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A thief plans to steal a gold sphere with a radius of 28.8 cm from a museum. If the gold has a density of 19.3 {rm g/cm}^3, what is the mass of the sphere? [The volume of a sphere is V = (4/3)pi r^3.]
If 35.27 g of sodium carbonate react completely, how many grams of H2O will be produced?
how many grams of K2SO4 would you need to prepare 1500g of 5.0% K2SO4 (m/m) solution?
Determine after how many days will one-sixteenth of a given amount of radon-222 remain and Determine the values of Delta E and Delta H for the system?
Explain why it takes longer time when anyone cook an egg in boiling water while camping at in elevation of 0.5km in the mountain than it does it home.
In the reaction below, 4.86 atm each of H2 and Cl2 were placed into a 1.00 L flask and allowed to react: H2(g) + Cl2(g) 2 HCl(g) Given that Kc = 89.9, calculate the equilibrium pressure of HCl.
What was the wavelength of the second photon emitted?
9.780 grams of gaseous mixture contains ethane ,C2H6 and propane ,C3H8. it needs 1.120mol of oxygen when complete combustion to form CO2 and H2O. Compute the mass percent of C2H6 in the original mixture.
Calculate the resulting pH if 455 mL of 0.200 M HCl is mixed with 315 mL of 0.0850 M Ca(OH)2.
For the following amino acids, indicate how they might interact to contribute to the tertiary or quaternary structure of a protein. choose from among the following: disulfide bond, salt bridge
A steel cylinder with nitrogen, hydrogen, and ammonia gases is at 500°C and 4.91 atm. If the partial pressure of nitrogen is 1850 mmHg and hydrogen is 1150 mmHg
A 325-mL sample of solution contains 25.3 g of CaCl2, which is fully dissolved. Calculate the molar concentration of Cl- in this solution.
if a gas occupies a volume of 5 L at 546 K and 2.5 atm, what is its volume at standard pressure and temperature.
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