The Mole — Definition & Avogadro's Number
Read this topicExplanations 3
- Since atoms are so small, and there are so many atoms in any sample of matter, scientists have established a unit of measure called the mole to count atoms. A mole is equal to t…
By Catherine Yeo, Gabi Slizewska, Eric Sears
- (Video) The Mole by Bozeman Science In this video, Mr. Andersen describes the mole. You'll learn that a mole is just a number. But, it's a massive number! What's its purpose? To…
By Eric Sears
- Right now, I'm drinking a cup of coffee. Have you ever wondered how many water molecules are in your morning mug of coffee? Maybe every morning before leaving home, you fill a w…
By Eric Sears
Problems 11
- How many chlorine atoms are there in 650g of iodine monochloride(IClIClICl, III 127, ClClCl 35.5)?
- How many moles of helium atoms is equivalent to 6.022×10236.022 \times 10^{23}6.022×1023 helium atoms?
- How many moles of hydrogen atoms are there in 6.022×10236.022 \times 10^{23}6.022×1023 hydrogen molecules?
- How many moles of nitrogen atoms are there in 1.8066×10231.8066 \times 10^{23}1.8066×1023 dinitrogen pentoxide molecules?
- How many moles of oxygen atoms are there in 1.8066×10231.8066 \times 10^{23}1.8066×1023 dinitrogen pentoxide molecules?
- How many water molecules are there in 10 moles of water molecules?
- How many hydrogen atoms are there in 10 moles of water molecules?
- How many carbon atoms are there in 5 moles of glucose molecules (C6H12O6C_6H_{12}O_6C6H12O6)?
- How many atoms are there in 100g of calcium carbonate (CaCO3CaCO_3CaCO3, Ca40Ca 40Ca40, C12C 12C12, O16O 16O16)?
- How many sulfate groups (SO4SO_4SO4) are there in 196g of sulfuric acid (H2SO4H_2SO_4H2SO4)?
- What is the pH of distilled water at 50 degree celsius?