Molarity and molality
A solution contains 410.3 g of H2SO4 per litre of solution . If the density is 1.243 g/ml, what will be its molarity and molality?
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A cylinder of compressed nitrogen gas contains 867 g N2. If the volume of the cylinder is 22.5 L, what is the pressure of the N2 if the gas temperature is 298K?
What proportions of ethanol and water should be mixed in order to produce 100 cm3 of a mixture containing 50 percent by mass of ethanol?
Has the industry made any recent advances in farming that have chemical foundations?
A bacterial culture isolated from sewage produced 35.5 mL of methane, CH4, at 31 oC and 753 mmHg. What is the volume of this methane at STP?
Holding a long rope by its upper end, you lower it onto a scale. The rope has a mass of 0.13 kg per meter of length, and is lowered onto the scale at the constant rate of 1.4 m/s. Calculate the thrust exerted by the rope as it lands on the scale.
What is the pH after 0.195 mol of NaOH is added to the buffer? Assume no volume change on the addition of the base.
What is the tangential acceleration of a bug on the rim of a 12.0 in. diameter disk if the disk moves from rest to an angular speed of 78 revolutions per minute in 4.0 s?
Calculate the freezing point of a nonionizing antifreeze solution containing 388 g ethylene glycol, c2h6o2 and 409 g of water
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