One mole of particles of any substance contains how many particles? A) 10^6 B) 3

Question

One mole of particles of any substance contains how many particles? A) 10^6 B) 3 times 10^-10 C) 3 times 10^10 D) 6.022 times 10^23 E) 6.002 times 10^-23 Avogadro's number is the number of A) atoms in 1 mole of an element. B) psi (pounds per square inch) in I mole of a substance. C) grams in 1 mole of a substance. D) moles in 6.022 times 10^23 grams of an clement. E) moles in 6.022 times 10^23 pounds of an element. One mole of potassium has a mass of ______. A) 19.00 g B) 30.98 g C) 6.022 times 10^23 g D) 39.10 g E) 31.00 g One mole of helium gas has a mass of _____. A) l00 g B) 2.00 g C) 3.00 g D) 4.00 g E) 8.00 g Which of the following quantities has the smallest mass? A) 1 mol Ne B) 2 mol Al C) 3 mol C D) 4 mol He E) 5 mol H_2 The molar mass of C_3H_8O_2 (four significant figures) is ____. A) 76.09 g B) 60.00 g C) 29.06 g D) 69.02 g E) 13.00 g

Explanation / Answer

1. One mole of any particles of any substance contains Avogadro number of particles ie 6.022*10^23 number of particles

So D) is the correct option.

2. Avogadro's number is the number of atoms in 1 mole of an element.

So A) is the correct answer.

3. One mole of Potassium has a mass of 39.10 g

So D) is the answer.

4. One mole of He gas has a mass of 4 g

So D) is the answer

5. 5 moles H2=5*2 g=10 g which is the smallest mass present among the given substances.

So E) is the answer.

6. Molar mass of C3H8O3 is 76.09 g

So A) is the answer

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