Molar Mass

Q.

What is the molecular mass of glucose molecule $\left({\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6\right)$?

Q.

Calculate the molar mass of sulfur.

Q.

Calculate the molecular mass of CH₄.

Q.

What is the molar mass of potassium permanganate?

Q.

Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040 (assume the density of water to be one).

Q. Question 6(d)
Calculate the molar mass of the following substances:
(d) Hydrochloric acid, HCl

Q.

What is the molecular weight of oxygen?

Q.

What is the molecular mass and molar mass of Carbon Monoxide?

Q. What is the molecular mass of calcium carbonate?

1. $90\text{u}$
2. $80\text{u}$
3. $100\text{u}$
4. $110\text{u}$

Q.

how 1 amu is equivalent to gram/mole

Q. Question 6(c)
Calculate the molar mass of the following substances:
(c) Phosphorus molecule, $P_4$ (atomic mass of phosphorus = 31)

Q.

Calculate the mass of a mole of carbon dioxide.

Q.

What is the molar mass of ${\left({\mathrm{NH}}_4\right)}_2{\mathrm{CO}}_3$?

Q.

Aspirin has the formula ${\mathrm{C}}_9{\mathrm{H}}_8{\mathrm{O}}_4$. How many atoms of oxygen are there in a tablet weighing 360mg?

Q.

Calcium chloride when dissolved in water dissociates into its ions according to the following equation. ${\mathrm{CaCl}}_2\left(\mathrm{aq}\right)\to {\mathrm{Ca}}_{}^{2+}\left(\mathrm{aq}\right)+2{\mathrm{Cl}}_{}^{-}\left(\mathrm{aq}\right)$. Calculate the number of ions obtained from ${\mathrm{CaCl}}_2$ when $222\mathrm{g}$ of it is dissolved in water.

Q.

Find the molar mass of calcium carbonate by calculation.

Q.

Calculate the molar mass of MnO₂.

Q.

The mass of ammonia in grams produced when $2.8\mathrm{kg}$of dinitrogen quantitatively reacts with $1\mathrm{kg}$ of dihydrogen is

Q.

Calculate the relative molecular mass of H₂S.

Q.

Calculate the molecular mass of ${\mathrm{Cl}}_2$

Q.

Calculate the molecular mass of- ${\mathrm{NH}}_3,{\mathrm{CO}}_2,\mathrm{HCl},{\mathrm{Cl}}_2$

Q.

Calculate the number of moles in 5g of Calcium carbonate(CaCO₃)?

Q. Calculate the gram molecular weight of $C_6{H}_6$

1. 78 u
2. 98 u
3. 78 g
4. 98 g

Q.

Define 1 mole.

Q.

Calculate the number of moles present in 34g of Ammonia?

Q.

Calculate the molar mass of : (a) Ethyne

Q.

What is the molecular mass of cane sugar?

Q.

Question 26
Calcium chloride when dissolved in water dissociates into its ions according to the following equation.

$CaC{l}_2\left(aq\right)\to C{a}^{2+}\left(aq\right)+2C{l}^{-}\left(aq\right)$

Calculate the number of ions obtained from $CaC{l}_2$ when 222 g of it is dissolved in water.

Q. What is the number of oxygen atoms present in 126 g of ${HNO}_3$?

1. $16.132\times {10}^{23}$
2. $36.132\times {10}^{23}$
3. $9.033\times {10}^{23}$
4. $120.44\times {10}^{23}$

Q.

Calculate the molecular mass of hydrogen bromide ($\mathrm{HBr}$). (Atomic masses:$\mathrm{H}$ = 1 u; $\mathrm{Br}$= 80 u)