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kolbaska11 [484]
2 years ago
14

Which of the following is a statement of Hess's law?

Chemistry
2 answers:
amid [387]2 years ago
5 0

Answer:

Letter C...........................

Explanation:

Letter C

Alenkinab [10]2 years ago
5 0

Answer:

D) The enthalpy of reaction does not depend on the steps taken in the reaction.

Explanation:

In my study guide, it says, "Hess's law states that the enthalpy of a reaction does not depend on the path."

hope this helps~

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Which one is an ionic compound?<br><br> A. CINe<br> B. NaP<br> C. Na2<br> D. NO<br> E. FeW
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Which of the following is what an elements are made of?
loris [4]

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Explanation:

6 0
2 years ago
a substance is analyzed to have a percent composition of 74.186% sodium and 25.814% fluorine. calculate the empirical formula
Novosadov [1.4K]

Answer:

Na₂₆F₁₁

Explanation:

We find the moles of the substance assuming 100 g of the substance is present. Why do we take 100 g? Because then the percent of sodium/fluorine, would be the g of sodium/fluorine respectively:

74.186 g Sodium | 1 mol Sodium/23 g              =>       3.2255 mol Na    

25.814 g Fluorine | 1 mol Fluorine/19 g             =>       1.3586 mol F

Divide each by smallest number of moles:

3.2255/1.3586 = 2.37

1.3586/1.3586 = 1

Multiply by common number to get a smallest whole number:

2.37*11 = 26,

1*11 = 11

The empirical formula is Na₂₆F₁₁

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(HELP FAST)Which of the following always changes when a substance undergoes a<br> chemical change?
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Read 2 more answers
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