A sample of crushed rock is found to have 4.81 x 10^21 atoms of gold, how many moles of gold are present in this sample? A. 7.99 x 10^-3 moles
B. 1.57 x 10^-1 moles
C. 1.25 x 10^3 moles
D. 2.47 x 10^5 moles

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

Which of the following are correct values for the ideal gas laws constant r