How many chromium atoms are in 3.56 x 10^-21 moles of potassium chromate?

21.44× 10² atoms

Explanation:

Number of chromium atoms = ?

Moles of potassium chromate = 3.56 × 10⁻²¹ mol

Solution:

1 mole of K₂CrO₄ contain 1 mole of Cr.

3.56 × 10⁻²¹ moles of K₂CrO₄ contain 3.56 × 10⁻²¹  moles of Cr.

Number of atoms of Cr:

1 mole contain 6.022× 10²³ atoms

3.56 × 10⁻²¹ mole ×  6.022× 10²³ atoms / 1mol

21.44× 10² atoms or 2144 atoms

la respuesta es si te gusta hacer lo que siempre haces cuando nunca ves a alguien en el espejo porque sabes que no siempre están ahí.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.