How does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed?
OA
the value of q is negative
OB.
the value of g is positive
C. the value of a remains constant
OD. the value of a decreases
OE. the value of q equals zero

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution. calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest