Potassium K
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Formula: molality, m = n solute / kg solvent
n solute = # of moles of solute = mass(g) / molar mass
Molar mass of Mg Br2 = 184.11 g/mol
m = [46g / 184.11 g/mol] / 0.5 kg = 0.50 mol/kg
Answer:
platinum-189 symbol is PT
Answer:
P₂ = 1102 Kpa
Explanation:
Given data:
Initial pressure = 1000.0 Kpa
Initial temperature = 20.0°C
Final temperature = 50.0°C
Final pressure = ?
Solution:
Initial temperature = 20.0°C (20+273 = 293 K)
Final temperature = 50.0°C (50+273 = 323 K)
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
1000 Kpa / 293 K = P₂/323 K
P₂ = 1000 Kpa × 323 K / 293 K
P₂ = 323000 Kpa. K /293 K
P₂ = 1102 Kpa
