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Assume that amino acids, the building blocks of proteins, can be represented by spheres having a radius of 3 angstroms. Approximately how many amino acids could make up a spherical protein having a radius of 2 nm.
A cylinder contains 250 g of Helium at 200 K. The external pressure is constant at 1 atm. The temperature of the surroundings is lowered by 100 K. Calculate the heat lost or gained by the system in response to this change in the external temperatu..
ampere current have to be applied to plate out 8.00 grams of copper metal from te aqueous copper(II) sulfate solution?
When .100 mole of a compound of carbon, hydrogen and nitrogen was burned completely in oxygen 26.4 g of co2 6.30g of h20 and 4.60 g of NO2 were produced What is the empirical formula
Asuume magnesium exists in three isotopes: Mg-24, Mg-25 and Mg-26. If a sample of magnesium contains 10 million atoms, what is the total mass of the sample in amu?
What is the average mass(in grams) of a flourine atom if Flourine has an atomic weight of 18.998 amu
determine the specific heat capacity of a metal that has a mas of 14 grams. as the metal cools from 400 degrees celcius
a sample of argon gas occupies 125 l at 22c and .975 atm. what volume will it occupy at 60c and .825
Calculate the percent yield for the reaction. A scientist performs this reaction in the lab by starting with 30.02 g of Mg and 0.992 moles of Cl2 gas
Given the following equation, predict what will happen in the following scenarios: 2H2S(g) + O2(g) à 2S(s) + 2H2O(g) 1. If O2 is added, what happens to the concentration of [H2O]
What is the mass of a piece of aluminum that is found to displace 13.4 ml of water and has a density of 2.66 g/cm^3
Find the pH during the titration of 20.00mL of 0.1000M triethylmine, Kb=5.2x10^-4, with 0.1000M HCl solution after the addition of 10.00mL of titrant
you have a 1mm stock solution of arsenic to treat culture cells in a liquid medium. you need to treat your cells with
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