For which of the following elements is the number of neutrons correctly represented, based on the atomic number and mass number given? a. iron: atomic number 26, mass 56, neutrons 30 b. neon: atomic number 10, mass 20, neutrons 9 c. potassium: atomic number 19, mass 39, neutrons 19 d. phosphorus: atomic number 15, mass 31, neutrons 15

Which statement describes how phase changes can be diagrammed as a substance is heated? the phase is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the phase is on the x-axis. the time is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the time is on the x-axis.

What is bromine+calcium iodide--> calcium bromide +iodine balanced

Astudent states that 9.0 g of baking soda will form an unsaturated solution in 100 g of water. what do you need to know to decide whether this statement is correct? a. the temperature of the water and the molar mass of baking soda b. the percent by volume of the solution and the solubility of baking soda c. the temperature of the water and the solubility of baking soda at that temperature