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3 years ago

10

A substance absorbed 895 J and caused its temperature to increase by 10 ºC. If the substance has a mass of 27.9 g, what is the s

ubstance's specific heat in J/(gºC) ?
1.) 3.21

2.) 4.62

3.) 1,406.25

4.) 249,705

2 answers:

Irina18 [472]3 years ago

5 0

Answer:

i dont get the equation sorry wish i can help

vova2212 [387]3 years ago

4 0

4.62 is the correct answer

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Answer: $MgCl_2$

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74.7% Cl

First step: change % to g

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74.7g Cl

Second step: calculate g/mol of each compound. You can do this by using the atomic mass.

$25.3gMg(\frac{1mol}{24.30g})=1.04mol$

$74.7gCl(\frac{1mol}{35.45g} )=2.11mol$

Third step: determine the lowest number and divide everything by it. Of the result, extract whole number only.

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Fourth step: Write each compound with their respective number below.

This empirical formula should be: $MgCl_2$

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