The process of using a balanced chemical equation to calculate quantities of the
ID: 526213 • Letter: T
Question
The process of using a balanced chemical equation to calculate quantities of the reactants and products is called: a.) percentage yield calculation b.) limiting reagent determination c.) theoretical yield d.) stoichiometry e.) percentage H_2O calculations. Which of the following is not a molecule? A.) GaL_3 b.)IBr_2 c.) SiO_2: d.)H_2O e.) CS_2 f.) NF_3. The type of attractive force present in BrF is: a.) London forces b.) hydrogen bonding c.) dispersion forces d.) dipole-dipole forces e.) ionic forces. Which of the following gases will give a sharp chocking odor? A.) O_2 b.) H_2 c.) CO_2 d.) SO_2 e.) NO_2 f.) H_2S. Which of the following is not a formula unit? A.) CaCl_2 b.) NH_4Cl c.) Na_3PO_4 d.) SeBr_2 e.)GaCl_3. The number of moles in 392 grams of sulfuric acid is approximately: a.) 98 b.) 4.00 c.) 5.00 d.) 0.0500 e.) 0.250 If you have 4.9 grams of H_3PO_4 and the molar mass of H_3PO_4 is 98 grams, then you have: a.) 20 b.) 1.0 c.) 0.50 d.) 0.050 e.) 5.0 moles of H_3PO_4. You can also say you have: a.) Avogadro's # b.) 98 c.) 3.011 times 10^22 d.) 6.022 times 10^23 e.) 4.82 times 10^23 formula units of H_3PO_4. Which has the most number of atoms? A.) 1 mole of SO_3i b.) 1 mole of P_4O_10 c.) 1 mole of C_3H_3O d.) 1 mole of Hg(C_2O_4)2 Which substance has the biggest molar mass? A.) H_3PO_4 b.NaClO) c.) H_2SO_3 d.) S_2O_3 e.) Na3PO_3 pound) HClO_4. The percent by mass of each element in a compound is called: a.) percent composition b.) percent formula mass c.) percent decomposition d.) empirical formula e.) molecular formula A.) gram formula mass b.) empirical formula c.) molecular formula d.) percent composition e.) coefficients gives the lowest whole number ratio of the elements in a compound. It speeds up a chemical reaction (but itself is not consumed in the reaction). This is called is called a(n): a.) reactant b.) catalyst c.) by-product d.) precipitate. The starting material in a chemical reaction is called a: a.) reactant b.) catalyst c.) product d.) mole e.) precipitate. The numbers in front of chemical formulas in a chemical equations are called: a.) coefficients b.) factors c.) balancing numbers d.) fronting numbers.Explanation / Answer
1. option d:
The process of using a balanced chemical equation to calculate quantities of reactants and products is called stoichiometry.
2. option c:
SiO2 exists as a network, not as a molecule. Each Si atom is surrounded by four oxygen atoms i.e, SiO2 exists in tetrahedral units.
3. option d:
Dipole - Dipole interactions take place between two atoms having high electronegativities. The atoms share the electrons unequally because the more electronegative atom pulls the shared electrons toward itself.
4. option d:
Sulfur dioxide is a colorless gas with sharp, choking odour, it is formed by combustion of coal or oil that contains sulfur as the impurity.
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