4. An unknown substance in solution is slip- pery to the touch, dissolves easily in
water, and makes litmus paper turn blue.
The substance is most likely
A. an acid.
B. a base.
C. a salt.
D. an indicator.

In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added

The atom fluorine generally will become stable through the formation of an ionic chemical compound by accepting electron(s) from another atom. this process will fill its outer energy level of electrons.

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate