Answer:
Explanation:
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Based on the given reaction, since magnesium and water are in a 1:2 molar ratio at the reactants, we must apply the following stoichiometric factors to compute the complete reaction of the 6.0 g of magnesium:
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3.91584 molecules in 122g of Cu(NO3)2
Definitions needed:
pH = -log[H^+]
pOH = -log[OH^-]
pH + pOH = 14
[H^+]*[OH^-] = 10^-14
(a) [H+] = 3.0 10-13 M
[OH ‾ ] = _____ M
Acidic, Basic, or Neutral?
[H^+]*[OH^-] = 10^-14
[OH^-] = (10^-14)/[H^+]
[OH^-] = (10^-14)/(3.0 10-13 M) = 0.033 M
That's a high concentration of [OH^-], so the solution is basic
(b) [OH ‾ ] = 3.0 10-7 M
[H+] = ______M
Acidic, Basic, or Neutral?
[H^+]*[OH^-] = 10^-14
[H^+]* = (10^-14)/[OH^-]
[H^+]* = (10^-14)/(3.0 10-7 M) = 3.33 x 10^-8
That would be a slightly basic solution (pH just higher than 7).
Answer:
The earth's crust is the thickest under high mountains.
The total width of the crystal is determined by multiplying the spacing which is equal to 18.1 x 10^-9 m by the total number of molecules.
Width = (18.1 x 10^-9 m)(108)
The simplification of the operation above will give us an answer of 1.958 x 10^-6 m. We can convert this to millimeters as below,
(1.958 x 10^-6 m)(1000 mm/1 m)
= 1.9548 x 10^-3 mm
<em>Answer: 1.9548 x 10^-3 mm</em>