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If 45.0mL of ethanol {(density = 0.789 g/mL) initially at 9.0 degrees C is mixed with 45.0mL of water (density} = 1.0g/mL) initially at 28.3 degrees C in an insulated beaker, and assuming that no heat is lost, what is the final temperature of the mixture?
a bent molecule a methyl azide has the formula ch3n3 the figure on the right shows how the atoms are connected but not
A 1- flask is filled with 1.45 of argon at 25 . A sample of ethane vapor is added to the same flask until the total pressure is 1.30 .What is the partial pressure of argon, , in the flask?
calculate the osmotic pressure in mm Hg of 6.00 L of an aqueous 0.889 m solution at 30.°c, if the solute concerned is totally ionized into three ions
Write the balanced equation. BaCl2(aq) + 2AgNO3(aq) ? 2AgCl(s) + Ba(NO3)2(aq) b. What mass of AgNO3, in grams, is required for complete reaction with 0.156 g of BaCl2? What mass of AgCl is produced? 0.156 g BaCl2 0.2547 g AgNO3 0.2149 g AgCl Are t..
A 0.2527-g sample of a mixture of Mg(OH)2 and Al(OH)3 was treated with 50.00 mL of 0.225 mol L^-1 HCl(aq). The resulting solution required 13.73 mL of 0.176 mol L^-1 NaOH(aq) to neutralize the excess, unreacted HCl. What was the percentage by mass..
When 5.19g of NaCl is dissolved in 85.0 mL of water at 22.2 degrees Celsius, the temperature of water drops by 6.6 degrees Celsius. Calculate the heat of solution of NaCl.
A sealed container contains 6 mol of hydrogen and 1 moles of nitrogen gas. If the total pressure in the container is 1.5 atm, what is the amount of pressure exerted by the hydrogen?
Of the two materials VO and NiO, which would be expected to exhibit more metallic properties?
calculate the moles of hydrogen and the pressure in each flask where the volume is negligible. Each flask is originally 275K with .455 mols of hydrogen gas and .7atm of pressure. Then one flask is heated to 500K while the other remains at 275K
Calculate the pH of CO2-saturated water at 25 degrees C, given that the CO2 concentration in air is 366 and that for carbon dioxide the Henry's Law constant KH=3.4E-2 mol L-1 atm-1 at 25 degrees C.
Energy cannot be transformed from one type to another (e.g., potential to kinetic). 3. Matter can be transformed into energy in a chemical reaction. 4. Energy can be created spontaneously from nothing.
Study the structures of the chlorophylls and carotenoids and predict the relative polarity of each set of pigments below
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