Advertisements
Advertisements
प्रश्न
The mass of one steel screw is 4.11g. Find the mass of one mole of these steel screws. Compare this value with the mass of the Earth (5.98 × 1024kg). Which one of the two is heavier and by how many times?
Advertisements
उत्तर
Mass of 21 screw = 4.11 g
Mass of 1 mole of screws = 4.11 × 6.022 × 1023
= 2.475 × 1024 g
= 2.475 × 1021 kg
`("Mass of earth")/("Mass of 1 mole screws") = (5.98 xx 10^24"kg")/(2.475 xx 10^21 "kg")`
= 2416
It shows that mass of earth is 2416 times more than the mass of one mole of screws.
APPEARS IN
संबंधित प्रश्न
Calculate the molecular mass of Cl2.
Calculate the formula unit mass of K2CO3 given the atomic mass of
- Zn = 65 u
- Na = 23 u
- K = 39 u
- C = 12 u
- O = 16 u
What is the significance of the formula H2O ?
Calculate the molecular masses of the following :
Oxygen, O2
(Atomic masses : H = 1 u ; O = 16 u ; Cl = 35.5 u ; N = 14 u ; C = 12 u)
The mass of one molecule of a substance is 4.65 × 10–23 g. What is its molecular mass ? What could this substance be ?
Calculate the relative molecular mass of ZnCO3.
[Zn = 65, O = 16, C = 12]
Calcium carbonate is decomposed on heating in the following reaction
CaCO3 → CaO + CO2
How many moles of Calcium carbonate is involved in this reaction?
Calcium carbonate is decomposed on heating in the following reaction
CaCO3 → CaO + CO2
Calculate the gram molecular mass of calcium carbonate involved in this reaction.
The modem atomic mass scale is based on ______.
Calcium carbonate react with dilute hydrochloric acid as given below:
\[\ce{CaCO3 + 2HCl -> CaCl2 + H2O + CO2}\]
How many moles of \[\ce{HCl}\] will react with 5 moles of calcium carbonate?
