mass of 1 mole of N is 14g
so mass of 3.45 mole is
3.45 × 14 = 48.3 g
We require the information related to atomic mass of the compound and the number of each element present in the compound.
Option A
<u>Explanation:</u>
Molar mass is the amount of any compound present in a given sample. So we can determine the molar mass of any compound by the ratio of atomic mass of the compound to the amount of compound or element present in the sample.
So it can be defined as the mass of the compound in a given sample with respect to the number of elements present in that sample. Thus, we require the information related to atomic mass of the compound and the number of each element present in the compound.
Answer:
0.897 J/g.⁰C
Explanation:
Given the following data:
m = 170 g (mass)
ΔT = 20.0⁰C (change in temperature)
q = 3050 J (amount of heat)
The amount of heat (q) is calculated as follows:
q = m x Cp x ΔT
Thus, we introduce the data in the mathematical expression to calculate the specific heat (Cp):
Cp = q/(m x ΔT) = 3050 J/(170 g x 20.0⁰C) = 0.897 J/g.⁰C
<span>Colligative properties are properties of solutions that depend on the number of molecules [or ions] in a given volume of solvent and not on the properties (e.g. size or mass) of the compound. Colligative properties include: lowering of vapor pressure; elevation of boiling point; depression of freezing point and osmotic pressure.</span>
Answer:
2.5 L will be the volume of HNO₃
Explanation:
To find out the total volume of nitric acid in liters we begin from molarity.
HNO₃ solution is 0.10 M
This means that 0.10 moles are contained in 1L of solution.
As we used 0.25 moles of nitric, let's determine the volume by a rule of three:
0.10 moles of nitric acid are contained in 1L of solution
0.25 moles of nitric acid will be contained in (0.25 . 1) / 0.1 = 2.5 L