#1: A chemical reaction gives off 2,100 kJ of heat energy. About how many calories is this? (1 calorie = 4.18 Joules)

A. 5.0 x 10^6 calories

B. 5.0 x 10^5 calories

C. 5.0 x 10^4 calories

D. 5.0 x 10^3 calories
***My answer: B. 5.0 x 10^5 calories

Question

#1:  A chemical reaction gives off 2,100 kJ of heat energy. About how many calories is this? (1 calorie = 4.18 Joules)

A.       5.0 x 10^6 calories 

 B.      5.0 x 10^5 calories

  C.     5.0 x 10^4 calories 

  D.     5.0 x 10^3 calories
***My answer: B.      5.0 x 10^5 calories

anonymous · Answer

#2: On a graph of mass vs. volume, which of the following indicates the density of the substance?

A.       x-axis

 B.      slope

  C.   y-axis

D.       origin
**i think it is either slope or origin.. idk
here is the graph :)

anonymous · Answer

#3: Which of the following goes on the x-axis of a graph?

A.       dependent variable values

 B.      trend line

 C.      independent variable values

  D.     graph title
**My answer: C independent variable values..

anonymous · Answer

hey! what do you think???

aaronq · Answer

# 1 is correct, for #2 it's the slope, the origin would only tell you the starting point haha#3 is right too

anonymous · Answer

awesome!! thanks :)