Which level of organization includes all the organisms on earth and all the non living things that they interact with?

A) biome

B) biosphere

C) community

D) ecosystem

What is happening to Coral Reefs all over the world

Which of the following is not true regarding an acid? a. can donate a proton (H+) to some other substance b. can accept a proton (H+) from some other substance c. releases hydrogen ions (H+) when dissolved in water d.

What mass of manganese (II) chloride must react with sulfuric acid to release 48.5 mL of hydrogen chloride gas at STP? MnCl2 (s) + H2SO4 (aq) →MnSO4 (aq) + 2HCl (g)

4. Which statement is true about the gravitational force? A. It only acts on objects that are in contact. B. It acts on all objects all of the time. C. It acts just on objects that are moving apart. D.

What is true of a physical change? 1) results in a rearrangement of the elements that make up the substance 2) results in a substance that is still the same substance 3) results in a substance with completely different physical properties 4) results

At a certain temperature, 0.4011 mol of N 2 and 1.501 mol of H 2 are placed in a 3.00 L container. N 2 (g) + 3 H 2 (g) - ⇀ ↽ - 2 NH 3 (g) At equilibrium, 0.1801 mol of N 2 is present. Calculate the equilibrium constant, K c. K c =

How many moles of N are in 0.203 g of N2O?

Given the unbalanced equation: al + cuso4 - - > al2 (so4) 3 + cu. when properly balanced, the sum of the balancing coefficients is select one: a. 7 b. 6 c. 9 d. 8

A particle that has a negative charge is called

Which group of elements will readily lose one electron to meet the octet rule? Alkaline Earth Metals c. Halogens Alkali Metals d. Both A and B