BaS crystallizes in a cubic unit cell with S2- ions on each corner and Ba2+ on each face. How many Ba2+ and S2- ions are in each unit cell of BaS?

The boiling point elevation of an aqueous sucrose solution is found to be 0.67°C. What mass of sucrose (molar mass= 342.30 g/mol) would be needed to dissolve in 500.0 g of water? Kb (water) = 0.512°C/m.

Soap has an ionic and a polar end. It works well to remove oil by

Which of the following represent the addition polymer formed from the compound below? CH2=CH-CH3

Ethanol (C2H5OH) melts at -114°C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/gK and 2.3 J/gK, respectively. How much heat (kJ) is needed to convert 25.0 g of solid ethanol at -135°C to liquid ethanol at -60°C?

List the compounds in order of decreasing boiling point. CH3CH2CH3 He​ CH3CHO  

Which of the following compounds is least soluble in octane (CH3CH2CH2CH2CH2CH2CH2CH3)?

Place the following substances in order of increasing vapor pressure at a given temperature. NF3 NH3 BCl3  

What mass (in g) of NH3 must be dissolved in 475 g of methanol to make a 0.147 m solution?

How much energy must be removed from a 125 g sample of benzene (molar mass = 78.11 g/mol) at to liquify the sample and lower the temperature to 335.0 K? The following physical data may be useful.ΔHvap = 33.9 kJ/molΔHfus = 9.8 kJ/molCliq = 1.73 J/g°CCgas = 1.06 J/g°CCsol = 1.51 J/g°CTmelting = 279.0 KTboiling = 353.0 K