Heat required for a system
can be calculated by the product of the specific heat, temperature difference
and the mass of the system. We calculate it as follows:
Q
= mCΔT
Q
= 50(0.06)(1)
Q
= 3 calories
<span>Therefore,
the correct answer from the choices listed is the second option, 3 calories.</span>
average atomic mass of Cu = 63.54
Explanation:
average atomic mass = atomic mass of isotope 1 × abundance of isotope 1 + atomic mass of isotope 2 × abundance of isotope 2 +...+ atomic mass of isotope n × abundance of isotope n
average atomic mass of Cu = atomic mass of Cu-63 × abundance of isotope Cu-63 + atomic mass of isotope Cu-65 × abundance of isotope Cu-65
average atomic mass of Cu = 62.93 × (69.17 / 100) + 64.93 × (30.83 / 100)
average atomic mass of Cu = 63.54
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average atomic mass
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<span>37.9968064 ± 0.0000010 g/mol</span>
