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krok68 [10]
3 years ago
8

A water sample has a pH of 8.2 and a bicarbonate concentration of 97 mg/L. What is the alkalinity of the sample in moles/L and i

n mg CaCO3/L?
Chemistry
1 answer:
goldfiish [28.3K]3 years ago
3 0

Answer:6.94

Explanation:

Molar mass of CaCO3=40+12+16×3

=40+12+48=100g/mol

Moles=mass of substance/molar mass

=97mg/100g=0.097/100=0.00097moles/L.

PH=-log[CaCo3]=-log(0.00097)=6.94

P.s it's log to base e

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% error = \frac{|experimental - theoretical|}{theoretical} x 100%

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The temperature of a 500. ml sample of gas increases from 150. k to 350. k. what is the final volume of the sample of gas, if th
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3 years ago
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Which of the following pairs of compounds have the same empirical formula?
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Answer:

option a and c both are correct

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6 0
2 years ago
HELP ASAP
Virty [35]
 <span>To find the molar mass, look at a periodic table for each element. 
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C: 13 * 12.01 
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Next, you have 200mg in each tablet, with a ratio of C13H18O2 (molar mass) in GRAMS per Mole 
So, you need to convert miligrams into grams, which is 200 divided by 1000. 
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This is a cross multiplying ratio where you're going to solve for the unknown moles of grams per tablet compared to the moles per ibuprofen. 
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or 9.7 * 10^-4 moles 

The last problem should be easy to figure out now that you have the numbers. 1 dose is 2 tablets, which is the moles we just calculated above, times four for the dosage. 
</span>
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2 years ago
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This is the same simplified formula, only balanced:

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3 0
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