Aconcentrated solution has: a) more particles per litre than a dilute one b) bless particles per litre than a dilute one what is the answer? a or b?

How have the greenhouse gasses increased from the year 2000 to 2018

Stage in which a typical star has completely stopped fusion

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.