How many chlorine atoms are in 1.00 mL of CCl4 (M = 153.8, density = 1.59 g mL–1)?

1. 1.56 × 1021
2. 6.23 × 1021
3. 1.57 × 1022
4. 2.49 × 1022
Subtopic:  Moles, Atoms & Electrons |
From NCERT
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If Avogadro number $$N_{A}$$, is changed from $$6 . 022 \times \left(10\right)^{23}$$$$\text{mol}^{- 1}$$ to $$6 . 022 \times \left(10\right)^{20} ~\text{mol}^{- 1}$$ this would change:

 1 The definition of mass in units of grams 2 The mass of one mole of carbon 3 The ratio of chemical species to each other in a balanced equation 4 The ratio of elements to each other in a compound
Subtopic:  Moles, Atoms & Electrons |
72%
From NCERT
NEET - 2015
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The maximum number of atoms is present in which of the following -

1. 1 g of Mg(s)

2. 1 g of O2 (g)

3. 1 g of Li(s)

4. 1 g of Ag(s)

Subtopic:  Moles, Atoms & Electrons |
79%
From NCERT
NEET - 2020
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Which one of the following samples of gases contains the most particles?
All gases are at 0 °C and 1 atm pressure when 1 mole of gas has a volume of 22.4 L.

[Relative atomic mass, Ar : H = 1, He = 4, C = 12, O = 16, Cl = 35.5]

1. 33.6 L of chlorine gas
2. 66.0 g of carbon dioxide gas
3. 22.4 L of hydrogen gas
4. 10.0 g of helium gas
Subtopic:  Moles, Atoms & Electrons |
51%
From NCERT
Hints

One mole of oxygen gas at STP is equal to:

 (a) 6 .022× 1023 molecules of oxygen (b) 6.022 × 1023 atoms of oxygen (c) 16 g of oxygen molecule (d) 32 g of oxygen

Choose the correct answer from the option given below:

 1 (a) and (b) 2 (a) and (c) 3 (a) and (d) 4 (c) and (d)
Subtopic:  Moles, Atoms & Electrons |
74%
From NCERT
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