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The enthalpy change for converting 10.0 g of ice at -25.0°C to water at 80.0°C is __________ kJ. The specific heats of ice, water, and steam are and respectively. For H2O, Hfus = 6.01 kJ/mol, and
A 9.775 g. gaseous mixture contains ethane (C2H6) and propane (C3H8). Complete combustion to form carbon dioxide and water requires 1.120 mol of oxygen. Calculate the mass percent of ethane in the original mixture.
If 5 moles of propane and 10 moles of oxygen are sealed in a container and burned, which reactant will be the limiting reactant, and how many moles of carbon dioxide will be produced?
Octane has a density of 0.692g/mL at 20 C. How many grams of O2 are required to burn 1.00 gal of C8H18?
how many moles of gas are there in a 45.0 l container at 25.0 degress celcius and 500.0 mm hg
The volume of a sample of gas, initially at 25oC, increase from 158 ml to 450 ml. What is the final temperature (C) if the pressure in the container is kept constant.
A sample of a dish from an archaeological dig gave 18 500 disintegrations per gram of carbon per day. A 1.00-g sample of carbon from a modern source gave 22 080 disintegrations per day.
1.248-g sample of limestone rock is pulverized and then treated with 30.00 mL of 1.035 M HCl solution. the excess acid then requires 11.56 mL of 1.010 M NaOH for neutralization.
What causes cycloalkanes to have two less hydrogen atoms than similar alkanes that are open chain ones? i) What is the three dimensional structure of methane? Why?
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?
Calculate the concentration of solution containing one mole of phophate per litre
How long would it take for 1.50mol of water at 100.0 °C to be converted completely into steam if heat were added at a constant rate of 21.0 J/s?
The molarity (moles/L = M) of a solution of 4.0 g NaOH in a total volume of 100.0 mL (or 40 g in 1.0 L) is what?
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