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An empty flask has a mass of 123.4 g. When the flask is filled with water, the mass is 211.6 g. If 10.0 g of zinc (d = 7.14 g/cm3) are added to the flask filled with water (and the sides of the flask are dried from the displaced water) what is the new mass of the flask?
A fluorinated organic gas in a cylinder is com- pressed from an initial volume of 960 mL at 158 Pa to 478 mL at the same temperature. What is the final pressure? Answer in units of Pa.
A hypothetical molecule, X-Y, has a dipole moment of 1.90 D and a bond length of 169 pm. Calculate the percent ionic character of this molecule.
determine the volume occupied by .582 moles of a gas at 15*C if the pressure is 622 mm Hg?
How much heat is required to warm 215 g of ice from -44.1°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
If 5.40 mol calcium carbide (CaC2) reacts with an excess of water, how many moles of acetylene (C2H2) will be produced?
Assume a density of 1.08g/mL for the solution. A)Find molarity of solution B)Find molality of solution C)Calculate mass percent of solution
How many atoms of neon occupy a volume of 14.3 L at STP.
Zinc citrate (Zn_3(C_6H_5O_7)_2) is an ingredient in toothpaste. It is synthesized by the reaction of zinc carbonate with citric acid. 3ZnCO_3(s) + 2C_6H_8O_7(aq) ---> Zn_3(C_6H_8O_7)_2(aq) + 3H_2O(l) + 3CO_2(g).
Calculate the pH at the equivalence point in a titration between 10.00 mL of acetic acid(0.100 mol/L) and sodium hydroxide (0.100 mol/L).
Calculate the energy in joules and calories lost when 10.0 gm ethanol, {C_2H_5OH}, cools from 62.5 0C to -46.0 0C?
The temperature of a 35.2 g sample of iron increases from 23.7 C to 29.5 C. If the specific heat of iron is 0.450 J/g-K, how many joules of heat are absorbed.
A 270- flask contains pure helium at a pressure of 761 . A second flask with a volume of 455 contains pure argon at a pressure of 730 . If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of ..
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