Which subatomic particles are located in the nucleus of an He-4 atom?

(1) electrons and neutrons

(2) electrons and protons

(3) neutrons and protons

(4) neutrons, protons, and electrons

How many moles of HCl are required to neutralize all 0.050 mol of Ca (OH) 2

Is frying an egg a physical or chemical change

Solve for x in the following expression: 3 / x = 7 A) 2.33 B) 21 C) 4 D) 0.4285

Which atom in the ground state has the same electron configuration as a calcium ion, Ca2+, in the ground state? (1) Ar (2) K (3) Mg (4) Ne

Which is not part of the first law of thermodynamics? A. Energy cannot be created or destroyed. B. The total amount of energy in the universe is constant. C. Energy can change forms. D. The universe is always slowly gaining energy

What two chemical mechanisms change pyruvate to acetyl-CoA in the pyruvate dehydrogenase complex? Group of answer choices a) Decarboxylation and condensation. b) Oxidation and decarboxylation. c) Condensation and dehydrogenation.

Which earth cycle does the suns energy drive

How many moles are in 10 grams of CaCl2?

Which is the correct formula for phosphorus pentachloride? PCl4 because a subscript of 4 indicates four Cl atoms PCl5 because a subscript of 5 indicates five Cl atoms P5Cl because a subscript of 5 indicates five P atoms P5Cl3 because a subscript of

Why are the elements in groups 3 to 12 often used to make dyes?