A or c probably I think a tho
A.) All cells come from pre-existing cells. ~ rats don’t just appear in your house
Answer:
18.45 g of C
Explanation:
This is a problem of rules of three:
1 mol of C₃H₈ contains 3 moles of C and 8 moles of H
If 8 moles of H are contained in 1 mol of propane
4.10 moles of H are contained in (4.1 . 1) /8 = 0.5125 moles
Now, If 1 mol of propane contains 3 moles of C
0.5125 moles of propane may contain (0.5125 . 3) / 1 = 1.5375 moles of C
Let's convert the moles to mass:
1.5375 mol . 12 g /mol = 18.45 g
Answer:
The element is Aluminium. (assuming that the given quantum number set is for the valence electron of the unknown element)
Explanation:
The given quantum numbers are:
n=3 (Principal Quantum Number)
l=1 (Azimuthal Quantum Number)
m=0 (Magnetic Quantum Number)
s= -1/2 (Spin Quantum Number)
The given set of quantum numbers refer to the 3p orbital.
Assuming that this the valence electron of the element, the unkown element is Aluminium.