How many joules of heat are required to heat 125 g aluminum from 19.0°C to 95.5°C?
2 answers:
<u>Answer:</u> The amount of heat required is 8625.4 J
<u>Explanation:</u>
To calculate the heat required, we use the equation:
where,
q = heat required = ?
m = mass of aluminium = 125 g
c = specific heat capacity of aluminium = 0.902 J/g.°C
= change in temperature =
Putting values in above equation, we get:
Hence, the amount of heat required is 8625.4 J
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<h2>Answer:</h2>
Compound. Option A is correct
<h2>Explanations:</h2>
When two or more different elements combines, a compound is formed. For instance, if carbon and oxygen combines, carbondioxide is formed according to the equation;
From the reaction, carbon and oxygen are the elements while carbondioxide is the compound. Hence we can conclude that a pure substance formed when two or more different elements combine called compound.
Hello!
The half-life is the time of half-disintegration, it is the time in which half of the atoms of an isotope disintegrate.
We have the following data:
mo (initial mass) = 53.3 mg
m (final mass after time T) = ? (in mg)
x (number of periods elapsed) = ?
P (Half-life) = 10.0 minutes
T (Elapsed time for sample reduction) = 25.9 minutes
Let's find the number of periods elapsed (x), let us see:
Now, let's find the final mass (m) of this isotope after the elapsed time, let's see:
I Hope this helps, greetings ... DexteR! =)