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Two molten salts were electrolysed in a series. One salt was mercury (II) bromine and the other was a salt of an unknown metal M. In the time taken to deposit 4g of mercury only 0.6g of metal M was produced. Calculate the charge on the ion of M. Hg = 200, M = 60.
How many grams of Na2SO4 (FM 142.01) should be added to how many grams of sulfuric acid (FM98.08) to give 1.00L of buffer with pH=2.80 and a total sulfur (=SO4^2- + HSO4^1- + H2SO4) concentration of 0.200M
When inputting the numbers in the calculator can i also please see how one would input the numbers when solving the predicted pressure using van der walls equation?
The most common source of copper Cu is the mineral chalcopyrite CuFeS2. How many kilograms of chalcopyrite must be mined to obtain 300.g of pure Cu
1. What is the ph of a solution that results from adding 250 ml of .50 m naoh to 750 ml of .50 m hf? 2. What is the ph of a buffer composed of .035 m h2po4 and .65 m hpo4?
A 275.0 mL sample of O2 is collected over water at 60.0 degrees Celsius. The total pressure is 755 torr. What is the volume of the O2 at STP? (The vapor pressure of water at 60 degrees Celsius is 149 torr)
Water vapor can be maintained at 100 oC and 2 atm pressure for a time; it will spontaneously revert to a liquid. calculate delta H, delta S, delta G for g->l. Assume vapor behaves ideally and liquid is basically imcompressible.
Ammonia, NH3, reacts with the hypochlorite ion, OCl-, to produce hydrazine, N2H4. How many moles of hydrazine are produced from 5.85 mol of ammonia if the reaction has a 78.2%
The probability of finding an electron at a point in an atom is referred to as the probability density (). The spatial distribution of these densities can be derived from the radial wave function and angular wave function , then solving the Schrdinge..
suppose that you are the chief economic advisor to the president of the united states. you are asked to propose a
How high must a waterfall be for the water to change temperature by 0.1K during its fall (assuming no evaporation)
In an experiment, 0.500 L of 0.020 mol L ^-1 NaOH(aq) is rapidly mixed with an equal volume of 0.020 mol L^-1 HCN(aq). Calculate the time, in seconds, required for this [OH] to decrease to 1.0×10^4 mol L^-1. (Hint: Start from the rate law in the f..
A 0.75 L bottle is cleaned, dried, and closed in a room where the air is 22 degree Celsius and 44% relative humidity (that is, the water vapor in the air is 0.44 of the equilibrium vapor pressure at 22 degree Celsius). The bottle is brought outsid..
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