Pure chemistry refers to pure research - just trying to figure out the properties of existing matter.
<span>Applied chemistry means you are using scientific knowledge of chemistry in order to solve a human problem. For example, chemical medicines are an example of applied chemistry.</span>
Answer:
6.32g
Explanation:
The mass of 1 mol of K is 40g, and the reaction needs 2 moles of K to produce 2 moles of KCl, so it needs 80g of K to produces 151g of KCl.
So you make a rule of three:
x = 3.35•151/80
x = 6.32g
The acceleration is defined as the ratio between the change in speed and the change in time (i.e. the time elapsed to perform the speed change).
In this case, the reference to the "starting block" hints that the initial speed is 0, and the final speed is 8 m/s. This means that the change in speed is 8-0=8 m/s.
We are given that this change in speed takes place in 4 seconds.
So, the acceleration is the ratio between the change in speed and the time elapsed: 8/4=2m/s^2
Option B is the correct answer
+2
Barium has a positive charge of 2