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170mL of an HCl solution with pH of 2.80 is added to 200mL of an HNO3 solution. The resulting pH is 1.40. What was the pH of the original HNO3 solution
What mass of O2 is required for the complete combustion of 68.9 g of pentane, C5H12, to CO2 and H2O?
Hydrogen phosphate buffer, Buffer solutions have the unique ability to resist changes in PH when an acid or base is added to them. One important buffer system that helps to maintain blood pH at a constant value of 7.4 is the hydrogen phosphate buf..
The J=0 to J=1 transition for carbon monoxide (12C16O) occurs at 1.153 X 10^5 MHz. Calculate the bond length of carbon monoxide.
By mass spectral analysis, a sample of strontium is known to contain 2.64x1010 atoms of Sr-90 as the only radioactive element. The absolute disintegration rate of this sample is measured as 1238 disintegrations per minute. Calculate the half-life ..
A solution is prepared by mixing 63.0 mL of 5.00 M HCl and 20.0 mL of 8.00 M HNO3. Water is then added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution.
a student pumped some helium gas into a balloon. when this balloon was connected to an open ended U-tube containing some oil (density=9.18 g cm-3 the oil was displaced 112 mm towards the atmosphere. what is the pressure of the helium inside this b..
An organic liquid is a mixture of methyl alcohol and ethyl alcohol. A 0.220g sample of the liquid is burned in an excess of O2(g) and yields 0.342 g CO2(g). What is the mass of methyl alcohol in the sample?
The decomposition of potassium chlorate (KClO3 ) is used as a source of oxygen in the laboratory. How much potassium chlorate is needed to produce 24.1 mol of oxygen?
Determine what percent by weight of sodium carbonate does it contain If the specific gravity of the sodium carbonate solution = 1.25,?
determine K for this reaction When a sample of 5.63 grams of pure C 5 H 6 O 3 (g) was sealed into an otherwise empty flask of 2.50 L and heated to 200.
A solution contains 1.0 x 10-5 M Na3PO4. Calculate the minimum concentration of Ag+ that would cause precipitation of solid Ag3PO4.
What mass of carbon reacts completely with 17.8 grams of SiO2 according to the following equation? SiO2 (s) + 2C (s) → SiC (s) + 2CO (g)
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