Answer:
1. In electron dot structure, the dot represent one electrons.
2. Ionic compounds are highly soluble in water.
3. The bond formed by the mutual sharing of two electrons is called covalent bond.
4. there are 3 bonds in nitrogen molecule.
5. the ionic bonds are non-directional.
6. NaCl is taken in molten state
7. formula of common salt is NaCl.
8. Oxygen gas is a diamotic molecule.
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Answer:
E
Explanation:
100 minutes is 5 half lives ( 100 min/20 min/half life)
= (1/2 )^5
1 x 10^20 * (1/2)^5 = 3.125 x10^18 molecules
10. the thing in the slide wasnt centered so the microscope magnefied on nothing 11. mive it tight 12. idk what a um is
Magnetism is inversely proportional to distance
this means that if distance increases magnetic attraction force decreases
Answer is: volume of oxygen is 4.63 liters.
Balanced chemical reaction: 2C + O₂ → 2CO.
m(C) = 4.50 g.
n(C) = m(C) ÷ M(C).
n(C) = 4.50 g ÷ 12 g/mol.
n(C) = 0.375 mol.
From chemical reaction: n(C) : n(O₂) = 2 : 1.
n(O₂) = 0.1875 mol.
T = 48°C = 321.15 K.
p = 810 mmHg ÷ 760 mmHg/atm= 1.066 atm.
<span>R = 0.08206
L·atm/mol·K.
Ideal gas law: p·V = n·R·T.</span>
V(O₂) =
n·R·T / p.<span>
V(O₂) =
0.1875 mol · 0.08206 L·atm/mol·K · 321.15 K / 1.066 atm.</span><span>
V(O₂<span>) =
4.63 L.</span></span>
