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1. A beaker contains a clear, colorless liquid. It has three chemical substances in it, two are liquid and one of them is a solid. How could you determine if it has water, ethanol, and table salt? Remember you're not allowed to taste it.
2. Is it possible for the sum of a column of numbers, each containing two significant figures, to have more than two significant figures? Explain.
3. How many significant figures should be there in the answer to the following calculation?
(35.2-30.1) x 1.23 = ____________
The thermochemical equation for the burning of ethyl alcohol is C2H5OH(l) + 3O2(g) --> 2CO2(g) + 3H2O(l) ?H = -1,367 kJ What is the enthalpy change (in kJ) for burning 9.68 g of ethyl alcohol
a person accidentally swallows a drop of liquid oxygen o2l which has a density of 1.149 gml. assuming the drop has a
What is the relationship between the factor R2 and the following factor, labled R3: R3= Volume of H2(g) produced per mol o zinc that reacts.
Compare the SI units of specific heat and latent heat and explain any differences. Give two examples each of good thermal conductors and good thermal insulators. In general, what makes a substance a conductor or an insulator?
All the stable isotopes of boron, carbon, nitrogen, oxygen, and fluorine are shown in the chart in the right hand column (in red), along with their radioactive isotopes with t1>2 7 1 min (in blue). Write the chemical symbols, including mass and a..
Problem- Water freezes at -10 deg Celsius. Determine the sign of delta S, delta H and delta G for the freezing process and explain why
What is the average and percent error of your measurements? Again, work must be shown to receive credit. How do your results compare to your first set of measurements? Which set is more accurate? More precise? Please explain.
a mass of solid aluminum is at its melting point. what is the maximum mass of this sample that can be melted by 120 kj
Identify all the possible macrostate and the corresponding microstates in a system consisting of two communicating containers and four atoms
The active ingredient in Pepto-Bismol is bismuth subsalicylate, C7H5Bi04. Anslysis of a 1.500-g sample of Pepto-Bismol yeilds 346 mg of bismuth. What percent by mass is bismuth subsalicylate
Assuming that the temperature is 293K and using Redlich-Kwong equation of state, calculate the volume of ambient pressure (1 Bar) nitrogen that can be compressed into the cylinder.
You have a volume of 100 L at a concentration of 100 PPM of benzene. If you later sampled from this known concentration at a temperature of 15° C
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