Answer:
Explanation:
0.3(125)+0.7(126)=37.5+88.2=125.7
2. The most prevalent isotope is 32, since the average is very close to this value.
Each isotope contains an identical number of protons and electrons, but they vary in neutron count, making them isotopes.
A mixture is created by dissolving 1.43 mol of potassium chloride (KCl) in 889 g of water. The concentration of KCl works out to be 1.61 molal.
The amount of KCl is 1.43 mol
Water weighs 889 g
The molality can be calculated using the formula:
molality = moles of solute divided by kilograms of solvent
Since 1 kg equals 1000 g, 889 g is 0.889 kg.
Therefore, m = 1.43/0.889 = 1.61 molal.
Answer:
10 °C
Explanation:
Greetings,
As per atmospheric conditions, unsaturated air cools consistently at a rate of 10 °C for every 1000 meters ascended, whereas saturated air cools at a slower pace beyond the lifting condensation level due to latent heat release during the wet adiabatic process.
Best regards.
Q=? kJ
m= 1.37 kg ×
= 1370 g
c= 4.18 J/g° C
ΔT= <span>89.5-21.3=
68.2˚C
</span>? J = (1370 g) (4.18 J/g˚C) <span>(68.2˚C)
</span>q = 390,554 J ×
q = 391 kJ
