How many atoms (or molecules) are present in 1 mole?
A) 1
B) 6.022
C) 6.022×1023
D) 6.022×1020

c

Explanation:

c

D

Explanation:

1 mole = 6.022×1023 6.022 × 10 23 atoms, molecules, protons, etc. To convert from moles to atoms, multiply the molar amount by Avogadro's number. To convert from atoms to moles, divide the atom amount by Avogadro's number (or multiply by its reciprocal).

c, liquids evaporate, creating a gas

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.