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Basile [38]
3 years ago
7

Boron is an element. Knowing which of the following about a typical boron atom would best help you calculate its mass?

Chemistry
1 answer:
torisob [31]3 years ago
4 0
The answer should be E.the total number of protons and neutrons in the nucleus
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If the chemist mistakenly makes 250 mL of solution instead of the 200 mL, what molar concentration of sodium nitrate will the ch
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Answer:

0.120M is the concentration of the solution

Explanation:

<em>Assuming the mass of sodium nitrate dissolved was 2.552g</em>

<em />

Molar concentration is an unit of concentration widely used in chemsitry defined as the moles of solute (In this case NaNO3) in 1L of solution.

To find this question we must find the moles of NaNO3 in 2.552g. With this mass and the volume (250mL = 0.250L) we can find molar concentration as follows:

<em>Moles NaNO3 -Molar mass: 84.99g/mol-</em>

2.552g * (1mol / 84.99g) = 0.0300 moles NaNO3

<em>Molar concentration:</em>

0.0300 moles NaNO3 / 0.250L =

<h3>0.120M is the concentration of the solution</h3>
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Answer:co2

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the particles, molecules, and gas range from smallest to largest in the following order: electron < proton < atom <...

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