The balance of nature depends on the food chain. true or False

The table below gives information about the nucleus of each 4 atoms Atom Number of protons Number of neutrons A 6 6 D 6 7 G 7 7 E 7 8 How many different elements are represented by the nuclei in the table? A 1 B 2 C 3 D 4

Which statement best describes how chemical equations demonstrate conservation of mass

A 360 - mL can of soda pop contains 47 g of sucrose (C12H22O11). What is the molarity of the solution with respect to sucrose?

A particular reactant decomposes with a half-life of 113 s when its initial concentration is 0.372 M. The same reactant decomposes with a half-life of 223 s when its initial concentration is 0.189 M.

Why are some compounds that contain carbon not considered as organic compounds?

What is an example of making a qualified observation

With respect to composition, how is the compound made from hydrogen and oxygen different from mixtures of these two elements?

How should scientist respond when new evidence that challenges current is presented?

Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium pressure of H2. D2 (g) + H2 (g) ⇌ 2 HD (g) Kp = 1.80 P (D2) eq = 1.1 * 10-3 atm P (HD) eq = 2.7 * 10-3 atm

Find δe for the change in state of 1.0 molh2o (l) at 79 ∘c to h2o (g) at 116 ∘c. the heat capacity of h2o (l) = 75.3 j/molk, heat capacity of h2o (g) = 25.0 j/molk, and the heat of vaporization of h2o is 40.7*103j/mol at 100 ∘c.