Please help I an giving 20 points for the correct answer​

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

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.

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