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Alinara [238K]
3 years ago
5

Examine the reaction equation. Mg(OH)2(s) + HCl(aq) →H2O(l) + MgCl2(aq) What coefficients will balance the equation? A) 2, 4, 2,

2 B) 1, 2, 3, 1 C) 1, 1, 1, 1 D) 1, 2, 2, 1
Chemistry
2 answers:
r-ruslan [8.4K]3 years ago
6 0

Answer:

D

Explanation:

1, 2, 2, 1

mihalych1998 [28]3 years ago
5 0

Answer:

D

Explanation:

Mg(OH)2(s) + HCl(aq) →H2O(l) + MgCl2(aq)

Left Side

Mg = 1

O = 2

H = 3

Cl = 1

Right Side

Mg = 1

O = 1

H = 2

Cl = 2

Mg(OH)2(s) + 2HCl(aq) →2H2O(l) + MgCl2(aq)

Left Side

Mg = 1

O = 2

H = 4

Cl = 2

Right Side

Mg = 1

O = 2

H = 4

Cl = 2

D) 1, 2, 2, 1

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Answer:

108.9g of Silver can be produced from 125g of Ag2S

Explanation:

The compound Ag2S shows that two atoms of Silver Ag, combined with an atom of Sulphur S to form Ag2S. We can as well say the combination ration of Silver to Sulphur is 2:1

•Now we need to calculate the molecular weight of this compound by summing up the molar masses of each element in the compound.

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•Molecular weight of Ag2S= 215.8g/mol + 32g/mol= 247.8g/mol

•From our calculations, we know that 215.8g/mol of Ag is present in 247.8g/mol of Ag2S

If 247.8g Ag2S produced 215.8g Ag

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cross multiplying we have

xg= 215.8g × 125g / 247.8g

xg= 26975g/247.8

xg= 108.85g

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