Author Question: The numbers in front of the formulas in a chemical equation are referred to as a) subscripts. b) ... (Read 17 times)

yoooooman · **on:** Jul 28, 2018

The numbers in front of the formulas in a chemical
equation are referred to as
a) subscripts.
b) superscripts.
c) coefficients.
d) common denominators.

Question 2

A 4.0-kg mass has a velocity of 4.0 m/s, east when it explodes into two 2.0-kg masses. After the explosion one of the masses has a velocity of 3.0 m/s at an angle of 60 north of east. What is the magnitude of the velocity of the other mass after the explosion?
a. 7.9 m/s
b. 8.9 m/s
c. 7.0 m/s
d. 6.1 m/s
e. 6.7 m/s