Answer:
The mass number is defined as the total number of protons and neutrons in an atom. The number of neutrons = mass number − atomic number.
The answer is true
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Answer:
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Answer:
1.3 M
Explanation:
The formula mass of lithium fluoride is 7+19=26 g/mol. This means that in 52 grams of LiF, there is 2 moles.
Molarity = (moles of solute)/(liters of solution), so the answer is 2/1.5 = <u>1</u><u>.</u><u>3</u><u> </u><u>M</u>
N= number of molecules
n= 2.3x10^23/6.022x10^23
= 0.381 mol
Now,
M= molar mass in g/mol
m= mass in grams
m=nxM
=0.381 molx137 g/mol
= 52.197g
So, the correct answer should be C