Question

Calculate number of molecules present in 3.5 moles of water.​

Answer 1

Answer:

21  ×  $10^{23}$

Explanation:

There are 6.022 ×  $10^{23}$  water molecules in one mole of water.

So in 3.5 moles of water, there are 6.022 ×  $10^{23}$   ×  3.5

Which is equal to-

21  ×  $10^{23}$  molecules of water

Answer 2

The number of molecules present in 3.5 moles of water. is equal to 2.11 × 10²⁴

Explanation:

• According to Avogadro’s Number, we have the 1 mole of any substance will be equal to $6.022$ x$10^{23}$
• one mole of each substance contains Na =$6.022$ x$10^{23}$
• ​The units present will be equal to electrons, atoms, ions, or molecules, depending on the nature of the substance.

• 1 mole of molecules = 6.022 × 10²³ molecules
• Given 3.5 moles of water.
• = 3.5 moles H₂O × 6.022 × 10²³ H₂O molecules/mol H₂O
• = 2.11 × 10²⁴ H₂O molecules.
• #SPJ3