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mestny [16]
3 years ago
11

Which of the following is the correct definition of chemical energy?

Chemistry
2 answers:
den301095 [7]3 years ago
6 0
Chemical energy, Energy stored in the chemical bonds of molecules
iris [78.8K]3 years ago
4 0
Hello! The answer to "Which of the following is the correct definition of chemical energy" is 
A : energy stored in chemical bonds of molecules.
why? because chemical energy needs to store its molecules in things to keep it going!
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An electron in a hydrogen atom moves from level 1 to level 4. The electron then drops from level 4 to level 2. Which statement d
butalik [34]

Answer:

B. The energy absorbed in the first move is greater than the energy released in the second move.

Explanation:

It takes large amounts of energy for a electron to jump energy levels and the further it moves, the more it takes.

6 0
3 years ago
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MgSO4 x 7H2O:
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Answer:In regards to writing the formula, we know that magnesium has a charge of 1+ and sulfate, SO4, has a charge of 1-. Sulfate is a polyatomic ion so the charge of the whole thing is (SO4)1-. When you combine them you end up with MgSO4 and the "heptahydrate" is seven water molecules.

Explanation:

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A 3.06 gram sample of an unknown hydrocarbon with empirical formula CH2O was found to contain 0.0170 moles of the substance. Wha
Yanka [14]

Answer:

180 amu

C₆H₁₂O₆

Explanation:

Step 1: Determine the molecular mass of the compound

The sample has a mass (m) of 3.06 g and it contains (n) 0.0170 moles. The molar mass M is:

M = m/n = 3.06/0.0170 mol = 180 g/mol

Then, the molecular mass is 180 amu.

Step 2: Determine the molar mass of the empirical formula.

M(CH₂O) = 1 × M(C) + 2 × M(H) + 1 × M(O)

M(CH₂O) = 1 × 12 g/mol + 2 × 1 g/mol + 1 × 16 g/mol = 30 g/mol

Step 3: Determine the molecular formula

First, we will determine "n" according to the following expression.

n = molar mass molecular formula / molar mass empirical formula

n = 180 g/mol / 30 g/mol = 6

The molecular formula is:

n × CH₂O = 6 × CH₂O = C₆H₁₂O₆

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2 years ago
What is the interval used on the y-axis of this graph?
bezimeni [28]

Answer:

5

Explanation:

the numbers go up by 5

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