Which level of organization describes an oak tree forest with bacteria, fungi, dead leaves, butterflies, blue jays, stones?

A) biome

B) biosphere

C) community

D) ecosystem

What is a solution considered to be if it has a ph lower than 7?

How do I do this? Consider the chemical reaction 2NH3 (g) N2 (g) + 3H2 (g). The equilibrium is to be established in a 1.0-L container at 1000 K, where Kc = 4.0 * 10-2. Initially, 1.22 moles of NH3 (g) are present.

If an isotope decays by the process of beta emission, ___.

Which of the following is not an example of an externality? a. Acidic by-products of fossil fuel combustion that produce acid rain. b. Carbon dioxide from energy generation that adds to the worldwide, long-term greenhouse effect. c.

An example of a disaccharide is saccharin-aspartame molecule True False

A cube has a mass of 100 grams and it's density is determined to be 1g/cm^3. The volume of the cube must be

The oxide of titanium, TiO2 is used as a "whitener" in toothpaste. It is obtained from the ore iron (II) titanate, FeTiO3. What is the change, if any, in the oxidation number (oxidation state) of titanium in the reaction

What happened to the mars Climate Orbiter and why? How much money did NASA lose from this incident?

How many bonds are present in HCI? a) 1 b) 3 c) 4 d) 2

Determine the number of moles 1) 20g Na and 2) 34g H2O