For a reaction at equilibrium, which of the following is the best way to think about it?

a. forward rate = reverse rate
b. the concentration of intermediates becomes negligible.
c. the concentration of reactants becomes negligible.
d. the concentration of reactants = concentration of products.
e. the concentration of reactants and products are not related.

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

Rutherford's experiment indicated that matter was not as uniform as it appears what part of his experimental results implied this idea

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.