First of all, find how many sentences are in 17 pages. If in one page there are 120 sentences, in 17...
17*120 = 2040 sentences.
Now, she can read 14 sentences in one minute, how many minutes to read 2040 sentences?
2040 : 14 = 145,71 minutes (about 146 mins).
So, in an hour there are 60 minutes
146 : 60 = 2,42 hours (about 2,5)
But you can also convert 145,71 mins = 2 hours and 25 mins.
Answer:
A. Bubbles formed
Explanation:
When a student added a piece of limestone to a solution of hydrochloric acid, bubbles are formed.
The bubbles are as a result of the CO2 gas that is formed.
Below is the reaction:
CaCO3+2HCl → CO2+H2O + Ca++ + 2Cl-
From the left hand side, we can see that the reaction is with limestone and hydrochloric acid. Their reaction forms carbon dioxide gas (CO2), water (H2O), dissolved calcium (Ca++) and dissolved chlorine (Cl-) on the right hand side.
With due observation, bubbles will be seen evolving from the reaction. These bubbles formed is the carbon dioxide gas which reveals that a reaction is taking place.
Answer:
Give awareness program to the victim
