Ow do carbon-12 and carbon-13 differ?

Select all that apply.

They have different amounts of neutrons.

They have different atomic charges.

They have different mass numbers.

They have different amounts of electrons.

What is the approximate mass of a proton? (1) 1 u (2) 0.0005 u (3) 1 g (4) 0.0005 g

Which statement best describes how electrons fill orbitals in the periodic table

Calculate the theoretical atom economy for each reaction. a. 2 cuo (s) + c (s) → 2 cu (s) + co2 (g)

How is a compound different from an element?

Which are produced when HCl reacts with Ca (OH) 2?

Compared to a phosphorus atom, a P3 - ion has (1) more electrons and a larger radius (2) more electrons and a smaller radius (3) fewer electrons and a larger radius (4) fewer electrons and a smaller radius

1. Crystals of ammonium chloride, NH4Cl, seem to disappear when mixed with water. The resulting clear liquid containing ammonium chloride and water is a A) compound. B) new substance. C) homogeneous mixture. D) heterogeneous mixture. 2.

During a laboratory experiment you discover that an enzyme-catalyzed reaction has a delta G of - 20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the delta G for the new reaction

A liquid mixture in which particles can be seen and easily separated by settling or filtration is a a. solution. b. suspension. c. solvent. d. solute.

Which material best absorbs sound waves in a room? a. heavy curtains b. hardwood floors c. brick walls d. cement floors