Answer:
Gas to liquid
Explanation:
As the atoms temperature decreases, the kinetic energy of the atom decreases. Besides if it is turning to solid the atoms will be fixed position,they wont pass each other. So it here is forming to become a liquid
Planets, black wholes gravity
Answer:
Acids have a high concentration of [H⁺] ions
Explanation:
In order to know about the acids, a solution is acidic when pH < 7
As pH is lower than 7, the pOH > 7
When pH = 7, solution is neutral
When pH is greater than 7, solution is basic
pH = - log [H⁺]
pOH = - log [OH⁻]
Imagine a solution of pure HCl 0.2 M
HCl → H⁺ + OH⁻
[H⁺] = 0.2 M → pH = - log 0.2 → 0.69
pH + pOH = 14
pOH = 14 - 0.69 = 13.31
10^-pOH = [OH⁻] → 10⁻¹³°³¹ = 4.89ₓ10⁻¹⁴
In conclussion [H⁺] > [OH⁻]
Answer:
<em><u>Mass of Ni = 4.14 grams</u></em>
Explanation:
Molar mass : It is the amount of substance present in 1 mole of the molecules.
Moles : It is the quantity that contains as many atoms as present in 12 gram of C-12. This is equal to Avogadro Number .
Molar mass of Ni = 58.69 g/mole
Moles can be calculated by two formula:
........(1)
And ,
.........(2)
Comparing equation 1 and 2
M = 58.69 g/mole
Put these value in the formula and solve for m
m = 4.14 gram
<em><u>Mass of Ni = 4.14 grams</u></em>
<em><u>Second Approach :</u></em>
Find the moles first using :
Then put value of n in the formula(1) and solve for m
........(1)
Answer:
Fe will displace On but no the reaction is not vigorous.
