Answer:
The concentration of arsenic in the sample in parts per billion (ppb) is 11.1538 .
Explanation:
Density of the lake water =
Amount of arsenic in 14.3 of water = 159.5 ng =
Mass of the lake water:
Concentration in parts per billion:
parts per billion
The concentration of arsenic in the sample in parts per billion (ppb) is 11.1538.
To minimize the sharp pH shift that occurs when a strong acid is added to a solution, IT IS PRACTICAL TO ADD A WEAK BASE.
When a strong acid is added to a solution, it usually brings about a sharp change in the pH of the concerned solution. To avoid this, one can add a weak base to the solution first. The weak base will serves as a buffer for the strong acid and prevents the solution from experiencing sharp pH variations.
3.01× 1024 particles are the number of particles are there in 5 grams of sodium carbonate.
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How many particles are there in 5 grams of sodium carbonate?</h3>
There are 6.022 × 1023 particles in one gram of a substance according to Avogadro's number. So when we find out for 5 grams, then we multiply 5 with 6.022 × 1023, we get 3.01 × 1024 particles. For one gram atomic weight of hydrogen, one mole of hydrogen contains 6.022 × 1023 hydrogen atoms.
So we can conclude that 3.01× 1024 particles are the number of particles are there in 5 grams of sodium carbonate.
Learn more about particles here: brainly.com/question/11066673
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B. He would be considered an Organic Chemist since Organic Chemistry is the study of Carbon and its compounds.