For 50 points!! im having a bit of trouble haha

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

Air can be considered a mixture. which statement does not explain why?

Astudent completes a titration by adding 12.0 milliliters of naoh(aq) of unknown concentration to 16.0 milliliters of 0.15 m hcl(aq). what is the molar concentration of the naoh(aq)? 1)5.0 m 2)0.20 m 3)0.11 m 4)1.1 m