Calculate ΔE for a process in which a system performs 4.34 kJ of work and absorbs 12.43 kJ of heat. Express your answer to two places past the decimal in units of kJ (don't include units in your answer). if someone could help with explanation

air quality

poor drinking water

and heavy polution

can lead to poor health

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

explanation: no but i do not usually comment