12. A hydrocarbon molecule contains carbon and hydrogen atoms in equal numbers.

Question

12. A hydrocarbon molecule contains carbon and hydrogen atoms in equal numbers. Its molar mass is 130.18 g/mol. What is the molecular formula for the d, C10H a. ChH, e. CH b. C12H12 c. CisHs 13. A homogeneous mixture of two or more substances is called d. a solvent. a. a compound. a mess. b. an electrolyte. c, a solution. 14, Molarity, M, is defined as a, moles of solute dissolved in I mol of solvent, b, moles of solute dissolved in 1 kg ofsolvent. c, moles of solute dissolved in l Lofsolvent, d. moles of solute dissolved in l Lof solution. e, moles of solute dissolved in the solution. 15. How many grams of solid magnesium chloride, Mgcla, are needed to make 250 mL of 0.50 M solution? d. 125 g a. 9.5 g e, 4,8 g b. 48 g c, 12 g 16. What volume of 12 MHCI solution needs to be diluted to produce 500 ml. 3.0 M HCI solution? of

Explanation / Answer

Q12.

Hc moleucle:

MM = 130.18 g / mol

C = H

MW of C = 12

MW of H = 1

find ratio

x*12 + x*1 = 130.18

13x = 130.18

x = 10

so

C10H10

is the best answer

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