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Atoms And Molecules

Question
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The mass of planet Jupiter is 1.9 x 1027 kg and that of the sun is 1.99 x 1030 kg. The mean distance of the Jupiter from the sun is 7.8 x 1011 m. Calculate the gravitational force which the sun exerts on Jupiter.

Solution

Given comma Mass space of space Sun comma space straight M space equals space 1.99 space cross times space 10 to the power of 30 kg Mass space of space Jupiter comma space straight m space equals space 1.9 space cross times space 10 to the power of 27 kg Mean space distance space between space straight b divided by straight w space jupiter space and space Sun comma space straight r space equals space 7.8 space cross times space 10 to the power of 11 space straight m Gravitational space constant comma space straight G space equals 6.67 space cross times space 10 to the power of negative 11 end exponent space Nm squared divided by kg squared therefore space space space space straight F space equals space GMm over straight r squared space space space space space space space space space space space equals space fraction numerator 6.67 space cross times space 10 to the power of negative 11 end exponent cross times space 1.99 space cross times space 10 to the power of 30 space cross times space 1.9 space cross times space 10 to the power of 27 over denominator left parenthesis 7.8 space cross times space 10 to the power of 11 right parenthesis squared end fraction space space space space space space space space space space space equals space 4.145 space cross times space 10 to the power of 23 straight N.
 
F is the gravitaional force which the Sun exerts on Jupiter. 

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Some More Questions From Atoms And Molecules Chapter

What is the mass of:

(a) 1 mole of nitrogen atoms

(b) 4 moles of aluminium atoms

(c) 10 moles of sodium sulphite.

Convert into mole

(a) 12 gm of oxygen gas

(b) 20 gm of water

(c) 22 gm of carbon dioxide.

What is the mass of?

(a) 0.2 mole oxygen atoms.

(b) 0.5 mole of water molecules.

Calculate the number of molecules of sulphur (S8) present in 16 gm of solid sulphur.

Calculate the number of aluminium ions present in 0.56 gm of aluminium oxide.

Explain law of conservation of mass.

50 g of 10% lead nitrate is mixed with 50 g of 10% sodium chloride in a closed vessel. After the reaction has taken place, it was found that 6.83 g of lead chloride was precipitated. Besides, the reaction mixture contained 90 g water and sodium nitrate. Calculate the amount of sodium nitrate formed.

Name and explain two important laws of chemical combination ?

What are the postulates of Dalton’s atomic theory of matter?

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