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Given a column of air with a pressure of 1.57 *10^5 Pa and an area of 1.15 m^2 and given that the acceleration due to gravity is 9.8 m/s^2, what is the mass of this column?
The student ended up calculating that he/she has 2.19 ppm of Vitamin B2 in the diluted sample. Calculate the percent of the RDI of Riboflavin satisfied by consuming this tablet
A patient needs 2.40×10-2 of a sulfa drug. There are 8.00 tablets in stock. How many tablets should be given?
What is the density of a substance if a 2.50mL sample has a mass of 0.880g at room temperature? ( show calculations) What is the specific gravity of the substance?
Unit Conversions A solution (? = 1.03 g/mL) that is a mixture of water and 5wt% sufuric acid (H2SO4) ?ows through a 45-m long pipe with a 6.0 cm diameter at a rate of 87 L/min. a. What is the molarity (mol/L) of sulfuric acid in the solution?
A system absorbs 192 kj of heat and the surroundings do 110 kj of work on the system. what is the change in internal energy of the system.
what is the maximum mass of CO2 that can be produced from the combustion of .377g C2H5OH
.20g of methyl alcohol, CH3OH, are dissolved in 16.8g of water, H2O. What is the mole fraction of the solute.
What color is the acetic acid plus methyl orange after addition of sodium acetate solution and what does this tell you about
what is the wavelength of a photon that has three times as much energy as that of a photon whose wavelength is 779 nm.
a mass of 2.50 g of hydrated copper sulfate is placed in a crcible and heated. on heating, 1.59 g of white anhydrous copper sulfate is left behind. determine the ratio of water to copper sulfate.
To find the pKa of X-281, you prepare a 0.075 M test solution of X-281. The pH of the solution is determined to be 3.00. What is the of X-281.
According to the data, what is the value of delta H for the reaction.
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