A 0.62g sample of sodium hydroxide and sodium carbonate and inert material was dissolved and required 30.00cm^3 of HCl to reach the phenolphthalein end point. Methyl orange point was added and 6.50cm^3 more HCl was required to reach the methyl orange point, if the HCl was 0.24M, calculate the percentage of sodium hydroxide and sodium carbonate in 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.

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml

The biomedical technique in which a part of the brain is destroyed with electric current is known as a. electroconvulsive therapy b. prefrontal lobotomy c. bilateral cingulotomy d. tardive dyskinesia