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To get an estimate of the number of beans in the jar you weigh six beans and obtain masses of 3.15, 3.12, 2.98, 3.14, 3.02, and 3.09 g . Then you weigh the jar with all the beans in it, and obtain a mass of 2082g . The empty jar has a mass of 687g . Based on these data estimate the number of beans in the jar.
Please explain the following technical terms used in mass spectrometry: a) Molecular ion,
For methanol, CH3OH, the molar enthalpy of fusion is 3.16 kJ/mol at the melting point T=175.2 K. Calculate the freezing point depression constant,k, of methanol
A 2 mL solution containing 1.40 uCi/mL is injected into the blood stream of a patient. After dilution, a 1 mL sample is withdrawn and found to have an activity of 2.9 * 10-4uCi. Calculate the blood volume,
The temperature of a lead fishing weight rises from 26 degrees Celsius to 38 degrees Celsius as it absorbs 11.3 J of heat. What is the mass of the fishing weight in grams.
A lake with a cross sectional- area of 1km^2 and a depth of 125m has an euphotic zone that extends 15m below the surface what is the maximum weight of the biomass (in grams of carbon) that can be decomposed by aerobic bacteria
diazomethane and ozone both behave as 1,3 dipoles. Indicate, by drawing their resonance forms, how they can behave as 1,3 dipoles and draw the products of the reaction with styrene.
If the pressure of "wet" hydrogen is assumed to equal atmospheric pressure and the volume is recorded, will the calculated moles of hydrogen gas be too high or too low?
The temperature inside a pressure cooker is 1150C. Calculate the vapor pressure of the water inside the pressure cooker.
A plot o f the reciprocal concentration of chemical A versus time yielded a straignt line with a slope
The biochemical oxygen demand (BOD) is the capacity of organic and biological matter in natural water to consume oxygen. It is determined experimentally by measuring the oxygen concentration in a sealed sample before and after a 5-day incubation p..
Ammonia burns in pure oxygen and reaction produces nitrogen and water. What is the amount of Nitrogen produced from 45.0 g NH3?
The complex formed between Cu(I) and 1,10 phenanthroline has a molar absorptivity of 7000 L cm-1 mol-1 at 435 nm, the wavelength of maximum absorption.
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