Answer:
1.67×10^25 molecules
Explanation:
No of molecules = no of moles × Avogadros number
No of moles= mass in gram / molar mass
No of moles of water in given sample = 500.3/18
= 27.79 moles
No of molecules = 27.79× 6.02×10^ 23
= 167.32×10^23 or 1.67×10^25
Answer:
If two forces act on an object in the same direction, the net force is equal to the sum of the two forces.
Explanation:
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Answer:
Explanation:
Hrxn = -245.6-296.8+396+50.0 = -96.4 (kJ/mol)
Since Grxn = Hrxn - T*Srxn, where T = 298.15K, we have:
Srxn = (Hrxn - Grxn)/T = (-96.4+75.2)× 1000÷298.15 = -71.1 (j/K mol)
Since: Srxn = Sf (SO2) + Sf (SOCl2)- Sf (SO3) - Sf (SCl2),
or: -71.1 = 248.1 + Sf (SOCl2) - 256.7-184,
Sf (SOCl2) = 256.7+184-71.1-248.1 = 121.5 (J/mol*k)
In order to find T such that Grxn = Hrxn - T*Srxn >= 0. since Hrxn is negative and Srxn is positive, Grxn will always be less than zero. Therefore there won't be a temperature point at which the reaction is going to be non-spontaenous
Answer:
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Explanation:
The concentration of hydroxide ion (-OH) in 1.37 x10^-5 m solution of Ba(OH)2 is calculated as follows
write the equation for dissociation of Ba(OH)2
Ba(OH)2 = Ba^2+(aq) + 2OH^-(aq)
by use of mole ratio between Ba(OH)2 to OH^- which is 1:2 the concentration of OH^- = 2x ( 1.37 x10^-5) = 2.74 x10^-5 M
Answer:
If hydrochloric acid is a polar covalent compound, explain why in aqueous solution it conducts current similarly to an ionic compound.
This occurs because the current is transmitted by the charges of its atoms.
Explanation:
Hydrochloric acid is a compound that is made up of atoms with partial charges, which means that it is a polar molecule. H atoms have a positive partial charge, while Cl atoms have a negative charge, making the molecule as a whole have a neutral charge.
Being a dipole compound, water can dissolve molecules of this type, separate anions and cations. When atoms are separated from these molecules they release ions. In the case of HCl, being an acid, H+ and Cl- ions are released. This separation of charges causes electric current to be conducted.
