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Stella [2.4K]
3 years ago
5

A chemist weighed out 19.9 g of aluminum. Calculate the number of moles of aluminum she weighed out.

Chemistry
1 answer:
vodomira [7]3 years ago
3 0
Aluminum is 26.982 grams per mole, so 26.982/19.9 will give you the moles 1.3558794
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An independent variable is....
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Answer:

B - What we change

Explanation:

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Conclusion - what we conclude

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5 0
3 years ago
A 10-gram aluminum cube absorbs 677 joules when its temperature is increased from 50°C to 125°C. What is the specific heat of al
ra1l [238]
<h3>Answer:</h3>

0.90J/g°C

<h3>Explanation:</h3>

We are given:

Mass of Aluminium = 10 g

Quantity of heat = 677 Joules

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We are required to calculate the specific heat capacity of Aluminium

But, Quantity of heat = Mass × specific heat × Change in temperature

Q = mcΔt

Rearranging the formula;

c = Q ÷ mΔt

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  = 677 J ÷ 750g°C

  = 0.903 J/g°C

  = 0.90J/g°C

Thus, the specific heat capacity of Aluminium is 0.90J/g°C

8 0
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Murljashka [212]

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