The balanced equation between the 
and 
is:
Formula of molarity is:
Substituting the values,
So, number of moles of is 
.
From the balanced equation it is clear that for 1 mole of , 2 moles of are required.
Hence, 0.21 mole of = 
Molar mass of = 
So, the mass of = 
The decay of a radioactive isotope can be predicted using the formula: A = Ao[2^(-t/T_0.5)] where A is the amount after time t, Ao is the original amount and T_0.5 is the half-life. Using the equation and the given values, 0.888 g of the sample will remain after 72 minutes.
I am almost positive that the answer is: Plasmas. Let me know if im right or not please!! :)
Answer:
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Answer: Charles's law, Avogadro's law andd Boyle's law.
Charles law states the constant ratio of volume to temperature, at constant pressure. Boyle's law states the constat product of pressure and volumen at constant temperature. Avogadro's law states that equal volumes of gases at the same temperature and pressure have equal number of particles.
So, all those three laws combined state the relation of pressure, volume, temperature and number of particles of a gas, which is what the ideal gas law does: PV = n RT.
