3 years ago

Significant figures

Chemistry

1 answer:

Gnom [1K]3 years ago

5 0

Answers:

A) 3 B) 1 C) 3
D) 2 F) 2 G) 3
H) 3 I) 3

Hope this helps!

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Identify the element using the Bohr model below.

Maurinko [17]

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2 years ago

3. A 31.2-g piece of silver (s = 0.237 J/(g · °C)), initially at 277.2°C, is added to 185.8 g of a liquid, initially at 24.4°C,

VARVARA [1.3K]

Answer:

$Cp_{liquid}=2.54\frac{J}{g\°C}$

Explanation:

Hello,

In this case, since silver is initially hot as it cools down, the heat it loses is gained by the liquid, which can be thermodynamically represented by:

$Q_{Ag}=-Q_{liquid}$

That in terms of the heat capacities, masses and temperature changes turns out:

$m_{Ag}Cp_{Ag}(T_2-T_{Ag})=-m_{liquid}Cp_{liquid}(T_2-T_{liquid})$

Since no phase change is happening. Thus, solving for the heat capacity of the liquid we obtain:

$Cp_{liquid}=\frac{m_{Ag}Cp_{Ag}(T_2-T_{Ag})}{-m_{liquid}(T_2-T_{liquid})} \\\\Cp_{liquid}=\frac{31.2g*0.237\frac{J}{g\°C}*(28.3-227.2)\°C}{185.8g*(28.3-24.4)\°C}\\ \\Cp_{liquid}=2.54\frac{J}{g\°C}$

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3 years ago

Which of the following should

Sergeu [11.5K]

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Heat energy is transferred on Earth by the processes of convection, conduction, and radiation. How does heat energy cause materi

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3 years ago

I’m taking a test!! Please help!!

777dan777 [17]

Answer:

I am not really sure, but I think Fr.

Explanation:

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2 years ago

Read 2 more answers

Significant figures ​

Significant figures