Answer:
29.88 g/mol
Explanation:
Lithium has molar mass of 6.94 g/mol and oxygen has weight of 16 g/mol. Since there are 2 lithium, Li would be 13.88 g/mol and 13.88+16=29.88 g/mol
The Richter scale is logarithmic, meaning that for every whole number increase on the Richter scale, the 'power' of the earthquake increases by a factor of 10.
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Answer:
When titanium (II) nitride forms an ionic compound, TiN is the chemical formula of the compound.
pH value of a 0. 011 m naf solution is 8.57.
Solution
This problem uses the relationship between Kb and the dissociation constants which is expressed as Kw = KaKb. Calculations are as follows:
Kb = KaKb
1.00 x 10^-14 = 7.2 x 10^-4(x)
x = 1.39 x 10^-11
We now need to calculate the [OH¯] using the Kb expression:
1.39 x 10^-11 = x^2 / (0.30 - x)
The denominator can be neglected. Thus, x is 3.73 x 10^-6.
pOH = -log 3.73 x 10^-6 = 5.43
pH = 14-5.43 = 8.57
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Answer:
If you want the first option you need 2.5M.
If you want the second, you will end up with 120ml so your starting solution is:
0.5x (120/20) = 3.0M
This assumes that there’s no loss of volume on mixing. To remove that uncertainty, start with the 20ml of acid and add water, mixing, till you get the right volume.