Question

Name MULTIPLE CHOICE. Choose the one als HOICL Choose the one alternative that best completes the statement or answer the questio 1) A reaction in which a substance reacts with oxygen, emitting heat and forming oxygen-containing compounds is an example of an): A) combustion reaction B) gas evolution reaction C) precipitation reaction. D) acid-base reaction E) none of the above 2) What are the coefficients for the following reaction when it is properly balanced? _HCl+_Mg _MgCl2+_H2 A) 1.2.1/21 B) 2,1,2,2 C) 1.1.1.2 D) 2,1,1,1 E) none of the above 3) Before a chemical equation can be written, one must know A) the symbols and formulas of all reactants and products. B) the molar mass of all the compounds. C) the atomic mass of all the elements involved. D) the number of moles of all reactants and products, E) none of the above. 4) What are the coefficients for the following reaction when it is properly balanced? potassium iodide +_ lead (II) acetate _ lead (II) iodide_potassium acetate A) 2,1,1,1 B) 3, 2.2.1 C) 1,1,2,2 D) 2.1, 1.2 E) none of the above 5) 5) Sodium metal reacts with water to form aqueous sodium hydroxide and hydrogen gas. Which equation below best describes the balanced equation for this reaction? A) S.H20-SOH(aq) +H (g) B) Na+H20 NaOH(aq).H(g) C) 2Na+2H20 -- 2NaOH(aq) + H2 (8) D) 2Na+H20 - Na2OH(aq) +H (6) E) Na+H20 --NaOH(aq) + H2(g)

Answer 1

0 Answer = © Combustion reaction 2HCl + ma mqCl2 + H2 Answer = ophion ☺ | Answes = 2KI + Pb (Cuzcoo)2 -> PbI2 + 2 k (CH3Coo)a Potassium head (11) head (1) Polassieme Todide acetaten acetate iodide (Anshor = option Anawen = Ophion © 2Na + 2420 ] > 2N2O4 + 42 5 2 Na + 2H2O - > 2NaOH 12 mkuu Scanned with CamScanner i