Percentage of argon in air by volume
A) 20.9%
B) 78.1%
C) 0.03%
D) 0.9%
1 Answers
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If there is an error of 0.1% in the measurement of the radius of a sphere, find approximately the percentage error in the calculation of the volume of
Correct Answer - 0.003
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Calculate the average atomic mass of argon from the following data :
Average atomic mass of argon (Ar) = \(\frac{(At.\,mass\,of\,^{36}Ar \times \%Abundance)+(At.\,mass\,of\,^{38}Ar \times \%Abundance)+(At.\,mass\,of\,^{40}Ar \times \%Abundance)}{100}\) \(=\frac{(35.96755u \times 0.337)+(37.96272u\times 0.063)+(39.9624u \times 99.60)}{100}\) = 39.947 g mol-1
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Calculate the number of atoms in each of the following. i. 52 moles of Argon (Ar) ii. 52 u of Helium (He)
i. 52 moles of Argon 1 mole Argon atoms = 6.022 × 1023 atoms of Ar ∴ Number of atoms = 52 mol × 6.022 × 1023 atoms/mol = 313.144 × 1023 atoms...
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The percentage of carbon dioxide in exhaled air is ………
The percentage of carbon dioxide in exhaled air is 4.4
1 Answers 1 views
The percentage of oxygen in inhaled air is
The percentage of oxygen in inhaled air is 21%
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Percentage of oxygen in air by volume ………………
Correct option is A) 20.9%
2 Answers 1 views
Percentage of nitrogen in air by volume ………………
Correct option is B) 78.1%
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80 ml of solution contains 20 gr of solute. The mass by volume percentage of the solution is
Correct option is C) 25%
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Match the following. a) Carbon b) Argon
A) a → 4, b → 1, c → 2, d → 3
2 Answers 1 views
Two equal like charges in air repel eachother with a force F. By what percentage should each charge be reduced so that the force between them in mediu
This display of light is often called sparking. It occurs due to electric discharge of the electrostatic changes produced in chewing the winter green life saver.
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