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What are the limitations of seed banks?

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Anna [14]3 years ago

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Which symbol represents a particle that has the same total number of electrons as S2-?

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3 years ago

What is the relationship between mole, Avogadro number and mass?

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Answer:

The mass of one mole of a substance is equal to that substance's molecular weight. ... water is 18.015 atomic mass units (amu), so one mole of water weight 18.015 grams. ... Avogadro's number is a proportion that relates molar mass on an atomic ... one molecule of water (H2O), one mole of oxygen (6.022×1023 of O atoms)

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3 years ago

Calculating molarity using solute moles A chemist prepares a solution of sodium chloride (NaCl) by measuring out 6.89 mol of sod

hram777 [196]

Answer: Concentration of the chemist's sodium chloride solution is 34.4 mol/L.

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n= moles of solute

$V_s$ = volume of solution in ml

Given : moles of $NaCl$ = 6.89

volume of solution = 200 ml

Putting in the values we get:

$Molarity=\frac{6.89\times 1000}{200}=34.4mol/L$

Thus the concentration of the chemist's sodium chloride solution is 34.4 mol/L.

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3 years ago