Nuclear energy can come from

a. radioactive elements.

b. nuclear power plants.

c. certain types of rocks.

d. all of these can produce nuclear energy.

If 0.5 mole of zn is added to hydrochloric acid containing 0.6 mol of hcl, which reactant is in excess

What is the approximate area of a regular pentagon with a side lenghtt of 6 feet and a distance from the center to a vertex of 6 feet

For each of these cofactors, explain its chemical function and give an example of a particular enzyme that would use it: TPP, PLP, biotin, FAD, NADPH

What produces magnetic fields? A) a built-up electric charge B) moving electric charges C) a wire wound around a bar magnet D) two electrical insulators connected together

Is melting butter exothermic or endothermic?

How many planar and radial nodes are there in a 3p orbital?

A student makes ice cream using an old-fashioned hand-crank machine. He does 40 joules of work each time he turns the crank in a complete circle. The crank handle makes a circular path with a diameter of 0.5 meters.

Which statement is true about molecules and compounds? Question 7 options: Both are made of two or more elements. Both are made of only one element. Both are made of only one kind of atom. Both are made of two or more atoms.

Which reaction is endothermic? H2 (g) + ½ O2 (g) → H2O (g), ΔH = - 57.82 kcal ½N2 (g) + O2 (g) + 8.1 kcal → NO2 (g) ½N2 (g) + 3/2H2 (g) → NH3 (g) + 11.0 kcal C (diamond) + O2 (g) → CO2, ΔH = - 94.50 kcal

If a temperature increase from 10.0 ∘C to 21.0 ∘C doubles the rate constant for a reaction, what is the value of the activation barrier for the reaction