Answer:
Your answer should be B.) C, Si, Ge, Sn! I hope this helps you! :)
Answer:Thompson-plum pudding model of the atom
Rutherford- planetary model of the atom
Bohr- Quantization of energy levels in the atom
Explanation:
Thompson postulated the atom to be a sphere of negative charges into which positive charges were embedded. He discovered electrons. Rutherford discovered the nucleus and protons. Bohr first postulated the idea that electronic energy levels are quantized.
Answer:
The correct answer is option a.
Explanation:
Moles of octane =
Moles of oxygen gas =
According to reaction, 25 moles of oxygen reacts with 2 moles of octane.
Then 0.46875 moles of oxygen will react with:
of octane
Oxygen is present in limited amount. Hence, limiting reagent.
According to reaction , 25 moles of oxygen gives 16 moles of carbon-dioxide.
Then 0.46875 moles of oxygen will give:
of carbon-dioxide
Mass of 0.3 moles of carbon-dioxide:
0.3 g × 44 g/mol = 13.2 g
Theoretical yield = 13.2 g
Experimental yield = x
Percentage yield of carbon dioxide = 93 %
x =12.27 g ≈ 12 g
12 grams of carbon dioxide will be produced in this engine .
Answer:
Br—Br bond is NON-POLAR
Explanation:
When two atoms are the same the electron pair stays in the middle of the bond.