In the following reaction, what element is made?
2 answers:
Answer: The correct answer is option (A).
Explanation:
General representation of an element:
A= Atomic mass of the element of X.
Z = Atomic number of the element of X
X = symbol of the element.
According to Law of Conservation of Mass:
A = 244
Charge is balanced on both the sides:
Z = 97
The element with the atomic number 97 is Berkelium. Hence, the correct answer is option (A).
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copper is limiting
Explanation:
Answer:
mass (m) of the snow that the backpacker collected= 0.855 kg
Explanation:
Given that:
Q = 643 kJ = 643000 J
ΔHfusion = 6.02 kJ/mol = 6020 J/mol
number of mole of water H2O =
c = 4.18 J/g⋅K
ΔT = 100 K
Since there is a phase change from solid to liquid; then :
ΔH =
However without the given mass; we substitute for the number of moles; so:
Q =
m = 855 g
m = 0.855 kg
mass (m) of the snow that the backpacker collected= 0.855 kg