When one or more reactants change into one or more new substances
Answer:
The number of protons and electrons are equal.
Explanation:
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.
Answer:
1.36x10^-19 J
Explanation:
First, we need to write the bohr's equation for the energy levels:
E(n) = -1/n² * 13.6 eV
Now, the question is asking this energy in Joules, so at the end we will use the conversion of eV to Joules.
As the energy level is 4, we just replace the value of n = 4 in the equation and solve for the energy in eV first:
E(4) = -1/4² * 13.6
E(4) = -0.85 eV
Now, the conversion for eV to Joules is the following:
1 eV = 1.6022x10^-19 J
Therefore, we just need to multiply the obtained value of Energy in eV with this factor, and we have the energy in Joules as required:
E = -0.85 * 1.6022x10^-19
E = 1.36x10^-19 J
This is the energy in Joules for an electron in the level 4.
Answer:
The empirical formula of glucose is CH2O
Explanation:
The formula for glucose is C6H12O6
To calculate the empirical formula of glucose, we need to know the number of mole of each element present in the compound.
Since the moles have been given in the formula of glucose C6H12O6
There are 6 moles of carbon, 12 moles of hydrogen and 6 moles of oxygen
Since we've known the number of moles already,so we pick the mole with the smallest number and divide through with it
C - 6/6 = 1
H - 12/6 = 2
O - 6/6 = 1
Therefore, the empirical formula of glucose C6H12O6 is CH2O