Answer:
4.15×10⁻²¹ moles of Sn
Explanation:
This question can be solved by a simple rule of three.
We know that 1 mol contains 6.02×10²³ particles.
In this case, our particles are the atoms, so:
6.02×10²³ atoms / 1 mol . 2500 atoms = 4.15×10⁻²¹ moles.
The knowledge of mol can be applied for everything:
A mol of molecules
A mol of atoms
A mol of a compound
Out of all given options, "Ethanol contracts and metal contracts" is the statement which correctly describes the volume change of the ethanol and the metal tank.
Answer: Option C
<u>Explanation:</u>
In any case, contingent upon its thermal development properties, every material will experience an alternate volume change. In this way, the measure of air over the ethanol in the tank is dictated by the distinction between the volume changes experienced by the tank and the ethanol.
When noting to take more care on the issues, it is adequate to discover the volume change for every material, without computing its last volume. The ethanol and tank metal contract when the temperature term of their surfaces decreases.
Answer:
E = hv
Explanation:
Energy = planck constant × frequency
