Question | Answer |
What is the chemical formula for water? | H2O |
Electrolysis is | when you use electricity to break down a molecule into it's elements |
Polar Molecule is | A molecule that has slight positive and negative charges |
What is a Solvent | A liquid capable of dissolving other substances. |
What is Solute | A substance that is dissolved in a solvent |
Define Cohesion | it's when individual molecules are so strongly attracted to each other, that they tend to stay together even when there is tension. |
What is hard water? | water that has certain dissolved ions in it, mainly calcium ions. |
Some metals tend to absorb oxygen but not hydrogen. Suppose such a metal was covering the battery in an electrolysis experiment like in 4.1. Which is more likely erroneous result: h02 or h4o? | H4o |
Why is water a liquid at room temperature when all other chemically similar substances are gases at room temperature? | Hydrogen bonding keeps the molecules close together |
How many atoms are in one molecule of co2? How many atoms are in one molecule of CO? | There are 3 atoms in CO2, and and 2 in CO. |
The principal component of gasoline is octane, whose molecules are composed of eight carbon atoms (c) and eighteen hydrogen atoms (H) What is the chemical formula? | C8H18 |
Why are water molecules polar? | because both the oxygen atoms and the hydrogen atoms are fighting over the electrons they are supposed to be sharing. |
If a substance does not dissolve in water, is it ionic,polar, or nonpolar? | nonpolar |
If a substance dissolves in water, will it dissolve in vegetable oil, a nonpolar substance? | it will not dissolve in vegetable oil |
Is hard water the result in the city's water treatment process? | no, it is a result of calcium containing compounds from the region where it was taken. |