Which of the following causes an eclipse?

A) when an object in space comes between the sun and a third object

B) when an object in space comes between the moon and earth

C) when a meteorite hits earth

D) when a large cloud passes over the sun

Consider this equilibrium: HCO31 - + H2PO41 - HPO42 - + H2CO3. What are the Brønsted-Lowry acids in this equilibrium? A. HCO31 - and H2CO3 B. HCO31 - and HPO42- C. H2PO41 - and H2CO3 D. H2PO41 - and HPO41- E. HCO31 - and H2PO41-

Which fossil fuel creates the least amount of pollution when it is burned? A. bituminous coal B. petroleum C. natural gas D. anthracite

When Na and Cl combine to form a compound, which atom (s) will become a cation? View the periodic table A. Na only B. Cl only C. both Na and Cl D. neither Na nor Cl

Consider the given acid ionization constants. identify the strongest conjugate base. acid ka hf (aq) 3.5*10-4 hc7h5o2 (aq) 6.5*10-5 hclo2 (aq) 1.1*10-2 hc2h3o2 (aq) 1.8*10-5 you may want to reference (pages 729 - 731) section 16.

True or False: According to the present atomic theory, the location of an electron in an atom is best represented by a probability cloud.

Why are there so many volcanoes in and around japan

A liquid fuel mixture contains 30.35% hexane (c6h14), 15.85% heptane (c7h16), and the rest octane (c8h18). what maximum mass of carbon dioxide is produced

What is the suns color

A container has a volume of 200 L at 0.94 atm and 25 C. The pressure changes to 1.00 atm and the temperature changes to 0 C. What is the new volume of the container

f litmus paper is dipped in an acidic solution and then in a basic one, what will happen? The paper will turn from blue to red. The paper will turn from red to clear. The paper will turn from blue to clear. The solution will turn from red to blue.