Answer:
5.20 grams of Br₂
Explanation:
From our previous knowledge;
We understand that:
The number of moles of a given element = mass of the element divided by its molar mass.
Mathematically:
From the given information, let's assume that the 0.065 moles of liquid -bromine partake in the reaction.
From the periodic table, the molar mass of Bromine is = 79.9 g/mol
As such, the mass of liquid that partakes is calculated as:
0.065 mol = mass/ 79.9 g/mol
mass = 0.065 mol × 79.9 g/mol
mass of liquid that partakes in the reaction = 5.20 grams of Br₂
b.casuality since scientists test everything out
The molarity of her solution will be 1.88 M
<h3>What is Molarity ?</h3>
Molarity is defined as the number of moles of solute dissolved in per litre of solution.
Molarity of the solution = number of moles of solute / volume of solution in litre
number of moles of solute = given weight / molecular weight
= 43.3 / 45.95
= 0.942 moles
Now, lets calculate Molarity ;
Molarity of the solution = number of moles of solute / volume of solution in litre
= 0.942 / 0.500
= 1.88 M
Hence, The molarity of her solution will be 1.88 M
Learn more about Molarity here ;
brainly.com/question/2817451
#SPJ1
Answer:
P=atm
Explanation:
The problem give you the Van Der Waals equation:
First we are going to solve for P:
Then you should know all the units of each term of the equation, that is:
where atm=atmosphere, L=litters, K=kelvin
Now, you should replace the units in the equation for each value:
Then you should multiply and eliminate the same units which they are dividing each other (Please see the photo below), so you have:
Then operate the fraction subtraction:
P=
And finally you can find the answer:
P=atm
Now solving for b:
Replacing units:
Multiplying and dividing units,(please see the second photo below), we have: