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svp [43]
3 years ago
9

For a certain chemical reaction, the bond energy of the reactants is 72 kJ, and

Chemistry
2 answers:
allochka39001 [22]3 years ago
6 0

Answer:

C. 33 kJ

Explanation:

:p

dalvyx [7]3 years ago
3 0
I think its A sorry if im wrong
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What happens if the metal you throw in is MORE REACTIVE than the<br> metal ion in solution?
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A displacement reaction Would occur in this situation
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3 years ago
You have 1.0 mole of each compound below. which has the greatest mass?
kramer
(a) Iron (iii) sulphate:
From the periodic table:
mass of iron = 55.845 grams
mass of sulphur = 32.065 grams
mass of oxygen = 16 grams
Iron (iii) sulphate has the formula: Fe2(SO4)3
molar mass = 2(55.845) + 3(32.065) + 3(4)(16) = 399.885 grams

(b) Sodium hydroxide:
From the periodic table:
mass of sodium = 22.989 grams
mass of oxygen = 16 grams
mass of hydrogen = 1 gram
Sodium hydroxide has the formula: NaOH
molar mass = 22.989 + 16 + 1 = 39.989 grams

(c) Barium carbonate
From the periodic table:
mass of barium = 137.327 grams
mass of carbon = 12 grams
mass of oxygen = 16 grams
Barium carbonate has the formula: BaCO3
molar mass = 137.327 + 12 + 3(16) = 197.327 grams

(d) ammonium nitrate:
From the periodic table:
mass of nitrogen = 14 grams
mass of hydrogen = 1 gram
mass of oxygen = 16 grams
Ammonium nitrate has the formula: NH4NO3
molar mass = 14 + 4(1) + 14 + 3(16) = 80 grams

(e) Lead (iv) oxide
From the periodic table:
mass of lead = 207.2 grams
mass of oxygen = 16 grams
Lead (iv) oxide has the formula: PbO2
molar mass = 207.2 + 2(16) = 239.2 grams

From the above calculations, we can see that:
Iron (iii) sulphate has the greatest mass.
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3 years ago
Which of the following is the best thermal conductor?<br><br> metal<br> wood<br> paper<br> air
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Answer:

metal

Explanation:

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False.

Its newtons <u>law</u> of gravity. We already know that it works and has been proven.

A <u>theory</u> is an idea, or something that someone believes to be true, but might not be

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Number 2 I don't get what the question is asking
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Can you post the question, on here? I cant open the document. 
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3 years ago
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