In a calcium atom in the ground state, the electrons that possess the least amount of energy are located in the

(1) first electron shell

(2) second electron shell

(3) third electron shell

(4) fourth electron shell

Which of these is the largest quantity? O a gigabyte of memory the United States debt, trillions of dollars O a mole of carbon atoms a dozen eggs

On a warm summer day in Helsinki, the temperature is 20°C and the relative humidity is 40%. What is the absolute humidity? Number kg / kg Dry Air What is the humid volume of the air?

What do Van der Waals forces do?

Give the number of significant figures indicated 78

Is putting popsicle molds in the fridge a physical or a chemical change? Explain why?

Audrey is driving 50 miles in 2 hours what is her average speed?

Water has a specific heat of 4184 J / (kgK) how much energy is needed to increase the temperature os a kilogram of water 5C?

A student noticed while doing the neutralization experiment that the calorimeter kept getting warmer. how would this error affect the final calculation for the δhneut of each reaction? would it be overestimated, underestimated or remain unaffected?

A solution contains 45 grams of nitrogen gas and 40 grams of argon. What is the mole fraction of argon in this solution?

How is an animal cell related to tissue and organs