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Glycine, an amino acid used by organisms to make proteins, is represented by the following molecular model.
(a) Write its molecular formula.
(b) Determine its molar mass.
(c) Calculate the mass of 3 moles of glycine.
(d) Calculate the percent nitrogen by mass in glycine.
the secondary bonding of gas molecules to a solid surface is a common mechanism for measuring the surface area of
In a gas mixture, the partial pressures are nitrogen 435 , oxygen 145 , and helium 240 . What is the total pressure ( torr) exerted by the gas mixture?
Which of the following is not an application of colligative properties? A) reducing boiling points of pure liquids at increased altitude B) adding silver to mercury to lower the vapor pressure of mercury C) melting snow by application of salt D) d..
a .6004-g sample of nicu condenser tubing was dissolved in acidand diluted to 100.0 ml in a volumetric flask. titration
the combustion of propane illustrated by the following reaction releases 2428 kj per mole of reaction. a sample of
Isopropyl alcohol, a substance sold as rubbing alcohol, is composed of C, H, and O. Combustion of 0.255 g of isopropyl alcohol produces 0.561 g of CO2 and 0.306 g of H2O. Determine the empirical formula of isopropyl alcohol.
A 8.0 L sample at 25 °C and 1.00 atm of pressure contains 0.5 moles of a gas. If an additional 0.75 moles of gas at the same pressure and temperature are added, what is the final total volume of the gas?
A 0.479 g sample of nitrogen, oxygen or neon gas occupies a volume of 265 mL at 157 kPa and 20?C. What is the molar mass and identity of the gas
The OH- concentration in a 2.5×10-3 M Ba(OH)2 solution is A) 4.0 × 10-12 M. D) 1.2 × 10-2 M. B) 2.5 × 10-3 M. E) 0.025 M. C) 5.0 × 10-3 M.
Given the reaction at a certain temperature: 2 HI H2 + I2. at equilibrium, the partial pressure of HI is 1.8 x 10^ -3 atm, and the partial pressures for H2 and I2 are 0.10 atm each.
which of the following equations represents the proper net ionic equation for the complete neutralization reaction
Write a balanced molecular equation for these ten combinations.
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