StoichiometryAvogadro Constant and Molar Mass246Choose the best answerOne Avogadro number, NA, of helium atoms has a mass of approximately:A1 gB4 gC8 gD16 g Like 0 Discuss 0Share
StoichiometryMass of an Element in a Compound247Choose the best answerHow much sulfur is present in 0.1 mol SO₂?A32 gB3.2 gC0.32 gD0.032 g Like 0 Discuss 0Share
Stoichiometry 11#Physical and Chemical Changes248Choose the best answerWhich option represents a chemical change?ATwinkling of starsBCooking of vegetablesCCutting of fruitsDBoiling of water Like 0 Discuss 0Share
StoichiometryMolar Volume and Number of Molecules249Choose the best answer6.022 × 10²² molecules of N₂ occupy what volume at STP (273 K and 1 atm)?A22.4 LB2.24 LC6.02 LD6.02 mL Like 0 Discuss 0Share
Stoichiometry#Atomic Mass Unit250Choose the best answer1/N_A gram is numerically equal to:AOne mole of an atomBOne atomic mass unit (1 u)CThe mass of one carbon-12 atomDAvogadro's number Like 0 Discuss 0Share