Answer:
True
Explanation:
For, all the gas law calculations, Temperature must be used in Kelvins. This statement is true.
The reason is:
Ideal gas equation is made up of gas laws like P/T (Amonton's Law), V/T (Charle's Law) and combined gas laws like PV/T ( Boyle's Laws, Amonton's Law and Charle's Law).
Charle's Law and Amonton's Law are only valid when temperature values are put in Kelvin and only then V/T or P/T will be constant.
Also, in all the cases, Temperature occurs in the denominator. If we measure temperature values in Celcius, then it will lead to wrong calculations. Also, if we put in the equation, then the equation will have zero in the denominator which will solve as no solution.
But, If we will put 0K in the equation, then it will achieve absolute state where all the things stop and there will be zero entropy (Third law of thermodynamics). In that case, we dont have to think about any of the parameters to be calculated.
Answer:
Explanation:
450 grams of Na2SO4? 450 Na soullnol Na2SO4 16.02x1023 molec, Na₂SO4 = 119x1024. | 142.05g Na25041 Imol Naz
By definition, isotopes belong to the same element with a specific atomic number. The two atoms would have the same number of protons, but differ in the number of neutrons. It can also be stated that the two atoms would have the same atomic number but different mass numbers. These are the requirements for two atoms to be called isotopes.
Answer:
18.8 mL
Explanation:
The dilution formula states that the product between the initial molarity and the initial volume should be equal to the product between the final molarity and the final volume, since the number of moles of a substance remains constant in a dilution process:
We are given the initial molarity of the stock solution , the final molarity of the diluted solution and the final volume of the diluted solution .
Rearranging the expression for the volume of the stock solution, we get:
Therefore, 18.8 mL of the stock solution are required.