A 5.00 gram sample of water is heated so that its temperature increases from 10.0°C to 15.0°C. What is the
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Answer:
6 mols H2 are needed
Explanation:
N2 = 28.01g/mol
H2 = 2.02g/mol
*
= 6 mol H2
Answer:
Explanation:
The unbalanced nuclear equation is
Let's write X as a nuclear symbol.
The main point to remember in balancing nuclear equations is that the sums of the superscripts and of the subscripts must be the same on each side of the reaction arrow.
Then
235 = 4 + A , so A = 235 - 4 = 231, and
92 = 2 + Z , so Z = 92 - 2 = 90
And your nuclear equation becomes
Element 90 is thorium, so