Show:
Pure Substances
Math
Lab Wheel
Elements near the Earth
100
This is what we call a substance that has 2 or more elements chemically combined.
What is a compound?
100
This much oxygen will combine with 100 ml of hydrogen to make water.
What is 50 ml?
100
This is proof copper reacted with something when we heated it.
What is the fact that there was a gain in mass or there was a color change?
100
This is the percentage the first five most abundant elements near Earth comprise.
What is 92%?
200
Out of the following list, which one doesn't belong: zinc chloride baking soda chlorine water
What is chlorine?
200
This is the volume ratio of zinc chloride, ZnCl2.
What is 2:1 (or 1:2)?
200
After copper was heated, the black substance remained was this.
What is a mixture of copper and copper oxide?
200
This is the most abundant element near the surface of the Earth.
What is oxygen?
300
A shiny rock found on a field trip was brought back to the classroom. When heated, the rock lost mass. Is this a mixture or a pure substance?
What is a mixture?
300
When 18 g of water decomposes, what is the volume of hydrogen that is produced?
What is 24,000 ml?
300
This was proof that the black substance from lab 6.6 was in fact a mixture.
What is the fact that the HCl dissolved the copper oxide but left the copper behind?
300
This is the second most abundant element found near the Earth's surface.
What is silicon?
400
This evidence we gathered proves that water is a pure substance.
What is the fact that it needed electricity to be broken down and that it decomposed in a fixed ratio (2:1).
400
This is the mass ratio we found in the zinc chloride lab.
What is 0.48?
400
This is the reason why copper + oxygen is an incomplete reaction.
What is the fact that neither reactant are completely used up?
400
This is the reason oxygen is 65.5% when it only comprises 20% of the air that surrounds us is this.
What is the fact that oxygen is found in the air, oceans, and the Earth's crust?
500
Paint color is a combination of ingredients combined in a fixed ratio so that the color is the same every time. Why isn't paint a pure substance?
What is the fact that the different ingredients are not chemically combined.
500
This is the mass of water produced when 100 ml of oxygen and 200 ml of hydrogen combine chemically.
What is 0.15 g?
500
This is what happened when we added zinc the the HCl and copper oxide solution.
What is copper precipitated out of the solution?
500
What is the mass of uranium oxide when 5.00g of oxygen combines with 37.2g of uranium?
What is not enough information since we do not know the mass ratio?