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enot [183]
3 years ago
9

How many moles is 1.81 x 10^24 atoms of carbon?

Chemistry
1 answer:
Volgvan3 years ago
4 0
Well a number you have to know is 6.02 x 10^23. That is how many atoms there are in a mole.

So if you have 1.81 x 10^24 atoms,
you divide that by 6.02 x 10^24 moles to get 3 moles

Using factor/label method:
1.81 x 10^24 atoms * 1 mol
                                   ------------------------   = 3 moles
                                   6.23 x 10^23 atoms
(As you can see, the unit "atoms" cancels out from the top and bottom.)

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Answer:

the raising atomic number

Explanation:

Elements are listed on the periodic table according to their atomic number.

6 0
3 years ago
Calculate the ΔHrxn for the following
Vesnalui [34]

Answer:

2 NO (g) → N2 (g) + O2 (g)

2 NOCl (g) → 2 NO (g) + Cl2 (g)

____________________________

2NOCl (g) ⟶ N2 (g) + O2 (g) + Cl2 (g)

ΔH = [90.3 kJ x 2 x -1] +  [-38.6 kJ x -1 x 2] = -103.4 kJ

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3 years ago
According to Newton’s second law of motion, when an object is acted on by an unbalanced force, how will that object respond? It
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Answer:

C) It will accelerate.  

Explanation:

According to Newton’s second law of motion, when an object is acted on by an unbalanced force, it will accelerate.

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A) is wrong. The object will stop moving only if there is a balanced force in the opposite direction.

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What is the value of delta Hrxn for this equation:
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The ΔHrxn for the above equation = 179 kJ/mol

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ΔHrxn = 1,170 + 1,004 - (603 + 1,392) = 179 kJ/mol

6 0
3 years ago
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