Based on the periodic table why are be, bg, ca and sr in the same column/group/family?
1 answer:
You might be interested in
Answer:
0.19615 M
Explanation:
Calculation of the moles of as:-
Mass = 10.91 g
Molar mass of = 278.1 g/mol
The formula for the calculation of moles is shown below:
Thus,
According to the reaction shown below:-
1 mole of is produced when 1 mole of
undergoes reaction.
0.03923 mole of is produced when 0.03923 mole of
undergoes reaction.
Mole of = 0.03923 mole
Volume = 200.0 mL = 0.2 L ( 1 mL = 0.001 L )
Molarity is defined as the number of moles present in one liter of the solution. It is basically the ratio of the moles of the solute to the liters of the solution.
The expression for the molarity, according to its definition is shown below as:
So,
<u>0.19615 M is the molarity of the solution.</u>
Hey there!
One mole of magnesium has a mass of 24.31 g.
This is 6.022 x 10²³ atoms of magnesium.
We want to convert 9.00 x 10²² atoms to moles.
For every one mole of magnesium, there are 6.022 x 10²³ atoms, so divide:
(9.00 x 10²²) ÷ (6.022 x 10²³) = 0.15 moles
Convert 0.15 moles to grams.
For every mole, there is 24.31 g.
So we multiply by 24.31. Also note that I am using the number stored in the calculator and not the rounded number I put.
0.15 × 24.31 = 3.6
The mass of 9.00 x 10²² atoms of Mg is 3.6 grams.
Hope this helps!