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Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.505-g sample of Mg metal is added to 150.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. What mass of H2 is formed?
What is the concentration of Mg2+ ions in the resulting solution?
The glass electrode used in commercial pH meters gives an electrical response proportional to the concentration of hydrogen ion. To convert these responses to a pH reading
a solution is prepared by mixing 0.0400 mol ch2cl2 and 0.0800 mol of ch2br2 at 25degc. assuming the solution is ideal
Compute the solubility of CO 2 in H 2 O at 25 oC in moles/L if the partial pressure of CO 2 in the headspace water sample is 1.56 atm.
The heat required to raise the temperature of a large cup of water (for coffee) from room temperature to boiling is approximately 100 kJ. Express this quantity of heat in kilocalories and British thermal units. Show your calculations.
A sample of nitrogen gas in a 4.7-L container at a temperature of 28°C exerts a pressure of 3.6 atm. Calculate the number of moles of gas in the sample.
How long does it take (in minutes) for light to reach Mars from the Sun, a distance of 2.402 × 108 km
the lead in lead pencils is actually almost pure carbon, and the mass of a period mark made by a lead pencil is about 0.0001g. How many carbon atoms are in the period.
How many seconds are required to produce 4.94 mg of chromium metal from an acidic solution of potassium dichromate, using a current of 0.234 A?
A copper, Cu(s), electrode is immersed in a solution that is 1.00 M in ammonia, NH3, and 1.00 M in tetraamminecopper(II), [Cu(NH_3)_4]^{2+}. If a standard hydrogen electrode is used as the cathode, the cell potential, E_cell, is found to be 0.076 ..
A stock solution of NaCl is made taking 150.2g in enough water to make 200.0ml. A 10.00 ml sample of this stock solution is diluted to 250.0 ml.
What mass of F2 is needed to produce 205 g of PF3 if the reaction has a 79.3% yield?
calculate the molality of c2h5oh in a water solution that is prepared by mixing 50.0ml of c2h5oh with 100.0 ml of h2o
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