calculate the percentage composition in terms of mass of a solution by mixing 100g of 30% solution of phosphorous pentachloride with 40% solution of phosphorous pentachloride?​

Which statement is true about ionic compounds?

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.

What is the molecular weight of copper