<span>Well, for one, they have the same amount of electrons in the outmost shell: Group 1 has 1, Group 2 has 2 etc...They all share similar chemical properties, for example Group 6 (?) S and Se both are acidic oxides.</span>
I would agree with the second one, not the first. You can't always see the chemical reaction, and it isn't always sudden. But the second claim is true.
Answer 1) The group number of the most nonmetallic group that contains metalloids is Group VI A.
Explanation : Astatine (At) is the elemental metalloid which is found in group VI A which is placed in the bottom of most nonmetallic groups containing oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and the radioactive element polonium (Po).
Answer 2) The group number of the most metallic group that contains metalloids is Group III A.
Explanation : Boron (B) is the metalloid which belongs to group III A which is the most metallic groups containing aluminum (Al), gallium (Ga), indium (In) and thallium (Tl). Amongst the placement in the top of metallic group Boron behaves like a metalloid.
Find the number of mols of CO2
1 mol of CO2 has a mass of
1 C + 2Os = 12 + 2*16 grams = 44 grams
x mol =0.0418 CO2
1/x = 44/0.0418
44x = 0.0418
x = 0.0418 / 44
x = 0.00095 mol
1 mol of CO2 has 6.02 * 10^23 Carbon atoms in it. Note that is the same number of molecules of CO2 present.
0.00095 mols = x
1/0.00095 = 6.02*10^23) / x
x = 6.02*10^23 * 0.00095
x = 5.719 * 10^20 atoms of carbon in 0.0418 grams of CO2
Answer:
Density (ρ) = 5 kilogram/cubic meter
Explanation:
Steps:
ρ =
m
V
=
10 kilogram
2 cubic meter
= 5 kilogram/cubic meter
