If a sample of pure calcium 9Ca) contains 4.69 x 1022 atoms of iodine, there are 0.0779 moles of calcium in the sample. The correct answer will be A.
No, it is a physical change. Changing states is physical.A chemical change is to change the nature of something by changing it's chemical makeup.
Gravity. The rock is being pushed down and you are counteracting that force with a crowbar pushing it upward.
The Answer would be e: 3.2 g/L
<span>At STP : p = 1 atm and T = 273.15 K
molar mass Cl2 = 70.906 g/mol
d = molar mass x p/RT = 70.906 x 1 atm / 0.08206 x 273.15=3.16 g/L</span>
i think helium hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
