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A gas-filled weather balloon with a volume of 37.4 L is released at sea-level, where the prevailing conditions are 756.8 torr and 20.8°C. The balloon can expand to a maximum volume of 900 L. If the balloon rises to an altitude at which the temperature is -2.8°C and the pressure is 0.068 atm, what will the volume of the balloon be?
How many grams of potassium chlorate decompose to potassium chloride and 510. mL of O2 at 128°C and 652 torr?
A mixture of O2, CO2, and N2 has a total pressure of 762. torr. In this mixture the partial pressure of O2 is 112. torr and the partial pressure of CO2 is 185. torr. What is the partial pressure of the N2 (in torr)?
Calculate the theoretical yield of when 114 g of C2H6 reacts with 206g of Cl2 , assuming that and react only to form and .
A baseball pitcher's fastball is clocked at 100 miles per hour (mph). Calculate the wavelength of a 141 g baseball in nm at this speed.
A 1.73 g sample is dissolved in 100.0 mL water is titrated with 0.500 M NaOH; it takes 39.4 mL to reach the equivalence point. What is the molecular mass (g/mol) of pyruvic acid?
Given the reaction 6CO2+6H2O-> C6H12O6+6O2. What is the total number of moles of water needed to make 2.5 moles of C6H12O6?
Draw the Lewis structures of the following compounds and find out number of electron groups, number of lone-pairs, geometry of electron
A sample of a new compound is burned in an excess of air to produced CO2 and H2O. If 0.468 g of the sample produce 0.458 g of CO2 and 0.094 g of H2O and the molar mass is about 230, what is the likely molecular formula of this compound?
Your friend decides to decrease cooking time for spaghetti noodles by adding table salt to 2.0 L water. How much table salt (NaCl) must be added to the water in order to raise the boiling point by 4.0?C? (Kf = 1.86?C/m, Kb = 0.512?C/m)
Calculate the reaction Zn(s) + 2HCl(aq) ! ZnCl2(aq) + H2(g) What mass of ZnCl2 (MW = 136.3 g/mol) can be prepared from the reaction of 3.27 grams of zinc (MW = 65.38 g/mol) with 3.00 grams HCl (MW = 36.46)?
Give the number of valence electrons of each element and draw the Lewis structure for each molecule.
a piston has an external pressure of 10.0 atm. How much work has been done is the cylinder goes from a volume of 0.180 liters to 0.630 liters
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