Physical Chemistry Answers

Arrange in order of increasing vapour pressure at /(25^{0}C\)

30L

313K

The concentration of sodium ions in blood plasma is 142 mM/l (millimole per litre). What mass of sodium ions is contained in 1 litre of blood plasma?

Write the electronic configuration of the following diatomic atoms/molecules

i)Li2

ii)N2

iii)B2^2-

What are the signs for the entropy changes associated with the following process CO2(s) → CO2(g).

Three examples of solid foam

the method of silver

What is gold number?

When baking soda (NaHCO3) is heated, carbon dioxide (CO2) is released. This 

makes bread, cookies and other pastries to rise. If 42.0 g of NaHCO3 was 

used, how much CO2 was released? (NaHCO3 = 84.00 g/mol, CO2 = 44.01, 

Na2CO3 = 105.99 g/mol, H2O = 18.02 g/mol)

2NaHCO3  Na2CO3 + H2O + CO2

Calculate the mass of glucose that must be added to 2.85kg of water at 65°c to lower the vapour pressure by 10tor, if the vapour pressure of pure water is 188tor.