A reaction uses up 20 grams of reactant at a rate of 0.50 grams/s. How much time will it take for all of the reactant to be used up?

0.50 s

20 s

40 s

80 s

Question

A reaction uses up 20 grams of reactant at a rate of 0.50 grams/s. How much time will it take for all of the reactant to be used up?

 
   
0.50 s
 
   
20 s
 
   
40 s
 
   
80 s

rushwr · Answer

What do u think the answer is ?

rushwr · Answer

Looking at the rate's unit. you can simply see that the rate here was calculated by dividing grams by seconds. $$Rate = \frac{ grams(reacted amount ) }{ seconds (time taken \to react) }$$ so the answer would be 40 s