What type of macromolecule carries out catalysis in biological systems?

A) proteins called enzymes

B) carbohydrates called starches

C) lipids called steroids

D) nucleic acids called DNA

E) carbohydrates called sugars

A device that generates an electrical current by taking advantage of a difference in the spontaneous tendency of substances to lose and gain electrons is called an A) electrochemical cell. B) electrolysis cell. C) electroplating cell.

Nitromethane (CH3NO2) burns in air to produce significant amounts of heat via the following reaction: 2CH3NO2 (l) + 32O2 (g) →2CO2 (g) + 3H2O (l) + N2 (g) ΔH∘rxn=-1418kJ How much heat is produced by the complete reaction of 3.78 kg of nitromethane?

Which of the following could be the molecular formula for an alkane? A - C7H16 B - C7H14 C-C7H12 D-C7H10

If the pOH of a solution os 3.9, solve for the following: pH= H-= OH-= Is the solution an acid or base?

Q3. (a) Is Magnesium stable before bonding? (1) Explain your answer: - - (b) Is Oxygen stable before bonding? (1) Explain your answer: - --

Distinguish between acids and bases by indicating TWO general properties of acids and TWO general properties of bases. Be specific!

In the redox fueling reaction, succinate + nad ↔ fumarate + nadph, the succinate molecule is undergoing which process?

How are neutral atoms converted into cations

A chemical reaction, when more energy is released than is needed to get the reaction started, is called?

What type of rock cannot be changed into a metamorphic rock? A) sedimentary B) igneous C) metamorphic D) magma