Advertisements
Advertisements
प्रश्न
One of the following elements has an atomicity of ‘one’. This element is :
विकल्प
helium
hydrogen
sulphur
ozone
Advertisements
उत्तर
Helium
The atomicity of Helium (He) is 1.
APPEARS IN
संबंधित प्रश्न
If the aluminium salt of an anion X is Al2X3, what is the valency of X ? What will be the formula of the magnesium salt of X ?
Which of the following pair of elements represents a mole ratio of 1 : 1 ?
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)
NH4NO3 → N2O + 2H2O
What volume of dinitrogen oxide is produced at the same time as 8.96 L of steam?
Find the number of molecules in 3.2 g of SO2.
How many grams of H2O are present in 0.2 mole of it?
A student puts his signature with a graphite pencil. If the mass of carbon in the signature is 10-12 g, calculate the number of carbon atoms in the signature.
Solid ammonium dichromate decomposes as:
\[\ce{(NH4)2Cr2O7 -> N2 + Cr2O3 + 4H2O}\]
If 63 g of ammonium dichromate decomposes. Calculate the quantity in moles of nitrogen formed.
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 |
N2 + 3H2 → 2NH3
(The atomic mass of nitrogen is 14, and that of hydrogen is 1)
1 mole of nitrogen (______ g) +
3 moles of hydrogen (______ g) →
2 moles of ammonia (______ g)
The visible universe is estimated to contain 1022 stars. How many moles of stars are present in the visible universe?
