12. Consider the following reaction! Which of the following statements istrue re

Question

12. Consider the following reaction! Which of the following statements istrue regarding this meacson? as Hir is the osidizing agent. b Magnesium is osidiaed in this reaction. This is not an oNidation reduction reaction. d None of the above, 13 which of the fouowing is not a product of the reaction hydrochloric acid with sodium hydrogen carbonate? Nacho4(aq) c NaCl(aq d. CO2 (g 14, What is the coefficient for Na when the following reaction isbalanced with smallest whole number coefficients? a, 1 b 2 15. An ideal gas has a volume of 40Lat a pressure of 3.0 atm. The volume of the gas is then increased by2OL What is the new pressure of the gas You can assumethat the temperature and number of molecules were kept constant, a, 4.5 atm b, 2.0 atm c, 1.5 atm d, 6.0 atm

Explanation / Answer

(1)

Given that,

Intial volume, V1 = 45 mL = 0.045 L

Initial molarity, M1 = 12 M

Final volume, V2 = 2.0 L

Final molarity, M2 = ?

Dilution formula,

M1 V1 = M2 V2

M2 = M1 V1 / V2

M2 = 12 * 0.045 / 2.0

M2 = 0.27 M

So, tha answer is (c)

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