Please answer this question for m plase! Which of the following is an example of chemical energy being used?
A. Battery in a flashlight
B. Ice melting
C. Riding a bicycle
D. Mercury rising in a thermometer

WARNING: Sorry I'm only in 5th grade so if you see my level as collage I had to put that because it would not let me put anything else

Which of the following pressures is equal to 760 mm hg? 2.0 atm 101.3 pa 101,300 kpa 101,300 pa

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.