The number of moles in each sample will be 0.391 moles, 30.7 moles, 0.456 moles, and 1350 moles
What is the number of moles?The number of moles of a substance is the ratio of the mass of the substance to the molar mass.
In other words; mole = mass/molar mass.
Thus:
moles of 18.0 g [tex]NO_2[/tex] = 18.0/46= 0.391 moles
moles of 1.35 kg [tex]CO_2[/tex] = 1350/44= 30.7 moles
moles of 46.1 g [tex]KNO_3[/tex] = 46.1/101.1= 0.456 moles
moles of 191.8 kg [tex]Na_2SO_4[/tex] = 191800/142= 1350 moles
More on the number of moles of substances can be found here: https://brainly.com/question/1445383
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