Which of the following is a shape that has two foci? A. A ray
OB. A sphere
O C. A circle
D. An ellipse

What were the success and failures that came to boyle’s excitements?

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

0.09 moles of sodium sulfate in 12 ml of solution