Advertisements
Advertisements
प्रश्न
Calculate the molar mass of the following substance:
Ethyne, C2H2
Advertisements
उत्तर
The molar mass of C2H2
= 2 × atomic mass of C + 2 × atomic mass of H
= (2 × 12 + 2 × 1) u
= (24 + 2) u
= 26 u
संबंधित प्रश्न
What name is given to the amount of substance containing 6.022 × 1023 particles(atoms,molecules or ions) of a substance ?
If 0.2 mol of the following substance is required how many grams of that substance should be taken?
Sodium chloride
Fill in the blank
Avogadro's number is equal to ______
Calculate the number of moles and number of molecules present in 1.4 g of ethylene gas. What is the volume occupied by the same amount of ethylene?
Find the number of molecules in 1.8 g of H2O.
From the equation for burning of hydrogen and oxygen
\[\ce{2H2 + O2 -> 2H2O}\] (Steam)
Write down the number of mole (or moles) of steam obtained from 0.5 moles of oxygen.
Calculate the number of moles in 7g of nitrogen.
Match the following.
| 1. | 8 g of O2 | - | 4 moles |
| 2. | 4 g of H2 | - | 0.25 moles |
| 3. | 52 g of He | - | 2 moles |
| 4. | 112 g of N2 | - | 0.5 moles |
| 5. | 35.5 g of Cl2 | - | 13 moles |
The visible universe is estimated to contain 1022 stars. How many moles of stars are present in the visible universe?
Deduce the number of molecules of the following compound in the given quantity.
8.8g carbon dioxide
