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marshall27 [118]
2 years ago
13

If all three metals were exposed to extremely high temperatures, which would be the last to melt?

Chemistry
2 answers:
Verdich [7]2 years ago
3 0
Copper would be the last to melt because it has the highest melting point!
SVETLANKA909090 [29]2 years ago
3 0

Answer:

copper

Explanation:

because copper melts at 1,083

gold at 1 064

mercury at - 38

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After being thoroughly stirred at 10.°C, which mixture is heterogenous?(1) 25.0 g of KCl and 100. g of H2O
zheka24 [161]
The answer is (2) KNO3. This depends on the solubility of these four compounds at 10℃. For NaCl, it is 35.8 g, For NaNO3, 80.8 g. KCl, 31.2 g. KNO3, 21.9g. So only KNO3 is less than 25.0 g.
5 0
3 years ago
How many joules are needed to change the temperate of 22g of water from 18°C to 33°C?
Ira Lisetskai [31]

Answer:

Q =  1379.4 J

Explanation:

Given data:

Mass of water = 22  g

Initial temperature = 18°C

Final temperature = 33°C

Heat absorbed = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Specific heat capacity of water is 4.18 J/g. °C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 33°C - 18 °C

ΔT =  15°C

Q = 522 g ×4.18 J/g.°C× 15°C

Q =  1379.4 J

5 0
2 years ago
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I think the answer for #3 is A not 100% sure but hope I can help!
6 0
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Explain how a water strider can float on the surface of water without sinking.
Rainbow [258]

Answer:

low weight and great area

Explanation:

8 0
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