State of Matter Chemistry TEST

The temperature of the water started rising only when:

Othere was steam coming off the water in the beaker.

Othere was only water in the beaker.

theres was ice mixed with the water in the beaker.

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.

How do you know when a chemical reaction has occurred

How many moles of cu are needed to react with 5.8 moles of agno3? cu + 2 agno3 → cu(no3)2 + 2 ag