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The radius of the Earth is approximately 6370 km. if one could dig down straight towards the center of the Earth, one would find that the innermost 3480 km (the core) has an average density of about 11.g/cm^3 Above that are the mantle and crust. if the average density of the Earth is 5.5 g/cm^3, what is the average density of the Earth's mantle and crust?
A 1.0 L buffer solution is 0.250 M LiC2H3O2 and 0.050 M HC2H3O2 . Which of the actions will destroy the buffer? (a)adding 0.050 moles of LiC2H3O2(b)adding 0.050 moles of HCl(c)adding 0.050 moles of HC2H3O2(d)adding 0.050 moles of NaOH.
Many elements can have more than one charge or oxidation number. In this set of problems, we will assign oxidation numbers to each atom in sulfate, carbonate, bicarbonate, bisulfate, sulfite, nitrate, nitrite, chlorate, and perchlorate.
Determine How hot should be the air in a ballon be heated if it has initially a volume of 750. L at the temperature of 20 degree celsius and the final volume must be 1,000.l
Calculate the molecular rms speeds of He atoms at 10, 100, 1000 K in units of meters per second and miles per hour.
Determine how many grams of Potassium Sulfate can be formed from 150.0 grams of potassium hydroxide with sufficient sulphuric acid H2SO4?
What is the final temperature of the sand A 1.00 kg gold bar at 1010 K is dropped into 0.750 kg of sand at twenty five degree Celsius?
How many metric tons of 5%-S coal would be needed to yield the H2SO4 required to produce a 2.5-cm rainfall of pH 2.00 over an area of 100 square kilometers?
Determine the volume of the gas at a pressure of 150.0 kPa and a 26 degree Celsius of temperature?
How many moles of NaOH would be required to completley neutralize 37.22mL of 0.25M HCl.
Determine what is the final volume the gas occupies If the pressure of a gas inside the cylinder changes from 840.0 mmHg to 360.0 mmHg,?
Compute the final temperature of the solution (assuming no heat lost to the surroundings ) the solution has a specific heat capacity = 4.18 J/°C·
Determine what is the observed rate for the given reaction - empirically determined rate
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