotope when it gains four more electrons.
question 3. an organic compound that contains a carbonyl group with a hydroxyl group attached to it is an example of a(n)
a) ester.
b) alcohol.
c) amine.
d) carboxylic acid.
question 4. all of the following release carbon into the atmosphere except the
a) combustion of fossil fuels.
b) cellular respiration of plants and animals.
c) burning of trees in deforestation.
d) sedimentation of dead organisms.
question 5. what group of organic compounds has a hydroxyl group -o-h attached to a carbon atom?
a) alcohols
b) amines
c) ethers
d) ketones

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl +4h2o enter the elemental symbol. view available hint(s) is reduced

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons