True or false the first species to colonize newly exposed land are called primary species?

What is the molarity of sodium chloride in solution that is 13.0% by mass sodium chloride and that has a density of 1.10 g/mL?

Which one would be expected to happen? If one of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3).

Which reaction below represents the second ionization of sr? a. sr (g) → sr⁺ (g) + e⁻ b. sr2⁺ (g) + e⁻ → sr⁺ (g) c. sr⁺ (g) + e⁻ → sr (g) d. sr⁻ (g) + e⁻ → sr2⁻ (g) e. sr⁺ (g) → sr2⁺ (g) + e⁻?

Practice entering numbers that include a power of 10 by entering the diameter of a hydrogen atom in its ground state, dH=1.06*10-10m, into the answer box.

What happens to the drops of denatured alcohol after 2 minutes?

A sample of a hydrate has a mass of 5.026 g. After it is heated, it has a mass of 3.492 g. What is the percentage by mass of water in the hydrate? 1. 19.40% 2. 27.92% 3. 30.52% 4. 69.48%

The chemical equation below shows the combustion of methane (CH4). CH4+2O2--CO2+2H2O The molar mass of oxygen gas (O2) is 32.00 g/mol. The molar mass of carbon dioxide (CO2) is 44.01 g/mol. What mass of CO2, in grams, will firm when 8.

Describe the function and usefulness of a model in scientific investigations, using the atomic model as an example.

Which set expresses the following numbers in scientific notation?: seven hundred-millionths, seven hundred million, and seven ten-thousandths.

What is the relationship among voltage, current, and resistance?