The answer is -3, if you are asking for that
Chemical energy if thats an answer choice
The statement that correctly explains the molecular structure of water is A. One oxygen (O) and two hydrogen atoms (H2) are joined by a covalent bond.
It cannot be ionic, since ionic bonds tend to be sold at room temperature.
The correct sentence is this:
THE VAPOUR PRESSURE OF ACETONE IS SMALLER THAT THAT OF WATER AT THE SAME TEMPERATURE.
Acetone will evaporate more quickly that water when exposed, this is because, its vapour pressure is smaller than that of water. The vapour pressure of water is greater, thus, at the same temperature and pressure, it will take less pressure to vapourize acetone.
Answer:
The answer is 4.28 moles
Explanation:
This is super easy okay, you won't forget this!
Basically mole ratios, we're just looking at the coefficients in front of the compounds, multiplying them, and dividing them as we see fit.
In this example, you can see how you need 2 moles of lithium bromide (LiBr) for the reaction, and 2 moles of lithium chloride (LiCl) will be produced.
Basically, the <u>molar ratio</u> is when you divide numbers and see how much of this do I have for that (if that makes sense).
So if you were to divide the 2 moles of LiBr / 2 moles of LiCl = 1. So we know that the mole ratio for LiBr to LiCl is 1:1 or 2:2, either or, it's the same thing.
SO THE BIG IDEA, if we have 4.28 moles of lithium bromide reacting, we should also have 4.28 moles of lithium chloride produced, BECAUSE the <u>mole ratio</u> is 1:1.
I hope this makes sense please tell me if it doesn't, I will try my best to explain a little more.