It can be done by you only
- First observe the figure or model .
- Then note the observations about its molecular structures .
- Then write it uses and why it is commercial most usable.
Answer:
It s a pure substance.
Explanation:
Can only be separated into its different elements by chemical means because it is connected by a chemical bond.
Answer:D. 2.61 x 10^22
Explanation:
Given that mass of Lead(Pb) = 8.97g
Molar mass of lead =207.2g/mol
No of moles = Mass / molar mass
=8.97g/207.2g/mol
= 0.04329moles
Converting to atoms using Avogadro's number
we know that
1 mole = 6.022 x 1023 atom
Therefore 0.04329 moles of Pb = 0.04329moles x 6.022 x 10^23 atoms
=2.6069 x 10^22
=2.61 x10^22atoms
Answer:
if it has equal positive and negative then neutral. but if there are more electrons than protons then it becomes negative.
Explanation:
hope this helps!
