Express the following number in scientific notation: 0.675.
a. 6.75 × 107
b. 6.75 × 108
c. 6.75 × 10-7
d. 6.75 × 10-8

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call

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