Chemistry Answers

what type of elements form positive ions

Write the balanced redox equation for: I^- + OCl^- ---> I₂ + Cl₂

Write the balanced redox equation for: NO + Cu²⁺ ---> NO₃^- + Cu 

Cobalt-60 is used extensively in medicine as source of Y-rays .

What is the half life of Co-60 it's takes 13.0 years to decrease the original activity to 18.0%?

How many mL of 0.25M solution of H2SO4 will react with 10mL of 0.25M solution of NaOH?

Determine the pH of a 0.020 M HNO₃ 

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Postlets in State Molecular Theory of Gus and Alsace.

Determine the composition of a methanol-ethanol mixture over which the equilibrium vapour pressure is 5.0 kPa. Assume that the mixture is ideal.

(Vapour pressure of pure methanol is 8.9 kPa; vapour pressure of pure ethanol is 4.0 kPa)

Report your answer in terms of mole fraction of methanol as a decimal to 3 significant figures. Do NOT include any words, symbols, units or spaces in your answer.

Use the information provided in question 7 to answer the question below.

What is the vapour composition above the mixture of methanol and ethanol?  

Report your answer in terms of mole fraction of methanol as a decimal to 3 significant figures. Do NOT include any words, symbols, units or spaces in your answer.