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Draw the structure of aspirin and assign each different type of proton(s) a letter. Then assign the letters to their corresponding peak in the NMR spectrum. The peaks are 2.35ppm, 7.15ppm, 7.35ppm, 7.7ppm, and 8.15ppm.
If 348 grams of K2SO4 (molar mass 174 grams) is dissolved in enough water to make 500 milliliters of solution, what are the concentrations of the potassium and sulfate ions.
How much heat is required to warm 227 g of ice from -45.5°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C.
If a raindrop weighs 57 mg on average and 5.1 X 10^5 raindrops fall on a lawn every minute, what mass of rain falls (in kg) on the lawn in 1.5 hours?
In a vessel with a volume 3 m^3 you put 0.03m^3 of liquid water and 2.97m^3 of water vapor so the pressure is 101.33 kPa.
for a certain change the value of U is -2.37 kJ. During the change, the system absorbs 650 joules. how much work did the system do.
Determine which of the following reactions are oxidation-reduction reactions and which are not. what type of reaction do you have if it is not an oxidation-reduction reaction?
HCOOH and HCOONa How many milliliters of HCOOH and HCOONa would you use to make approximately a liter of the buffer?
Liquids "flow" quickly as measured by the speed at which a small amount of liquid will spread itself out to form a puddle. What does this behavior imply about the speeds at which the individual liquid particles are moving relative to each other?
What is the minimum volume of 2.6 M HBr required to completely dissolve 25.0 g of potassium metal?
If it takes 526 J of energy to warm 7.40 g of water by 17 °C, how much energy would be needed to warm 7.40 g of water by 55 °C?
A compound contains only carbon, hydrogen, nitrogen and oxygen. Combustion of 0.314 g of the compound produced 0.426 g CO2, and 0.0620 g H2O
2I2 + N2H4 4HI + N2 a.How many grams of I2 are needed to react with 36.7 g of N2H4?
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