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Knowing the value of g, how can we calcu...

Knowing the value of g, how can we calculated the mass and density of Earth?

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Mass And Density On Earth

Assertion: For calculating the molality or the mole fraction of solute, if the molarity is known, it is necessary to know the density of the solution. Reason: Molality, molarity and the mole fraction of solute can be calculated from the weight percentage and the density of the solution.

The density of a population can be calculated by :

Molarity: A sample of commercial sulphuric acid is 98% H_(2) SO_(4) by mass and its specfic gravity is 1.84 . Caculate the molartiy of this sulburic acid solution. Strategy: The density of a solution (grams per milliliter) is numercially equal to its specific gravity. Thus, the density of the solution is 98% H_(2) SO_(4) by mass. Thus, every 100g of soultuon contains 98g of pure H_(2) SO_(4) . From the mass of H_(2) SO_(4) . we calculate its moles and from the density , we calculate its volume. Finally, we calculate molartity using its definition.

The acceleration due to gravity g on the earth is 9.8m//s^(2) . What would be the value of g for a planet whose size is the same as that of earth and the density is twice that of earth?

Explain how the knowledge of g helps us to find (i) mass of earth and (ii)mean density of earth?

If we know the capacitance of a given conductor then can we calculate the maximum charge which it can store?

Converting molarity to mole fraction, mass percent and molality: A 0.750 M solution of H_(2)SO_(4) in water has a density of 1.049 g mL^(-1) at 20 ^(@)C . What is the concentration of this solution in (a) mole fraction, (b) mass percent. And (c ) molality? Strategy: To solve this problem, we need to know the mass of solute as well as mass of solvent. There is 0.750 mol H_(2)SO_(4) per liter of solution. Let's pick an arbitrary amount of the solution that will make the calculations easy, say 1.00 L . Consider 1 L (=1000 ml) of solution and calculate its mass, using the density. We can then calculate the mass of H_(2)SO_(4) and find the mass of H_(2)O by difference. Now we can calculate the mole fraction, mass precent and morality.

If you had to calculate the mass of the earth , how would you do it ?