Aresearcher wants to test the solubility (property of being dissolved) of salt in water as the temperature of the water increases. design an experiment to test his hypothesis that as the water temperature increases the solubility of the salt in water also increases. include the following in your experimental design: experimental setup, procedure for data collection methods and criteria for evaluating the hypothesis. materials: salt, water, beakers, heat source, thermometer, balance

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.