The mole concept and the molar relationship

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The conversion between mole, mass, representative particles and volume

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sameh Ali

Saudi Arabia

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The mole concept and the molar relationship


The mole concept and the molar relationshipOnline version The conversion between mole, mass, representative particles and volume by sameh Ali 1 If a sample contains 1.806 x 10^24 atoms of Magnesium (), how many moles of Mg are present? (Note: Use Avogadro's number: 6.02×10 ^23 representative particles/mole) a 3.00 moles b 0.300 moles c 1.00 mole d 6.02 moles 2 Assuming Hydrogen (H) has a molar mass of approximately 1.00 g/mol and Oxygen (O) has a molar mass of approximately 16.00 g/mol, what is the molar mass of H2O? a 18.00 g/mol b 17.00 g/mol c 34.00 g/mol d 36.00 g/mol 3 Given a 360.36 g sample of glucose (C6H12O6), if the molar mass of glucose is 180.18 g/mol, how many moles are present in the sample? a 2.000 moles b 0.500 moles c 1.000 mole d 3.000 moles 4 If a chemist has 5.00 moles of Neon gas (Ne) at STP, what volume does the gas occupy? a 112 L b 4.48 L c 22.4 L d 122.4 L 5 Which statement accurately describes the conversion factor needed to convert 1.5 moles of sulfur trioxide (SO3 ), a molecular compound, into the number of SO3 molecules? a The conversion factor is 6.02 x 10^23/1mol resulting in 9.03×10^23 molecules b The conversion factor is 1/6.02 x 10^23 used to find the mass c The conversion factor is 6.0 x 10^23/1 mol, used to find the total number of atoms d The conversion factor is 1mol/22.4 L only applicable if SO3 is a solid 6 If the molar mass of Carbon (C) is 12.01 g/mol, what is the mass of 0.50 moles of Carbon? a 6.005 g b 12.01 g c 24.02 g d 3.0025 g 7 How many Hydrogen atoms are contained in 2.0 moles of water (H2O)? (Use Avogadro's number: 6.02×10^23 representative particles/mole a 2.408×10 ^24 H atoms b 6.02×10 ^23 H atoms c 1.204×10 ^24 H atoms d 4.816×10 ^24 H atoms 8 A sample of salt (NaCl) has a mass of 29.22 g. If the molar mass of NaCl is 58.44 g/mol, how many formula units (representative particles) of NaCl are present in the sample? a 3.01×10^23 formula units b 6.02×10^23 formula units c 1.00×10^23 formula units d 1.204×10^24 formula units 9 Consider two gas samples at STP. • Sample (1): 1.00 mole of Oxygen gas (O2, Molar Mass =32.00 g/mol) • Sample (2): 22.4 L of Hydrogen gas (H2 , Molar Mass =2.02 g/mol) Which statement comparing the properties of the two samples is true? a Both samples occupy the same volume and contain the same number of moles b ample 1 has sixteen times the mass of Sample 2, but the volume is unknown c Sample 2 contains fewer representative particles than Sample 1 d Sample 1 and Sample 2 have the same mass. 10 If 1 mole of Substance A has a molar mass of 80.0 g/mol and 1 mole of Substance B has a molar mass of 40.0 g/mol, how much mass of Substance B must be counted to contain exactly the same number of representative particles as 20.0 g of Substance A? a 10.0 g b 5.0 g c 20.0 g d 40.0 g

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The mole concept and the molar relationship

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The mole concept and the molar relationshipOnline version

by sameh Ali

If a sample contains 1.806 x 10^24 atoms of Magnesium (), how many moles of Mg are present? (Note: Use Avogadro's number: 6.02×10 ^23 representative particles/mole)

Assuming Hydrogen (H) has a molar mass of approximately 1.00 g/mol and Oxygen (O) has a molar mass of approximately 16.00 g/mol, what is the molar mass of H2O?

Given a 360.36 g sample of glucose (C6H12O6), if the molar mass of glucose is 180.18 g/mol, how many moles are present in the sample?

If a chemist has 5.00 moles of Neon gas (Ne) at STP, what volume does the gas occupy?

Which statement accurately describes the conversion factor needed to convert 1.5 moles of sulfur trioxide (SO3 ), a molecular compound, into the number of SO3 molecules?

If the molar mass of Carbon (C) is 12.01 g/mol, what is the mass of 0.50 moles of Carbon?

How many Hydrogen atoms are contained in 2.0 moles of water (H2O)? (Use Avogadro's number: 6.02×10^23 representative particles/mole

A sample of salt (NaCl) has a mass of 29.22 g. If the molar mass of NaCl is 58.44 g/mol, how many formula units (representative particles) of NaCl are present in the sample?

Consider two gas samples at STP. • Sample (1): 1.00 mole of Oxygen gas (O2, Molar Mass =32.00 g/mol) • Sample (2): 22.4 L of Hydrogen gas (H2 , Molar Mass =2.02 g/mol) Which statement comparing the properties of the two samples is true?

If 1 mole of Substance A has a molar mass of 80.0 g/mol and 1 mole of Substance B has a molar mass of 40.0 g/mol, how much mass of Substance B must be counted to contain exactly the same number of representative particles as 20.0 g of Substance A?