Anything greater that 7 is a base....so 13 would be a very strong base for example a drain cleaner. Hopefully this is what you are looking for.
Here we have to choose the atom which has same number of neutrons as 14N
The atom which has same number of neutrons as 14N among the given atoms is (D) 13C
We know, in an atom the number of electrons (atomic number) is equivalent to the number of protons. For nitrogen (N), the number of electron is 7. Thus the number of protons present in the nucleus is also 7 to make the atom uncharged.
The mass number of the atom is the number of the neutrons + number of the protons. In 14N there are 7 protons and 7 neutrons.
Thus among the given atoms the atom which has 7 neutrons will have the same number of neutrons.
A) Now in 16O the atomic number is 8 and mass number is 16. Thus the number of protons and neutrons are each 8 units.
B) In 15N, the atomic number is 7 but mass number is 15, thus number of protons and neutrons are 7 and 8 respectively.
C) In 14P the atomic number is 15 but mass number is 14, so number of protons and neutrons are 15 and -1 (not exist) respectively.
D) In 13C the atomic number is 6 and mass number is 13. So the number of protons are 6 and number of neutrons are 7.
Thus the correct answer will be D) 13C.
Answer:-
Solution:- The equation for the conversion of gold ions to gold metal is as follows:
From this equation, 1 mol of Gold metal is deposited by 3 mole of electrons.
We know that one mol of electron carries one Faraday that is 96500 Coulombs.
So. 3 moles of electrons would be = 3(96500) = 289500 Coulombs
We could calculate the total Coulombs by using the formula:
q = i*t
where, q is the charge in coulombs, i is the current in ampere and t is time in seconds.
q = 
q = 51408 ampere per second
Since, 1 ampere per second = 1 coulomb
So, 51408 ampere per second is same as 51408 coulombs.
Let's use this value of q and the info from balanced equation and molar mass(196.967 g epr mol) of gold to calculate the mass of it being deposited while the current is passed as:
= 35.0 g Au
So, 35.0 g of gold are deposited on passing 23.8 ampere of current for 36.0 min to a gold solution.
Answer:
Wheel and axles
Explanation:
Clocks run on a complex system of gear trains. This provides the energy to turn the hands of the clock. A high-ratio gear train gears the weight drum way up so that you don't have to rewind the clock very often. This somehow disengages, slips or ratchets the gear train so the clock can be rewound and set.
