Which chemical equation is balanced? a. h2 + o2 --> h2o b. h2 + o2 --> 2h2o c. 2h2 + o2 --> 2h2o d. 2h2 + 2o2 --> 2h2o

What are transitions between a liquid and gas called? identify which way they are transitioning

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

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.