If an impure sample of soda ash is known to contain 40.00% of na2co3, calculate the sample size in mg which will react with exactly 40.00 ml of 0.1100 m hcl. what is the % purity of a soda ash sample if it took 42.15ml of 0.1100 m hcl to titrate 0.5017 g of the sample?

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.

Iron (3) oxide will decompose in the presence of hydrogen gas and heater to produced iron and digydrogen monoxide white a balanced chemical equation

In which region is the substance in both the solid phase and the liquid phase? 1 2. 3 4 mark this and return save and exit next