Calculate the mass in grams

5.0 moles of carbon

Which statement is true if the hrxn of a reaction is positive

Which atom in the ground state requires the least amount of energy to remove its valence electron? (1) lithium atom (2) potassium atom (3) rubidium atom (4) sodium atom

What particle is the only one that determine the type of element you have

Which class of compounds does ammonia blog

Which of the following statements correctly describes the melting process? It is exothermic because heat is gained from the surroundings. It is endothermic because heat is lost to the surroundings.

Why is it incorrect to balance a chemical equation by changing the subscripts?

A solution of CuSO4 is labelled 0.01 M. How much CuSO4 in grams, must be used to make 1 liter of solution? A) 1.120 g B) 1.595 g C) 1.6 g D) 15.0 g

Rank the following elements according to their ionization energy: tin krypton antimony arsenic

Water (3030 g) is heated until it just begins to boil. If the water absorbs 5.49*105 J of heat in the process, what was the initial temperature of the water?

Identify the number of core and valence electrons for each atom. Xe : core electrons Xe : valence electrons Ca : core electrons Ca : valence electrons Br : core electrons Br : valence electrons