answersLogoWhite

0


Best Answer

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.

User Avatar

Wiki User

11y ago
This answer is:
User Avatar
More answers
User Avatar

Mira Netsebrak

Lvl 2
11mo ago

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

This answer is:
User Avatar

User Avatar

Wiki User

14y ago

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

This answer is:
User Avatar

User Avatar

Wiki User

14y ago

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

This answer is:
User Avatar

User Avatar

Wiki User

9y ago

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.

This answer is:
User Avatar

User Avatar

Wiki User

9y ago

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.

This answer is:
User Avatar

User Avatar

Wiki User

13y ago

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?

This answer is:
User Avatar

User Avatar

Wiki User

13y ago

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

This answer is:
User Avatar

User Avatar

Wiki User

11y ago

00000.34256 moles in 4.50g of H20

This answer is:
User Avatar

User Avatar

Jayna Kelise

Lvl 2
3y ago

How many hydrogens are in 4H2O?

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What is the number of moles in 4.50 grams of H2O?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

Find the mass in grams of 1.54 moles of H2O?

1.54 moles H2O (18.016 grams/1 mol H2O ) =27.7 grams


How many moles of H2O is 7.038 grams of H2O?

The answer is 0,44 moles.


How many moles of hydrogen atoms are present in 25 grams of water?

For this you need the atomic (molecular) mass of H2O. Take the number of moles and multiply it by the atomic mass. Divide by one mole for units to cancel. H2O= 18.0 grams2.5 moles H2O × (18.0 grams) = 45.0 grams H2O


How many moles in 60 grams of H2O?

1 mole is equal to 18 grams of H2O, so 60 grams is 3.33 moles.


How many moles are in 40.0g of h20?

Since moles = mass/molar mass then the number of moles is 40.0/(1+1+16) = 2.22mol to 3sf


Can you show me how to calculate the of moles in 0.037g H2O This is the mass of water lost after heating.?

.037g x 1 mole of H2O / 18.02g H2O= .00205 moles H20 this is a simple factor label problem in which you multiply the number of grams by the number of grams per mole. Thus, the GRAMS cancel and you are left with moles. 18.02 is the molecular weight of H2O; 1.01+1.01+16= 18.02 g/mol


How many moles are in 53 grams of H2O?

53 grams ÷ 18.01 grams/mole = 2.94 moles


How many moles are there in 235 grams of H2O?

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 grams235 grams H2O / (18.0 grams) = 13.1 moles H2O


How many moles are present in 500.00 g of H2O?

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 grams500.0 grams H2O / (18.0 grams) = 27.8 moles H2O


How many moles are in 35.1 grams of water?

To teach you how to do this problem: 1. Look at the Periodic Table. O =16 grams/mole, H =1.01 grams/mole 2. Calculate the Molecular Weight of Water. 1*O + 2*H: 16+2.02=18.02g/mole 3. Divide the mass of what you have by the Molecular Weight: 35.1g H2O/(18.02 g H2O/mole H2O) 4. The units g H2O cancel leaving you with mole H2O. 5. 35.1 grams H2O= 1.95 moles H2O


How do you convert grams to molecular mass?

Suppose you have 1g of H2O and you want to convert that to moles. You multiply 1g by the inverse of molar mass to get the moles of H2O: 1g H2O *(1mol H2O/18g H2O)= 0.56 moles of H2O in 1g of H2O. You get 18g = 2(1.008)+1(16.00).


How many GRAMS of hydrogen are present in 2.08 moles of water?

2.08 moles H2O (2 moles H/1 mole H2O)(1.008 grams H/1 mole H) = 4.19 grams of hydrogen ===================