Consider the two beakers labeled A and B. Beaker A contains 1 mole of iron atoms, and Beaker B contains 1 mole of lead atoms. Which statement concerning these samples is known with certainty?

Consider the following precipitation reaction. Which of the following correctly identifies the spectator ions in this reaction? Na 2S( aq) + CuSO 4( aq) → Na 2SO 4( aq) + CuS( s)

Which has the greatest mass, one atom of carbon, one atom of hydrogen, or one atom of lithium?

Diamond is a pure form of the element carbon. If a 2 carat diamond has a mass of 0.396 g, how many carbon atoms are contained in this diamond?

How is the reaction shown below best classified? 2HgO(s) → 2Hg(l) + O 2(g)

What is the mass of 4.00 moles of helium, the gas commonly used to fill party balloons and lighter-than-air ships?

Choose the best classification of the reaction represented by the following equation: 2Fe 3+( aq) + Fe( s) → 3Fe 2+( aq)

Counting the number of moles on both the reactant and product sides of an equation is the first step in balancing the equation.

Which statement best describes the Law of Conservation of Mass?

Cisplatin is a chlorine-containing chemotherapy agent with the formula Pt(NH 3) 2Cl 2. What is the mass of one mole of cisplatin?