Is iron a substance or mixture?

When you add an acid to a buffer how does the buffer maintain the ph of the solution?

Which of the following atoms contains the same number of neutrons as an atom of Fluorine-19? Neon-20<? Oxygen-19 Sodium-22 Nitrogen-16

A spherical ball of lead has a diameter of 2.5 cm. What is the mass of the sphere if lead has a density of 11.34 g/cm3? (The volume of a sphere is (43) πr3 where r is the radius.)

What is the role of shrimp with respect to salmon in him food chain A. Predator B. Prey C. Parasite D. Host

When nh4clo4 (s) decomposes thermally, the products of the reaction are n2 (g), o2 (g), h2o (g), and hcl (g). write the balanced equation (including phases) for this reaction?

A very small equilibrium constant means ... a. an equal amount of reactants and products c. more products b. more reactants d. system isn't at equilibrium

What is in a banana? give me specifics?!

When 17.28 mL of a 0.078 M aqueous solution of Na2SO4 is combined with 11.30 mL of a 0.20 M aqueous solution of NaCl and 7.84 mL of a 0.26 M aqueous solution of KCl, what is the total concentration of Na + in the combined solution?

What mass of carbon can 3000 J of energy raise from 12°C to 40°C?

How do you balance __Mg + __HCl - - > __MgCl2 + ___ H2