<span>Answer: 0.070 m/s
Explanation:
1) balanced chemical equation:
given: 2HBr(g) → H2 (g)+Br2(g)
2) Mole ratios:
2 mol HBr : 1 mol H2
3) That means that every time 2 moles of HBr disappear 1 mol of H2 appears.
That is, the H2 appears at half rate than the HBr disappears.
∴ rate of appearance of H2 = rate of disappearance of HBr / 2 = 0.140 m/s / 2 = 0.070 m/s, which is the answer.</span>
Answer:
C) 7 to 1
Explanation:
The periodic trend of Atomic Radii for the Periodic Table of Elements is down and to the left the atomic radii increases.
So, from period 1 to 7 and group 18 to group 1, the atomic radii increases.
The opposite (decreasing) would be from period 7 to 1 and group 1 to group 18.
Therefore, our answer is C.
Answer:
Unbalanced
Explanation:
You need to have the same number of atoms on both sides for it to be balanced
