Answer A)
1. Ne will have 10 protons and the charge of protons is positive.
2. Ne will have 10 neutrons and there is no charge on the neutrons.
3. Ne has 10 electrons and the electrons have a negative charge.
4. Atomic number of Ne is 10.
5. Atomic mass of Ne is 20.1797 u.
6. Name of the atom is Neon.
Answer B)
1. Hydrogen has no neutrons.
2. Atomic mass of carbon is 12 u.
3. Calcium has 20 protons.
4. Fluorine has 10 neutrons.
5. Potassium has 20 neutrons.
6. Oxygen has 8 protons.
Protons identifies an atom.
South ????????????????????????
the answer is twenty eight
Answer : The excess reactant in the combustion of methane in opem atmosphere is molecule.
Solution : Given,
Mass of methane = 23 g
Molar mass of methane = 16.04 g/mole
The Net balanced chemical reaction for combustion of methane is,
First we have to calculate the moles of methane.
= = 1.434 moles
From the above chemical reaction, we conclude that
1 mole of methane react with the 2 moles of oxygen
and 1.434 moles of methane react to give moles of oxygen
The Moles of oxygen = 2.868 moles
Now we conclude that the moles of oxygen are more than the moles of methane.
Therefore, the excess reactant in the combustion of methane in open atmosphere is molecule.
By weight the hydroxides are 45.9% of the weight