The mass number of Fe2 + is 56. How many neutrons are there in a single Fe2 + atom? 28 30 56 58

Which statement best describes how to read a reaction pathway graph for an endothermic reaction? 1) Reactants absorb a minimum amount of energy and then release a larger amount of energy as products form.

Water (dihydrogen monoxide) will have which molecular configuration? A) bent B) linear C) tetrahedral D) triangular

Kendall wants to determine if there is a trend in air temperature changes during April. Which procedure should she chose? A) measure the temperature every hour for 1 day B) measure the temperature at noon everyday P. S This is Science

A train travels 99 km in two hours and then 72 km in two hours what is it's average speed

Which best explains why metal cooking utensils often have plastic coating on the handles

Why doesn't gravity pull water all the way to the center of the Earth?

What is centrifugation? Which substance is separated by this method?

All of the elements in a family or group have similar chemical properties. which of the following statements best explains why this is true? a. the elements in a group have the same number of protons in their nuclei. b.

A 124-mL bubble of hot gas initially at 212 °C and 1.80atm is emitted from an active volcano. What is the final temperature, in degrees Celcius, of the gas in the bubble outside the volcano when the final volume of the bubble is 138 mL and the

Describe the difference between a qualitative description and a quantitative description, and include an example of each.