What is the number of moles in 4.50 grams of H2O?

Answer 1

There are four molecules of water in 4H2O. One molecule of water is written as H2O. The subscript 2 tells you that there are two H(hydrogen) atoms. Since there is no subscript after the O there is one O(oxygen) atom.

Now back to 4H2O. The coefficient 4 tells you there are four molecules of H2O. Therefore there are eight H(hydrogen) atoms and four O(oxygen) atoms.

Answer 2

To find the number of moles in 4.50 grams of H2O, you would first calculate the molar mass of water (H2O). The molar mass of water is approximately 18.015 g/mol. Then, you divide the given mass (4.50 grams) by the molar mass to get the number of moles. In this case, 4.50 grams of water is approximately 0.25 moles.

Answer 3

For this you need the atomic (molecular) mass of H2O. Take the number of grams and divide it by the Atomic Mass. Multiply by one mole for units to cancel. H2O=18.0 grams

4.50 grams H2O / 18.0 grams = .250 moles H2O

Answer 4

For this you need the atomic (molecular) mass of H2O. Take the number of grams and divide it by the atomic mass. Multiply by one mole for units to cancel. H2O=18.0 grams

4.50 grams H2O / (18.0 grams) =.25 moles H2O

Answer 5

First of all, there are 4 molecules of water since H2O is the formula of water

And when we come specifically, there are eight molecules of hydrogen and four molecules of oxygen. I've done this by multiplying the

Answer 6

There are 6.022 E23 molecules in each mole of a substance. Then 4.5 moles of H2O has 2.71 E24 molecules of water.

Answer 7

Water has a molar mass of 18.0153 grams per mol, so there are .25 moles of water. Using Avogadro's constant, there are then 1.51 E23 molecules of water.

Answer 8

Avogadro's Number is the number of molecules in one mole (6.022 x 10^23)

So take it 4 times as big: 24.088 x 10^23 = 2.4 x 1023 molecules. But how do you imagine how many they are?

Answer 9

Since the coefficient refers to the amount of moles, there are 4 x 6.02x10^23 or 24.08 x 10^23 molecules represented by 4H2O

Answer 10

00000.34256 moles in 4.50g of H20