Advertisements
Advertisements
Question
The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.
Advertisements
Solution
The relative atomic mass of Cl atom is 35.5 a.m.u. because chlorine consists of a mixture of two isotopes of masses 35 and 37 in the ratio of 3 : 1.
The average of the isotopic masses is 35 x 3 + 37 x 4 = 35.5
Concept Insight: Isotopes are atoms of same having same atomic number but different mass number.
APPEARS IN
RELATED QUESTIONS
Convert into mole.
22 g of carbon dioxide
What name is given to the amount of substance containing 6.022 × 1023 particles(atoms,molecules or ions) of a substance ?
How many moles of O2 are there in 1.20 × 1022 oxygen molecules ?
Show by means of calculations that 5 moles of CO2 and 5 moles of H2O do not have the same mass. How much is the difference in their masses ?
Which of the following correctly represents 360 g of water ?
- 2 moles of H2O
- 20 moles of water
- 6.022 × 1023 molecules of water
- 1.2044 × 1025 molecules of water
Calculate the weight of one molecule of oxygen.
[Avogadro’s number = 6 × 1023, O = 16 ]
Two oxides of a metal (M) have 20.12% and 11.19% oxygen. The formula of the first oxide is MO. Determine the formula of the second oxide.
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.
Calculate the number of oxygen atoms in 0.10 mole of Na2CO3 . 10H2O.
Raunak took 5 moles of carbon atoms in a container and Krish also took 5 moles of sodium atoms in another container of same weight.
- Whose container is heavier?
- Whose container has more number of atoms?
