4.Please give handwritten answer (a) A compound MX2 is formed from the M²+ and X ions. The compound contains 86.8% of X bymass. In a reaction, a 0.96 g M²+ ion reacts completely with 0.079 mol X¯ ion. Determine theidentity of M²+ and X.(b) In a reaction, the mixture of 13.4 g of calcium fluoride (CaF₂) and 11.1 g of sulfuric acid(H₂SO4) was heated to give off gaseous hydrogen fluoride (HF). The reaction is as shown:CaF2 (s) + H₂SO4 (1) → 2HF (g) + CaSO4 (s)Determine the maximum amount (grams) of hydrogen fluoride that can be obtained.(c) A compound containing barium (Ba) and oxygen, weighed 2.018 g, was dissolved to producebarium ions in solution. The barium ions are then separated from the solution by precipitatingmethod. The precipitate formed was 3.018 g of BaCrO4. Determine the chemical formula ofthe compound.(d) For the following reaction, determine the mass of sulfur would be needed to obtain 80.0 g ofCS₂. The percent yield of the reaction is consistently 92%.CH4 (g) + 4S (g) → CS2 (g) + 2H₂S (g)

Answered: Image /qna-images/answer/1312766d-4acb-408e-a5f0-314e839f0f0f.jpg

(a) A compound MX2 is formed from the M²+ and X¯ ions. The compound contains 86.8% of X by mass. In a reaction, a 0.96 g M²+ ion reacts completely with 0.079 mol X ion. Determine the identity of M²+ and X“.

(a) A compound MX2 is formed from the M²+ and X¯ ions. The compound contains 86.8% of X by mass. In a reaction, a 0.96 g M²+ ion reacts completely with 0.079 mol X ion. Determine the identity of M²+ and X“.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter3: Chemical Reactions

Section: Chapter Questions

Problem 65QRT

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Concept explainers

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

Question

4.Please give handwritten answer

(a) A compound MX2 is formed from the M²+ and X ions. The compound contains 86.8% of X by
mass. In a reaction, a 0.96 g M²+ ion reacts completely with 0.079 mol X¯ ion. Determine the
identity of M²+ and X.
(b) In a reaction, the mixture of 13.4 g of calcium fluoride (CaF₂) and 11.1 g of sulfuric acid
(H₂SO4) was heated to give off gaseous hydrogen fluoride (HF). The reaction is as shown:
CaF2 (s) + H₂SO4 (1) → 2HF (g) + CaSO4 (s)
Determine the maximum amount (grams) of hydrogen fluoride that can be obtained.
(c) A compound containing barium (Ba) and oxygen, weighed 2.018 g, was dissolved to produce
barium ions in solution. The barium ions are then separated from the solution by precipitating
method. The precipitate formed was 3.018 g of BaCrO4. Determine the chemical formula of
the compound.
(d) For the following reaction, determine the mass of sulfur would be needed to obtain 80.0 g of
CS₂. The percent yield of the reaction is consistently 92%.
CH4 (g) + 4S (g) → CS2 (g) + 2H₂S (g)

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