Answer:
33.6 mol of the atom strontium contains approximately
3) 2.02 × 10²⁵ atoms of strontium
Explanation:
The number of atoms in one mole of a substance is given by Avogadro's number number,
, which is presented as follows;
1 mole of a substance contains
= 6.022 × 10²³ elementary particles
33.6 mol of a substance will contain 33.6 × 6.02214 × 10²³ elementary particles of the substance
Therefore;
33.6 mol of the atom strontium contains 33.6 × 6.02214 × 10²³ = 2.023439 × 10²⁵ atoms of strontium
33.6 mol of the atom strontium contains ≈ 2.02 × 10²⁵ atoms of Sr.
Answer:
A. V2=P1V1/P2
Explanation:
Robert Boyle law stated that pressure of a particular quantity of basis inversely varies with respect to the volume provided that the temperature is constant. It is expressed as
PiV1 = P2V2,
Where
V2= final volume
V1= initial volume
P1= initial pressure
P2= final pressure
Making V2 subject of formula we have
V2=P1V1/P2
Answer:
Pure iron is impermeable to air and water, so True.
Explanation:
When corroding, the oxide layer becomes permeable, but water and air cannot pass through pure iron.
I hope this helps! :)