You're right, the answer is 64
Well they can be used to make electromagnets that can power a lot of things like door bells and if you have a large not like the size of a fist larger enough to power a house or a decent sized building.
So we know that there are two types of electric currents AC and DC. (AC-DC). The flowing electrons produce something called a magnetic field and the spinning magnets cause Electric current to flow between copper wire.
Example time!
Take a battery, copper wire, and a magnet. Battery connection thing. So place the battery at the bottom put the magnet on top. With the copper wire put it into loops and when place above the battery and magnet. Give it a slight push and it should spin because of the reaction
Answer:-
0.229 L
Explanation:-
Molar mass of AgBr = 107.87 x 1 + 79.9 x 1
=187.77 grams mol-1
Mass of AgBr = 150 grams
Number of moles of AgBr = 150 grams / 187.77 gram mol-1
= 0.8 mol
The balanced chemical equation is
NaBr (aq) + AgNO3 (aq)--> AgBr(s) + NaNO3(aq)
From the equation we can see that
1 mol of AgBr is produced from 1 mol of AgNO3.
∴ 0.8 mol of AgBr is produced from 1 x 0.8 / 1 = 0.8 mol of AgNO3.
Strength of AgNO3 = 3.5 M
Volume of AgNO3 required = Number of moles / strength
= 0.8 moles / 3.5
=0.229 L
Answer:
There are 20 atoms in hydrogen.
Explanation:
Multiply Coefficient with Hydrogens subscript. In this case the coefficient is a 4 so you multiply that with Hydrogens subscript which is 5. So it would be (4)(5)=20