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Crazy boy [7]
3 years ago
11

A sample of 250 g of water are heated from 40°C to 121°C, calculate the amount of heat energy absorbed.

Chemistry
1 answer:
Marysya12 [62]3 years ago
7 0

Answer:

the anwser isn't in the choices

Explanation:

H=MC(change of temp.)

M=mass of water=250g

C=specific heat of water = 4.186 j/g

change in temperature is 121-40= 81

H= 250x4.186x81=84766.5J

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alexandr402 [8]

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Explanation:

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6 0
1 year ago
I really need help with this I would really appreciate it​
gulaghasi [49]
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4 years ago
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4 0
3 years ago
The atmospheric pressure on the surface of Venus is 6.84X10^4. Calculate the atmospheric pressure in atm and torr. Round each of
quester [9]

Answer:

0.675 atm

513 Torr

Explanation:

Given is that, the atmospheric pressure on the surface of Venus is

6.84 X 10⁴ Pa.

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Pressure in atm = \frac{6.84 \times 10^{4} }{101325}

= 0.675055 atm

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Now,  one Torr is 133.322 Pa. For conversion, divide the pressure value by 133.322.

Pressure in Torr = \frac{6.84 \times 10^{4} }{133.322}

=513.04219 Torr

Rounding it off to 3 significant digits: 513 Torr

5 0
3 years ago
When did oxygen first appear in earth's atmosphere??
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