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Calculate the number of molecules in 210 grams of H2O

Sagot :

Tcloutier9
H2O=18.01g/mole. 210g divided by 18.01g/mole=11.653mole. 1 mole has 6.22x10^23 molecules. So there is 11.653x(6.22x10^23) molecules. Just multiply 11.653 by 6.22. Then put it as answerx10^23 molecules
mahima6824soni

The number of molecules in 210 grams of H₂O is 72.48 x 10²⁴.

What are moles?

The mole is a SI unit of measurement that is used to calculate the quantity of any substance. The number of models of any substance can be calculated by dividing the mass by the molar mass of the substance or compound.

Mole = mass / molar mass

Given the mass of water is 210 grams

The molar mass of water is 18.01g/mole

The mass and the molar mass will be divided.

210 / 18.01g = 11.653 mole

Now, here 1 mole is 6.22 x 10²³ molecules, so the 6.22 x 10²³ will be multiplied by the 11.653 to get the molecules of 210-gram water.

1 mole has 6.22 x 10²³  molecules

11.653 mole x 6.22 x 10²³ = 72.48 x 10²⁴

Thus, the number of molecules of H₂O is 72.48 x 10²⁴.

To learn more about moles, refer to the link:

https://brainly.com/question/21323029

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