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write a balanced equation for this reaction using the half reaction method.
zinc metal reacting with an aqeous solution containing lead 2 ion
What is the heat required to vaporize 90.8 g of liquid ethanol, C2H5OH, at its boiling point? The ΔH° of vaporization of ethanol is 39.3 kJ/mol. Use a molar mass with at least as many significant figures as the data given.
Answer in kJ
How many grams of BeCl2 are required to make 0.75 L of a 0.25 M solution?
1. Helium takes up 4.71 liters at constant temperature and 200 mmHg. What is the volume of the same helium at 800 mmHg?
How many molecules are there in 3 moles of aluminum chloride?
How many molecules are there in 3 moles of aluminum chloride
An N2 sample was collected over water at 35 degrees Celsius and 879 mmHg. The container’s volume was 9.8 L, and the vapor’s pressure of water at 35 degrees Celsius is 42.18 mmHg. Calculate the mass of N2 collected.
Consider three 1.0 L flasks at 25 °C and 96.6 kPa containing the gases CH4 (flask A), CO2 (flask B), and C2H6 (flask C). In which single flask do the molecules have the greatest mass, the greatest average velocity, and the highest kinetic energy?
a)all
b)flask C
c)flask B
d)flask A
e)none
What volume of O2 would be required to burn 224 mL of H2 at 273K and 1.013 bar?
2H2 + O2 → 2H2O
A 2.0 L sample of carbon monoxide gas was collected in a 2.0 L flask by displacing water at 28 °C and 108 kPa. Calculate the number of CO molecules in the flask. The vapor pressure of water at 28 °C is 3.77 kPa.
