Chemistry & Stoichiometry Basics

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Fundamentals & stoichiometry quiz

AINA MARDZIAH AHMAD RIFA’I

Malaysia

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Chemistry & Stoichiometry Basics


Froggy Jumps Chemistry & Stoichiometry BasicsVersion en ligne Fundamentals & stoichiometry quiz par AINA MARDZIAH AHMAD RIFA’I 1 What is the standard unit for the amount of substance? a Molecule b Gram c Mole 2 Avogadro's number is approximately: a 3.14 × 10^23 b 6.022 × 10^23 c 6.022 × 10^20 3 Matter is neither created nor destroyed in a chemical reaction. a Ideal Gas Law b Law of Definite Proportions c Law of Conservation of Mass 4 Stoichiometry describes the proportions of reactants and products in a balanced equation. a Only for gases b false c true 5 Which equation is balanced: 2H2 + O2 -> 2H2O a H2O -> H2 + O2 b 2H2 + O2 -> 2H2O c H2 + O2 -> H2O 6 Molar mass is the mass of exactly one mole of a substance. a True b False c Only for elements 7 The limiting reactant is the reactant that determines the amount of product formed. a True b Always the excess reactant c False 8 Percent yield compares actual product to theoretical product. a Only for gases b True c False 9 Empirical formula represents the simplest whole-number ratio of atoms in a compound. a True b It is the same as the molecular formula always c False 10 Standard Temperature and Pressure (STP) is 1 atm and 0°C. a True b 1 atm and 25°C c False