Answer : The molality of sodium chloride is, 1.79 m
Explanation :
To calculate the molality of solution, we use the equation:
Where,
= Given mass of solute (sodium chloride) = 49 g
= Molar mass of solute (sodium chloride) = 58.5 g/mol
= Mass of solvent (water) = 469 g
Now put all the given values in above equation, we get:
Hence, the molality of sodium chloride is, 1.79 m
Answer:
H₃PO₄(aq) ⇄ H₂PO₄⁻(aq) + H⁺(aq)
Explanation:
The phosphoric acid fuel cell (PAFC) employs phosphoric acid (H₃PO₄), a weak acid that dissociates in 3 steps, each with its acid dissociation constant.
H₃PO₄(aq) ⇄ H₂PO₄⁻(aq) + H⁺(aq) Ka1
H₂PO₄⁻(aq) ⇄ HPO₄²⁻(aq) + H⁺(aq) Ka2
HPO₄²⁻(aq) ⇄ PO₄³⁻(aq) + H⁺(aq) Ka3
Air is a mixture
hope this helps :)
Answer:
they lose their water
Explanation:
When exposed to air washing soda crystals lose their water of crystallisation and become amorphous. ∴ The phenomenon is called efflorescence.
Im pretty sure you do the number times the percentage converted to a decimal and then add the sums so (46*0.706)+(48*0.129)+(50*0.165)
32.476+6.192+8.25
=46.918 amu
*i dont trust my calc so pleasee check if the answer is right and also remember to convert a percent to decimal move the decimal back 2 places so like for 12.9% the decimal is gonna be 0.129
hope this helpss ask if you have questions