Question 17
Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them.

(a) Ammonia

(b) Carbon monoxide

(c) Hydrogen chloride

(d) Aluminium fluoride

(e) Magnesium sulphide

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Solution

$(a) N H_{3} (b) C O (c) H C I (d) A I F_{3} (e) M g S$

$N : H \times 3 C : O H : C I A I : F \times 3 M g : S$

$14 : 1 \times 312 : 161 : 35.5 27 : 19 \times 324 : 32$

$14 : 33 : 41 : 35.5 9 : 193 : 4$

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Question 17
Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them.

(a) Ammonia

(b) Carbon monoxide

(d) Aluminium fluoride

(e) Magnesium sulphide

Q. Give the chemical formulae for ammonia and compute the ratio by mass of the combining elements.

Q. Question 32
Which of the following are not compounds?
(a) Chlorine gas
(b) Potassium chloride
(c) Iron
(d) Iron sulphide
(e) Aluminium
(f) Iodine
(g) Carbon
(h) Carbon monoxide
(i) Sulphur powder

Q. Question 32
Which of the following are not compounds?
(a) Chlorine gas
(b) Potassium chloride
(c) Iron
(d) Iron sulphide
(e) Aluminium
(f) Iodine
(g) Carbon
(h) Carbon monoxide
(i) Sulphur powder

Write the chemical formulae of the following:

(a) Magnesium chloride

(b) Calcium oxide

(d) Aluminium chloride

(e) Calcium carbonate

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Molecular Formula

Standard IX Chemistry

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Question 17 Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (a) Ammonia (b) Carbon monoxide (c) Hydrogen chloride (d) Aluminium fluoride (e) Magnesium sulphide

(a)NH3 (b)CO (c)HCI (d)AIF3 (e)MgS N:H×3 C:O H:CI AI:F×3 Mg:S 14:1×3 12:16 1:35.5 27:19×3 24:32 14:3 3:4 1:35.5 9:19 3:4

Question 17
Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them.

(a) Ammonia

(b) Carbon monoxide

(c) Hydrogen chloride

(d) Aluminium fluoride

(e) Magnesium sulphide

$(a) N H_{3} (b) C O (c) H C I (d) A I F_{3} (e) M g S$

$N : H \times 3 C : O H : C I A I : F \times 3 M g : S$

$14 : 1 \times 312 : 161 : 35.5 27 : 19 \times 324 : 32$

$14 : 33 : 41 : 35.5 9 : 193 : 4$