<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:
The geometric shape of a CH4 molecule distributes the charges symmetrically.
Explanation:
The dipole moment is ruled by the compound's geometry and elements electronegativity difference.
Arranging the forces acording to the elements electronegativity difference withing the molecule geometry will yeld the dipole moment.
If the forces cancel out, it is a nonpolar compound.
If the forces does not cancel out it is a polar compound.
Picture of such analysis for methane is attached.
Answer:
C: The atomic nucleus contains most of the mass.
Answer: 3.97 moles HCl
Explanation: Solution:
2.39x10²⁴ atoms HCl x 1 mole HCl /
6.022x10²³ atoms HCl
= 3.97 moles HCl