Answer:I have no idea either looks like I should study this
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
-The balanced chemical reaction of oxygen and water is written as:

-You notice that 2 moles of hydrogen gas reacts with one mole of oxygen gas to form 2 moles of water
-Hence, the correct choice is B
Jake wants to post a 600 gram parcel and an 800 gram parcel.
He posts them Second Class.
He pays with a £10 note.
How much change should he get?
The number of friends change the total number of canvases needed, so the number of friends is the independent variable, so the answer is B.