Question

36
a) which is an example of chemical change? a) dry ice sublimating b) sodium chloride melting c) hydrogen burning d) sucrose dissolving
b) the vapor pressure of water at 17°C is 14mmHg. the pressure of oxygen molecules which are collected over water at a total pressure of 740mmHg at 17°C is? a) 754 mmHg b) 760 mmHg c) 726 mmHg d) 14 mmHg e) none of these

C) which is a strong electrolyte? a)CH3COOH b) NH3 c) CH3OH d) HCl

d)the strongest intermolecular forces between molecules NH3 are: a) hydrogen bonds b) dipole-dipole forces c) London dispersion forces d) covalent bons

e) based on intermolecular forces which of the following would you expect to have the lowest boiling point? a) Na2S b) HF c) NH3 d) N2 e) H2O

f) calculate the number of oxygen atoms in 44.6 g of magnesium nitrite [Mg(NO2)2] MW=116.32 g/mol

g) draw the Lewis structure for 2 possible resonance structures of O3

Answer 1