In which orbitals would the valence electrons for selenium (Se) be placed?

when reacting with Na with Cl2, we calculated that the theoretical yield should be 13.0 grams. our actual yield was 12.5 grams. what is the percent yield?

What is a key difference between an electrolytic cell and a voltaic cell? The anode is where the oxidation takes place. The cathode is where the reduction takes place. There are two half-reactions. There is an outside energy source.

Which of these does not cause a change in the reaction rate? A. density B. temperature C. concentration D. particle size

The pressure of 2.73 mol of an ideal gas in an enclosed rigid container at 20.3° C is 153kPa. What is the volume of the container in liters? (R 8.31 L-kPa/mol-K)

What happens to a container of gas when the pressure is increased?

Organic compounds ALL contain the element carbon. Which organic compound, used for stored chemical energy, contains carbon, hydrogen, oxygen, and often phosphorous?

In a polar molecule, which atom will have the greatest partial negative charge? A) the smallest atom B) the least electronegative atom C) the largest atom D) the most electronegative atom

Why is portion control important

Which ionic compound is the most likely to dissolve in water? CaSO4 Na2SO4 BaSO4 SrSO4

Calcium (atomic number 20) has electron configuration 1s2,2s2,2p6,3s2,3p6,4s2. The atomic number of scandium is 21. Which orbital does the 21st electron enter? a. 3d b. 4p c. 4d d. 4f