When solutions containing silver ions and chloride ions are mixed, silver chloride precipitates: ag+(aq)+cl−(aq)→agcl(s)δh=−65.5kj. calculate δh for formation of 0.490mol of agcl by this reaction.

The ΔH for the formation of 0.490 mol of AgCl is - 32.095 kJ.

Explanation:

Ag⁺(aq)+Cl⁻(aq)→ AgCl(s) ΔH=−65.5kJ

We need to consider that the value of ΔH given is for each mol of AgCl formed.

1 mol AgCl - 65.5 kJ

0.490 mol AgCl      x

x = - 32.095 kJ

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

a:

by the combination of an unlimited number of elements