There are several formulas for distance. The one you choose to use is the one that expressed distance in terms of the information that you already have.
For example, if you already know the speed and the time you've been traveling, then the formula for the distance you've covered is
D = (speed) times (time) .
Answer:
A
Explanation:
Since the new moon is behind the earth, It is sun, earth, moon
Answer:
single replacement reaction.
Answer:
-37.63KJ
Explanation:
First, we write an equation of reaction:
H + Br ——-> HBr
Now we are told that 155g of HBr is formed. We can calculate the number of moles of HBr formed as follows:
We simply divide the mass of the HBr formed by the molar mass of HBr. The molar mass of HBr is 81g/mol
The number of moles of HBr formed is thus 81/155 = 0.52 moles
The amount of heat released is thus 0.52 * (-72) = -37.63KJ
