Answer:
0.067 mole Ag°
Explanation:
Given 7.22 g Ag° = 7.22g Ag/ 107.8g/mol = 0.0670 mole Ag° (3 sig. figs.)
Low temperature in water and an increase in salinity.
The smaller pieces are less dense than the larger piece that remains.
<h3>What is density?</h3>
- The density of an object is defined as the ratio of mass to volume of an object.
The density of a substance is calculated as follows;
where;
- ρ is density
- m is mass
- V is volume
Since the pore volume of the rocks are the same, their densities is compared as follows;
- Let the mass of the small pieces = m1
- Let the mass of the larger pieces = 2m1
Thus, density depends on mass and the smaller pieces are less dense than the larger piece that remains.
Learn more about density here: brainly.com/question/6838128
Answer:
- 1.22KJ
Explanation:
First we put down the equation of the reaction;
NH4Cl(s)<-------->NH3(g) + HCl(g)
The equilibrium constant K is obtained from;
K= P(NH3) × P(HCl)
Where;
P(NH3)= pressure of ammonia
P(HCl)= pressure of hydrogen chloride gas
Pure solids and liquids are not included in the equilibrium constant expression. This is because they do not affect the reactant amount at equilibrium in the reaction, so they are disregarded and kept at 1. Remember that the activity, a, of any solid or liquid in a reaction is equal to 1. Hence [NH4Cl]= 1
K= 1.03 × 1.18 = 1.22
∆G° = -RTlnK
R= 8.314 JK-1mol-1
T= 465°C +273= 738K
K= 1.22
lnK= ln(1.22)= 0.19885
∆G= -(8.314 ×738 ×0.19885)
∆G= -1220.1 J
∆G= -1.22×10^3 J
∆G= - 1.22KJ