CHEMISTRY MIDDLE SCHOOL

Which of the following summarizes photosynthesis?glucose + carbon dioxide → oxygen + water
carbon dioxide + water → glucose + oxygen + water
oxygen + water → glucose + carbon dioxide + water
carbon dioxide + oxygen → glucose + oxygen + water

Answers

Answer 1
Answer: carbon dioxide + water → glucose + oxygen + water

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Is the Coriolis effect caused by the jet stream.

Answers

YES!!!!!!!!!!!!!!!!!!!!!

Which matter exists in the gaseous state at room temperature? A. brick
B. helium
C. school glue
D. washing powder

Answers

helium i would think so
The answer is B. Helium. If you look at the periodic table, Helium is a noble gas, and all noble gases are in the gas phase at room temperature.
Hope this helped ^-^

Stirring a liquid while you are mixing in another ingredient speeds up the rate of dissolving. Question 13 options: True False

Answers

Answer:

true

Explanation:

This is because it helps distribute the particles that are being dissolved. 
The answer would be true

What happens to sound waves then the source of a sound is moving toward you?

Answers

If you are facing the opposite direction of the way the wave is moving, then it will be higher. But, if you are moving the same direction as the wave, it will be lower, because the frequency should go down. Hope this helps! :)

How to balance chemical equations

Answers

To balance a chemical equation, you want the same amount of elements to equal the same on both sides.

Step1. Write equation out
[CH4 + Cl2 ---> CCl4 + HCl] 
C:1; H:4; Cl:2      C:1; H:1; CL:5   /// Cl = 5 since 4Cl +  1Cl

The Carbon element is balanced, but Hydrogen isn't.
 So to balance it we will add a coefficient behind HCl, so now 

[CH4 + Cl2 ------> CCl4 + 4HCL]
C:1; H:4; Cl:2      C:1; H:4; CL:8 ///// Carbon and hydrogen are balanced, but now Chlorine is not. Now we balance that element by addind a coefficiant behind CL2////

[CH4 + 4Cl2 -----> CCl4 + 4HCl]
C:1; H:4; Cl:8      C:1; H:4; CL:8  ///// So now that we added a 4*Cl2, it equals to Cl:8. So now what most people want to see is if every element is at its lowest balance, so we see if we can any coefficient lower. Just like simplifying if possible. 

What country was the first crystal discovered?

Answers

has never been proved since crystals have been around for longer than humanity, highest possibility that the first crystals found by us was in a cave in africa, around today's egypt. they were actually looking for gold but they stumbled upon shiny clear rocks too :)
Africa in Egypt was the first place where discovers found on crystals
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