General Chemistry Answers

Calculate the concentration of urea (NH2CONH2) a non-electtrolyte that has an osmotic pressure of 30.0 atm at 293.15 K (Hint: Use 0.08206 as the value of R)

The energy associated with a material’s phase change is called:

a gas occupies a volume of 300cm3 at a temperature of 27 degree Celsius what's is it's volume at 54 degree Celsius when the pressure is constant

write the balanced redox equation of isopropyl alcohol and potassium dichromate.

Direction: Answer the following questions:

1. What unit is used to describe reaction rate?\

2. In a reaction between Mg and hydrochloric acid

Mg (s) + HCl (aq) --> MgCl₂ (aq) + H₂ (g)

The data below was recorded. Examine the data. What is the average rate of reaction?

Time Mass of Magnesium

0 0.012

2 0.010

6 0.006

8 0.004

what is the maximum amount of SF₄ that can be made in the reaction 16.87g of NaF and 98.42g of SCI₂

Calculate the molar mass of powdered fruit drink mix, made from sucrose (C₁₂H₂₂O₁₁).

Iron can be extracted from haematite, Fe2O3, using either C or CO2 as the reducing agent. The reactions are shown below.

Fe2 O3 (s) + 3 C(s) → 2 Fe(s) + 3 CO(g) ΔH = +492.7 kJ /mol Fe2 O3 (s) + 3 CO(g) → 2 Fe(s) + 3 CO2 (g) ΔH = - 24.8 kJ/mol Substance S° (J/ K·mol) Fe2 O 3 (s) 87.4 Fe (s) 27.3 C (s) 5.7 CO (g) 197.6 CO 2 (g) 213.6 Use available data given to:

1. Calculate the minimum temperature at which reduction with carbon is feasible

2. Prove by calculation that reduction with carbon monoxide is feasible at all temperatures.

The molar cconcentration of a solution of ammonium molibdate in an aqueous solution which contains 48 parts per million of MoMolybdenum is?