Very Large and Very Small Numbers
Very Large and Very Small Numbers
Very Large and Very Small Numbers
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Essential Information<br />
(i) What information do you need to solve the problem<br />
(ii) How will you use this information to work out a solution <br />
Question 3<br />
How many H 2 O molecules are there in a teaspoon of water<br />
<br />
<br />
<br />
Essential Information<br />
Volume of a teaspoon<br />
Volume of H 2 O molecule<br />
Extra Information<br />
To work out the volume of a single water molecule you will need to<br />
find out the ‘Molar Volume of water’ (this is the volume of 1 mole of<br />
water). 1 mole contains N A water molecules where N A is called<br />
‘Avogadro’s s Constant’ so you will need to find this out as well!<br />
You might not be able to find the Molar Volume of water but you can<br />
work it out if you find the ‘Molar Mass of water’ <strong>and</strong> the density of<br />
water (use the equation density = mass/volume.<br />
Hint: Use a Chemist!
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