Question Text
Question 2 :
Which one of the following laws directly explains the law of conservation of mass?<br/>
Question 3 :
Which gas law relates the volume of a gas to the number of molecules of the gas?<br/>
Question 4 :
Find the total number of pennies in a tenth of a mole of pennies.
Question 5 :
A sample of ammonia has a mass of $51.1g$. How many molecules are in this sample?
Question 6 :
How many moles are present in $6.023\times 10^{22}$ molecules of $CO_2$?<br>
Question 7 :
What is the volume of $3.0\times {10}^{20}$ molecules of $HCl (g)$?
Question 8 :
The critical volume of a gas is 0.036 $lit. mol^{-1}$. The radius of the molecule will be (in cm):<br/>(Avogadro Number = $6 \times 10^{23}$)<br/>
Question 9 :
Law of definite proportion does not apply to nitrogen oxide because:
Question 10 :
If the ratio of the atoms by mass is altered then :
Question 12 :
In a compound the ratio of the atoms or element by mass remains always same irrespective of :<br/>
Question 13 :
Different samples of water were found to contain hydrogen and oxygen in the ratio of 1 : 8. This shows the law of:<br/>
Question 14 :
The ratio of mass of nitrogen and oxygen in nitric oxide is in :
Question 15 :
The % of Copper and Oxygen in samples of CuO obtained by different methods were found to be the same. This proves the law of:<br/>