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Compound (CH3)2CCHCH3 contains 85.63 g carbon per 100.0 g compound. calculate the mass (g) of a sample of (CH3)2CCHCH3 if it contains 148.9 g of carbon.
C 12.011
H 1.008
According to the following reaction, how many moles of water are necessary to form 0.868 moles magnesium hydroxide? magnesium nitride (s) + water (l) --------> magnesium hydroxide (aq) + ammonia (aq)
Calculate the pH of each of the following solutions. (a) 0.115 M HONH2 (Kb = 1.1 10-8)
What is the number of moles of O2 needed to burn 260.0g of C2H2 in the reaction: 2C2H2 + 5O2 yields 4CO2 + 2H2O?
An electron is confined to a one-dimensional box of length L. It falls from the second energy level to the ground state, and releases a photon with a wavelength of 322 nm. What is the length of the box?
a 43 L tank contains a gas under a pressure of 369 atm. What volume would the gas occupy at the same temperature at 710 torr of pressure?
.At 25°C and 1.0 atm, 0.25 g of a gas dissolves in 1.00 L of water. What mass of the gas dissolves in 1.00 L of water at 25°C and 3.0 atm?
what intermolecular force is found in water. draw a picture of 3 water molecules showing this intermolecular force
An aqueous CaCl2 solution has a vapor pressure of 82.2 mmHg at 50 degrees C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent
calculate the minimum number of grams of propane that must be combusted to provide the energy necessary to convert 5.35 of ice at -21.5 to liquid water at 76.0.
The nickel-cadmium battery cell has a standard potential of +1.20 V. The cell reaction is: 2 NiO(OH)(s) + Cd(s) + H2O(l) --> 2Ni(OH)2(s) + Cd(OH)2(s) What is the standard free energy change for this reaction
Solution A is twice as concentrated as solution B but has a smaller absorbance value. Both solutions abosrb maximally at wavelength =585 nm. Give a through explanation for this observation.
A sample of an ideal gas at 1.00 atm and a volume of 1.38 L was placed in a weighted balloon and dropped into the ocean. As the sample descended, the water pressure compressed the balloon and reduced its volume.
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