TS EAPCET (Engineering) Stoichiometry — practice questions
58 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice TS EAPCET (Engineering) Stoichiometry in the app →Which chemist is credited with the law of conservation of mass?Which law fixes the mass ratio of elements in a compound?Water has 16 g oxygen per 2 g hydrogen; hydrogen peroxide has 32 g. What is the oxygen mass ratio?In which year did Gay Lussac announce his law of combining gas volumes?At the same temperature and pressure, 200 mL of H2 reacts fully with O2 to form steam. How much O2 is needed?According to Avogadro's law, equal volumes of gases at the same T and P contain equal numbers of what?Which year saw Avogadro propose that equal gas volumes hold equal numbers of molecules?Carbon forms CO and CO2. For 12 g of carbon, the oxygen masses are 16 g and 32 g. Which law does this show?Which symbol has replaced 'amu' as the unit for atomic mass?What is 1 amu in grams?The average atomic mass of naturally occurring carbon is about what?The molecular mass of methane, CH4, is approximately what?Why is formula mass, not molecular mass, used for sodium chloride?In solid sodium chloride, how many Cl- ions surround each Na+ ion?The SI mole contains exactly how many elementary entities?What is the molar mass of sodium chloride, NaCl, in g per mol?The molar mass in grams is numerically equal to the mass in which unit?How many molecules are in 1 mol of water?How many hydrogen atoms are in 0.5 mol of hydrogen atoms?How many moles are present in 36 g of water (molar mass 18 g per mol)?What is the mass of 0.25 mol of CO2 (molar mass 44 g per mol)?How many CO2 molecules are present in 22 g of carbon dioxide?What is the mass percent of oxygen in water, to two decimals?Ethanol C2H5OH has a molar mass of 46.068 g. What is its carbon mass percent?How is the mass percent of an element in a compound calculated?What does an empirical formula show?How is the molecular formula obtained from the empirical formula?A compound has 4.07% H, 24.27% C and 71.65% Cl, with molar mass 98.96 g. What is its molecular formula?A compound is 40% C, 6.7% H and 53.3% O by mass. What is its empirical formula?The empirical formula is CH2O and the molar mass is 180 g per mol. What is the molecular formula?What is the empirical formula of benzene, C6H6?Which two Greek words give rise to the word stoichiometry?Who first used the term stoichiometry, in 1792?Stoichiometry mainly deals with what in a chemical reaction?How many moles of CH4 are needed to make 22 g of CO2 on burning?50.0 kg N2 and 10.0 kg H2 react to form NH3. Which is the limiting reagent?What mass of NH3 forms from 50.0 kg N2 and 10.0 kg H2?Numbers before formulas in a balanced equation are called what?In CH4 + 2O2 -> CO2 + 2H2O, what is the IUPAC stoichiometric number of O2?What is the limiting reagent in a reaction?What is an excess reactant?What is meant by a stoichiometric amount of a reagent?How does a catalytic reactant differ from a stoichiometric reactant?In 2H2 + O2 -> 2H2O, what mass of O2 reacts completely with 4 g of H2?What mass of CO2 forms when 12 g of carbon burns completely in air?Which law is used in gas stoichiometry when the gases are assumed ideal?How much 1 M NaOH is diluted to 1 L to make a 0.2 M solution?A 250 mL solution holds 0.5 mol of solute. What is its molarity?2 g of a solute is added to 18 g of water. What is its mass percent?The mole fraction of a component is its moles divided by what?How many moles are in 49 g of H2SO4 (98 g per mol)?What mass of O2 is 3.011 x 10^23 molecules (O2 = 32 g per mol)?In balanced C3H8 + x O2 -> 3CO2 + 4H2O, what is x?What mass of NH3 forms from 28 g N2 with excess H2 in N2 + 3H2 -> 2NH3?2 mol H2 and 2 mol O2 react as 2H2 + O2 -> 2H2O. How much water forms?What mass of CaO forms by heating 100 g of CaCO3 (CaCO3 -> CaO + CO2)?Why is 17.031 g of ammonia not exactly 14 g N plus 3 g H?By definition, the atomic mass of carbon-12 is exactly how many daltons?