General Chemistry
When we did the balloon experiment on a ruler, we were learning that air has __________
mass
anything that has mass and takes up space
What is matter?
My silver ring has turned black. It went through what change?
What is a Chemical change
What does the law of conservation of mass state?
What is a matter cannot be created or destroyed
A combination of 2 things in uniform composition
What is a solution/homogeneous mixture?
The property that describes the ability of the substance to be dissolved in another substance
what is solubility
The amount of matter in an object.
mass
A plant uses photosynthesis to grow. (It uses the sun and water to create its own food)
chemical change
Consider the chemical equation below:
Magnesium + Oxygen ---> Magnesium Oxide 48 g ? g ------> 80 g
What is the mass of oxygen
What is 32 g
Koolaid, steel, brass, air, and milk are examples of this.
What is a solution/homogeneous mixture?
The periodic table organizes elements by their __________________
atomic number
The smallest particle of matter is....
an atom
It changes a substance to something else, permanently
What is chemical change
If 115 g of a substance reacts with 84 g of another substance, what will be the mass of the products after the reaction?
What is 199 g
pizza, tacos, trail mix and cereal with milk are examples of which mixtures......?
heterogeneous
The lab we did with a battery and a LED light was working with what physical property?
conductivity
This is a type of mixture that has such small particles in it that it doesn't settle. An example would be foam.
What is a colloid?
A phase change is this type of change (a liquid turning into a gas)
What are physical changes
A student mixes 5 g of chocolate powder into 16 grams of milk. At the end of this physical change, what should the total mass at the end?
21 g
This type of mixture is easy to separate back into its original components.
What is heterogeneous?
When we dissolved sugar into water, which physical property were we working on?
solubility
A characteristic of matter that can be observed and measured WITHOUT changing the material.
physical property
Watching the Orbeez change size is what type of change?
physical change
Given a chemical reaction below:
CH4 + 2O2 --> CO2 + 2H2O
16g 64g 44g
How much of water are we making in this reaction?
What is 36 g
salt
Which lab did we do that focused on the physical property of magnetism?
iron and sand...
The amount of space an object takes up is....
volume
My daughter has cut that got infected and is red and yellow. What change did her skin go through since the cut?
What is chemical change.
Why did we use a balloon on the alka seltzer experiment? (think conserving matter)
To capture the gas that was created
When separating sand and water, what is quickest method and what property difference are you using then?
what is filtration and the difference of particle size
What are the two ways you can find volume?
(one is for a regular shaped object, and one is not)
displacement and L x W x H
What is the formula for density AND what is the definition of density?
D=M /V
Density is the amount of mass in a given volume.
The 5 signs of a chemical change are....
color change
odor change
temperature change
formation of a solid
formation of a gas
A solid mass of 25 g is mixed with 60 g of a solution. A chemical reaction takes place and a gas is produced. The final mass of the mixture is 75 g. What is the mass of the gas released? (think what is left...)
What is 10 g
In a mixture, 2 or more substances combine, but they do not combine _____________.
chemicallly