Answer:
47.74 g
Explanation:
Given data:
Formula units of SrF₂ = 2.31 ×0²³
Mass of SrF₂ = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ formula units
2.31 ×0²³formula units × 1 mol / 6.022 × 10²³ formula units
0.38 mol
Mass of SrF₂:
Mass = number of moles × molar mass
Mass = 0.38 mol × 125.62 g/mol
Mass = 47.74 g
First you need to know the molecular weight of sugar (C6H12O6) which is 180.156g/mol
You have half a mole so you have 90.078g
If you wanted to make 1L of a 1.2M solution of glucose you would need 180.156*1.2=216.1872g
But you only have 90.078g
So you need to figure out how much this 90.078g will make if the solution must be 1.2M:
90.078g/216.1872g=xL/1L
solve for the X and you get 0.416666666...
so 416.7ml or 0.417L
Answer:
The answer would be the hawk.
Explanation:
First-order consumers directly depends on grass or plants for survival.
A hawk gets its food from eating animals.
Again, hope this helps :D
Answer: a) 49.8 gram
b) 47.0 %
Explanation:
First we have to calculate the moles of glucose
The balanced chemical reaction will be,
From the balanced reaction, we conclude that
As,1 mole of glucose produce = 2 moles of ethanol
So, 0.54 moles of glucose will produce = mole of ethanol
Now we have to calculate the mass of ethanol produced
Now we have to calculate the percent yield of ethanol
Therefore, the percent yield is 47.0 %