She will need 6/8 because 3/4 the cup is divided into 8 so we need the denominator to be 8. we multiply 4 x 2 and what every we do to the top happens to the bottom so we also multiply 3 x 2. then we see that sara needs 6/8 cups of dish soap to make her bubbles
You can simply find out the percentage of the calories from the sugar with this formula :
165/250 x 100%
You will find out that the percentage would be 66 %
hope this helps
<span>2 + 15a - 2
= 15a (because 2 - 2 = 0)
hope it helps</span>
Given that I no not see any explanation in the previos answer, I think you can benefit of this.
Exothermic refers only to the fact that the reaction releases energy in the form of heat when occurs. So, the enthalpy is higher at start and lower and the end.
Seen in this way, you can deduct that the change in enthalpy is negative, which is what the third option says.
