Actually it pretty much still is saturated with salt at the boiling point, which is just a tad over 100C. That's because the solubility curve for NaCl isn't much of curve. It's more of a nearly horizontal line.
Nonetheless, the solubility curve for NaCl does drift upward slightly as T increases, and so by the time the boiling point is reached, it won't be saturated.
C, because a half-life is the amount of time it takes for half the atoms to decay.
<span>C. New substances are always produced in chemical changes, which is not the case with physical changes. For example, when you cut wood into smaller pieces you still have wood in the end. But, with a chemical change you change the substance's whole composition. For example when you add two hydrogen's to one oxygen you have water and it can't break down from that. </span><span />
Mass %abundance # of atoms (pick 1000 sample)
68.9257 60.4% 604
70.9249 39.6% 396
*39.6* ( i got this by subtracting 100 as most percentage is out of 100)
*# of atoms* ( i just moved it one decimal place, then i am going to make the sample out of 1000, to get the decimal place)
Formula= total mass/ total #atoms
x= (68.9257u* 604) + (70. 9249*396)/ 1000
x- 69717. 3832/ 1000
x= 69.717amu or 69.72 amu
if you look on the periodic table the closet element with that mass is gallium ( amu is 69.72)
