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Why does a vinyl or tile floor feel colder to the bare feet than does a rug, even though both are in contact and at the same temperature? What determines the phase of a substance?
The atomic masses of ^10B and ^11B are 10.0129 amu and 11.0093 amu., respectively. calculate the natural abundances of these two isotopes. The average atomic mass of B is 10.811 anu
How many numbers without decimal points must you select w/o replacement from the range [1, 101] in order to guarantee: that at least 1 odd number is chosen? that at least 1 even number is chosen?
a a catalyst may be defined as a substance that enhances the rate of a chemical reaction without being consumed in the
Which kind of properties are primarily affected by small amounts of impurities in semiconductor crystals
The pH difference across the membrane of a glass electrode is 3.83. How much voltage is generated by the pH gradient at 25 degrees Celsius and 37 degrees Celsius
1. an object weighs 8.22lbs.what is the mass in grams.2. a piece of lumber measures 98.4cm long.what is the length in
Predict what you would expect to observe when each of the following substances is mixed with NaI/acetone. Would you expect a difference in their relative rates of reaction
Calculate the heat energy released when 19.6 g of liquid mercury at 25.00 °C is converted to solid mercury at its melting point.
The density of bromine at room temperature is 3.12 g/mL. What volume of bromine is required if a chemist needs 36.5 g for an experiment?
a 4.22g sample of cus was added to excess hcl and the resulting h2s was collected over water. what volume of h2s was
if you mixed 100 ml of 0.1M KI with 100ml of 0.1M K2S2O8. How will you calculate the diluted (or "new") concentrations of them
explain why if benzoic acid were substituted for 2-methoxyphenylacetic acid in this experiment the enantiomeric ratio
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