Answer: The molality of solution is 1.2 mole/kg
Explanation:
Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent.
where,
n = moles of solute
= weight of solvent in kg
Given : 10 g of glycerol is present in 100 g of solution
moles of glycerol =
mass of water (solvent )= (100-10) = 90 g = 0.09 kg
Now put all the given values in the formula of molality, we get
Therefore, the molality of solution is 1.2 mole/kg
Answer :
Explanation : When diatomic hydrogen gas and diatomic nitrogen gas reacts spontaneously it forms ammonia gas as the product.
we will have the following reactions; As all the reactants and products are in the gaseous state the subscript (g) is given to the molecules.
But this is not a balanced equation, as on the right side of reactants we have 2 hydrogen atoms and 2 nitrogen atoms which gives the product which has one nitrogen and three hydrogen in the compound state.
So, balancing the equation, we get,
We multiplied 2 with the diatomic hydrogen molecule which resulted in production of 2 moles of ammonia as the product.
So, the complete balanced equation is;