Explain why a sample containing 1 mole of silver (Ag) and a sample containing 1 mole of gold (Au) have the same number of atoms but diffrent masses. 3 to 4 sentence answer Please ? :)

Which fact represents evidence for the big bang theory?

Acompound has a molecular weight of 12.124 atomic mass units and the empirical formula c3h40. what is the molecular formula of the compound?

Nitrogen dioxide decomposes according to the reaction 2 no2(g) ⇌ 2 no(g) + o2(g) where kp = 4.48 × 10−13 at a certain temperature. if 0.70 atm of no2 is added to a container and allowed to come to equilibrium, what are the equilibrium partial pressures of no(g) and o2(g)