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3 .What is the resulting volume if the temperature is adjusted to 320K provided that the pressure remains constant?
2. A tank ( not rigid) contains 2.5 litres of helium gas at 280C . At constant pressure, what will
be the volume of the tank after heating it and its content to 430C temperature?
- What amounts of each species is expected to be present at the end of the reaction between 3.2 g of solid gallium and 3.2 g of gaseous oxygen?
- Elemental copper and HNO3 react to form copper (II) nitrate, nitrogen dioxide, and water. What is the percent yield of the reaction where 0.185 Mg of copper and 0.0125 Tg of HNO3 react to form 1.95 x 1020 fg of nitrogen dioxide?
- When 1.25g of H2Se gas is bubbled into a solution containing 2.00g of potassium hydroxide, how many grams of the potassium-containing product forms, assuming that the reaction proceeds with 92.0% yield?
- Phosphorous and hydrogen react to form 4.00 g of product with 35.5 % yield. If 1.05 g of hydrogen remained unreacted, how much phosphorus must have been present at the start?
- How many of each of the spectator ions are present after the reaction of 1.0g calcium sulfate and 1.0g potassium phosphate?
What is the ionic strength of a solution composed
of O.M NaCl and 0.2M Na,SO,?
1. What concentration of NaF do you need to add to a 0.15 M HF solution to get a buffer solution pH of 9.5? The Ka for HF is 7.4x10-4.
A student measured 25ml of 0 2M hydrochloric acid into a conical flask and titrated with with sodium hydroxide.It was found that 15ml of the sodium hydroxide was needed to neutralise the acid.(a)write a balanced chemical equation for the reaction.(b)calculate the concentration of the sodium hydroxide solution.(c)calculate the ph of HCl when the concentration of the acid is 1.4×10^-5M.
6.4 oz of ZnO is 54% Zn. How many grams of ZnO does it contain?
Considering only ions with charges of +1, +2, -1, and -2, or neutral atoms, give the symbols for 4 species that are isoelectronic with Kr.
Calculate the volume of 0.25 of H2SO4 that will contain a 4.5g of the acid
10cm² of carbon (ii)oxide is sparked with 10cm² of oxygen. if all the volume of gases are measured at STP, calculate the volume of the residual gases after sparking
