Bacl2(aq) + na2co3(aq) baco3(s) + nacl(aq
which coefficient should be placed in front of nacl to balance this equation?
1
2
3
4

Iwill give extra points to who gets this right

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o