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A balloon is inflated with 0.2494 g of helium to a pressure of 1.26 atm. If the desired volume of the balloon is 1.250 L what must the temperature be in degree celcious
What is the percent purity of the calcium hydroxide if the titration requires 21.42 mL of the acid to reach the endpoint
What if any experimental evidence do you have that the equilibrium is affected by the addition of concentrated HCL? Explain Are your observation and explanation in A consistent with Le Chatelier's Principle? Explain
A particular compound contains, by mass, 41.4g carbon, 3.47g hydrogen, and 55.1g oxygen a 0.100 mol sample of this compound weights 11.60 g.
A thief plans to steal a gold sphere with a radius of 28.8 cm from a museum. If the gold has a density of 19.3 {rm g/cm}^3, what is the mass of the sphere? [The volume of a sphere is V = (4/3)pi r^3.]
phosphate combines with sodium hydrogen phosphate to yield sodium tripolyphosphate and water
The majority of industrial method for the preparation of elemental phosphorus is heating a mixture of phosphate rock, carbon, and sand in electric furnace. The chemical reactions can be represented by 2Ca3(PO4)2 + 6SiO2 ? 6CaSiO3 + P4O10 and P4O10..
A freshly prepared sample of curium-243 undergoes 3312 disintegrations per second. After 6.00 years, the activity of the sample declines to 2755 disintegrations per second. Calculate the half-life of curium-243. half-life
What are the relative percentages of hydrogen cyanide (HCN) and cyanide ion in a dilute aqueous solution
designing and preparing aqueous buffer solution with the ph indicated.ph3.50your buffer solution must have the capacity
The value of ?Go for the reaction, N2(g) + 3 H2(g) 2 NH3(g) is -32.90 kJ at 298 K. Calculate the value of ?G in kJ at 298 K if the partial pressures of N2, H2 and NH3 are 9.139, 8.009, and 9.718 atm respectively.
If 0.80 g of sulfur dioxide at 10.00 atm pressure (P) dissolves in 5.00 L of water at 25.0°C, how much of it will dissolve in 1 L of water at 9.00 atm pressure (P) and the same temperature?
for the reaction shown below complete the following calculations.nbsph2g c2h4g --gt c2h6ga estimate the enthalpy of
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