THE MOLE CONCEPT

35.5g of Cl is equal to how many moles?

• 0

• 2

• 3

• 1

Which of the following is not true about Avogadro and his concepts?

• He was a french scientist

• He randomly obtained the value of 1 mole

• Value of 1 mole = 6.022x10²³

• Value of a mole is fixed

Who coined the word 'mole'?

• Avogadro

• Wilhelm Ostwald

• Lavoisier

• IUPAC

1 gross=

• 24 units

• 124 units

• 144 units

• 36 units

12u of carbon has

• 1 atom

• 1 mole

• 6.022x10²³ atoms

• 1 molecule

Which one will have maximum numbers of water molecules?

• 18 molecules of water

• 18 grams of water

• 18 moles of water

• 1.8 grams of water

A student needs 9.8g of  $H_2SO_4$   for an experiment. How many moles is this?

• 1

• 0.1

• 3

• 0.5

What's SI unit for amount of a substance?

• Avogadros number

• kilogram

• mole

• liter

What is the molar mass of NaCl?

• 58.5g/mol

• 28g/mol

• 12g/mol

• 6.02 x 10²³

An Avogadro's number of water molecules is equal to all EXCEPT _________.

• 1 mole of water molecules

• 2 moles of Hydrogen atoms and 1 mole of oxygen atoms

• 25 grams of water

• 18 molecules of water