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ad-work [718]
3 years ago
7

How much heat is absorbed when 70 grams of

Chemistry
1 answer:
mart [117]3 years ago
8 0

Answer:

Thus, the joules of heat absorbed when 70.0 grams of water is completely vaporised at its boiling point are 158,200.

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Answer:

The force would decrease

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If there is a third-quarter moon on July 2, what is the approximate date of the next full moon?
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I think the next full moon July 12th I think.. I'm pretty sure.
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3 years ago
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37.2 liters of a gas has a pressure of 362.43 kPa at 46.5 °C. If the pressure increases to
Nataliya [291]

Answer:

Option A. 25.7 L.

Explanation:

Step 1:

Data obtained from the question. This include the following:

Initial volume (V1) = 37.2 L

Initial pressure (P1) = 362.43 kPa

Initial temperature (T1) = 46.5 °C

Final pressure (P2) = 693.9 kPa

Final temperature (T2) = 149.2 °C

Final volume (V2) =.?

Step 2:

Conversion of celsius temperature to Kelvin temperature.

This can be achieved as shown below:

Temperature (K) = Temperature (°C) + 273

T (K) = T (°C) + 273

Initial temperature (T1) = 46.5 °C

Initial temperature (T1) = 46.5 °C + 273 = 319.5 K.

Final temperature (T2) = 149.2 °C

Final temperature (T2) = 149.2 °C + 273 = 422.2 K.

Step 3:

Determination of the new volume.

This can be obtained by using the general gas equation as shown below:

Initial volume (V1) = 37.2 L

Initial pressure (P1) = 362.43 kPa

Initial temperature (T1) = 319.5 K

Final pressure (P2) = 693.9 kPa

Final temperature (T2) = 422.2 K

Final volume (V2) =.?

P1V1/T1 = P2V2/T2

362.43×37.2/319.5 = 693.9 × V2/422.2

Cross multiply

319.5×693.9×V2 = 362.43×37.2×422.2

Divide both side by 319.5 × 693.9

V2 = (362.43×37.2×422.2)/(319.5×693.9)

V2 = 25.7 L

Therefore, the new volume is 25.7 L.

8 0
4 years ago
Which is the correct way to write 602,200,000,000 ,000,000,000,000 in scientific notation
salantis [7]

Answer:

6.022 × 10^23

hope this helps :)

8 0
3 years ago
How many atoms are there in 8.97 grams of lead (Pb)
Sophie [7]

Answer:D. 2.61 x 10^22

Explanation:

Given that mass of Lead(Pb) = 8.97g

Molar mass of lead =207.2g/mol

No of moles = Mass / molar mass

=8.97g/207.2g/mol

= 0.04329moles

Converting to atoms using Avogadro's number

we know that

1 mole = 6.022 x 1023 atom

Therefore 0.04329 moles of Pb = 0.04329moles x  6.022 x 10^23 atoms

=2.6069 x 10^22

=2.61 x10^22atoms

8 0
3 years ago
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