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Sever21 [200]
3 years ago
5

: How much energy is required to heat an iron nail with a mass of 25.5 grams from 65°C until it becomes red hot at 720°C?

Chemistry
1 answer:
Evgen [1.6K]3 years ago
8 0

Q = mct  

-Q= energy in Joules  

-m = mass in grams  

-c= specific heat capacity in J/g degree C  

-t = delta temperature in degrees Celsius  

So,  

Q = m c t  

Q = (7 grams)(0.448J/g C)(750 C - 25 C)  

Q = 2273.6 J  

Your final answer = 2273.6 Joules

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Calculate the number of atoms in 52g of He.​
MissTica

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78.3 × 10²³ atoms of helium are present in 52 g.

Explanation:

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