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3 years ago

Helpmeh on this question

Chemistry

2 answers:

zepelin [54]3 years ago

8 0

Answer:

E. Metallic bonds form because electrons can move freely among the metal atoms.

Explanation:

Your fourth image states that the valence electrons of a metal move freely among the neighbouring metal atoms.

A. is wrong because both your second and fourth images tell you that when atoms form metallic bonds they neither gain nor lose electrons.

B. is wrong because a metal does not contain anions.

C. is wrong because only metals form metallic bonds. A metal reacts with a nonmetal to form an ionic bond.

D. is wrong because an alloy of two different metals can form metallic bonds. For example, brass is an alloy of Cu and Zn. Its atoms form metallic bonds.

jolli1 [7]3 years ago

6 0

The answer would be B imo

C and E are wrong right off the bat.

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Answer:

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b) 14.78 grams ammonia is incorporated into 100. g of compound.

Explanation:

a) Ammonium dihydrogen phosphate that is $NH_6PO_4$ .

Molecular mass of ammonium dihydrogen phosphate = M

M = 115 g/mol

Percentage of an element in a compound:

$\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{molecular mass of element}}\times 100$

Percentage of nitrogen:

$\frac{1\times 28 g/mol}{115 g/mol}\times 100=24.34\%$

Percentage of phosphorus:

$\frac{1\times 31g/mol}{115 g/mol}\times 100=26.95\%$

b) Percentage of ammonia in 1 molecule of ammonium dihydrogen phosphate.

Molar mass of ammonia = 17 g/mol

$\%=\frac{17 g/mol}{115 g/mol}\times 100=14.78\%$

Amount of ammonia in 100 grams of compound:

14.78% of 100 g of ammonium dihydrogen phosphate:

$\frac{14.78}{100}\times 100 g=14.78 g$

14.78 grams ammonia is incorporated into 100. g of compound.

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3 years ago

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Helga [31]

Answer: 2

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2 years ago

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