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Serhud [2]
3 years ago
12

A sample of an unknown metal has a mass of 120.4 g. As the sample cools from 90.5°C to 25.7°C, it releases 7020 J of energy. Usi

nf the chart below, what is the identity of the metal in the sample? Hint Calculate specific heat first Substance Specific Heat Water (liquid) 4.184 J/g °C 0.899 J/g °C 0.803 J/g °C 0.449 J/g °C a) Aluminum ) b) Granite Oc) Water d) Iron​
Chemistry
1 answer:
Dafna1 [17]3 years ago
6 0

Answer:

Explanation:

sheesh i wouldn’t know

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Decomposition is the reverse of combination. therefore decomposition reaction is a type of reaction where one reactants produces two or more reactants.
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4 years ago
aluminum bronze contains 92.0% of copper and 8.0% aluminum. what maximum mass of aluminum bronze can be prepared from 73.5g of c
slega [8]
The answer is 79.9 g.

Copper takes 92.0% of aluminum bronze and it is a limiting factor. We have aluminum in excess, so we need to make a proportion.
If 73.5 g of copper are 92.0%, how many g of aluminum bronze will be 100%:
73.5 g : 92.0% = x : 100%.
x = 73.5 g : 100% * 92.0%
x = 79.9 g

Therefore, from 73.5 g of copper and 6.4 g of aluminum (since 79.9 g - 73.5 g = 6.4 g), maximum 79.9 g of aluminum bronze can be prepared.
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3 years ago
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Dmitriy789 [7]
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7 0
3 years ago
What is the Molar mass of Na3P
Sedaia [141]

Answer:

99.943071 g/mol

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6 0
3 years ago
Draw a line-bond structure for CBrN. Explicitly draw all H atoms. You do not have to include lone pairs in your answer. In cases
DochEvi [55]

Answer:

Br - C ≡ N

Explanation:

To draw the Lewis line-bond structure we need to bear in mind the octet rule, which states that in order to gain stability each <em>atom tends to share electrons until it has 8 electrons in its valence shell</em>.

  • C has 4 e⁻ in its valence shell so it will form 4 covalent bonds.
  • Br has 7 e⁻ in its valence shell so it will form 1 covalent bond.
  • N has 5 e⁻ in its valence shell so it will form 3 covalent bonds.

The most stable structure that respects these premises is:

Br - C ≡ N

It does not have any H atom.

8 0
3 years ago
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