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Suppose you wanted to heat a mug of 250. mL water from room temperature, 25°C, to 100°C to make a cup of tea. How much energy (in joules and in calories) would you need from your microwave?
what volume of nitrogen gas is needed to react completely with 150.0 L of hydrogen in the production of ammonia.
A metal is electrolyzed from aqueous solution by using an electrical current of 1.23 A for 2½ h, and 3.37 g of metal is deposited. In a separate experiment the number of electrons used for the reduction of the metal is 2.
An odorous gas emitted by a hot spring was found to diffuse 2.92 times slower than helium. What is the molar mass of the emitted gas.
Consider an experimental run at 273 rm K where the initial number of moles (n_1) is actually 1.00 rm mol, and the final number of moles (n_2) is 2.00 rm mol.
The activation energy for a reaction is found to be 80 kj/mol. calculate the temperature at which the rate will be ten times that of 0 deg. celsius.
Calculate the partial pressure of carbon dioxide after cooling back down to the initial temperature and the mass percent, the mole fraction, and .
A sample of a gas occupies 1470 mL at 60.7?C and 740 torr. What volume would it occupy at the same pressure and 450?C.
Determine how many micrograms of herbicide are present in 10 lb of soil if the herbicide level in the soil in a corn field was observed at 3.0 ppb. ?
Suppose that an excess of propane, C3H8 burns in 320 g of O2. How many moles of H2O will be formed? C3H8 + 5 O2 → 3 CO2 + 4 H2O
Given that Iron(III) oxide or ferric oxide (molar mass = 159.7 g/mol) reacts with Carbon monoxide (molar mass = 28.0 g/mol).
A cylinder of oxygen gas contains 26.4 g of O2. Another cylinder, twice the volume of the cylinder containing oxygen (and at the same conditions of pressure and temperature), contains CO2 gas.
Which of the following molecules have dipole moments? For the molecules that are polar, indicate the polarity of each bond and the direction of the net dipole moment of the molecule.
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