What was the result of collisions between the early Earth and other, smaller protoplanets?

What are a few differences between chemistry and biology? I'm looking for features and examples of both. Will give brainliest.

The equilibrium between hemoglobin and oxyhemoglobin in the blood can be represented by the following reaction. Write the form of the equilibrium constant expression. Hb+O2⇌HbO2 Express your answer in terms of concentrations [Hb], [O2], and [HbO2].

Precious metals and gems are measured in troy weights in the english system: 24 grains = 1 pennyweight (exact) 20 pennyweight = 1 troy ounce (exact) 12 troy ounces = 1 troy pound (exact) 1 grain = 0.0648 g 1 carat = 0.200 g a.

For the reaction 2NOBr (g) ↔ 2NO (g) + Br2 (g), when the concentrations are [NOBr] = 0.10 m, [NO] = 0.010 M, and [Br2] = 0.0050 M, what is the equilibrium constant of this reaction? A. 5.0 * 10-5 M B. 0.000005 M C. 5.0 * 105 M D. 5.0 M E.

Calculate the amount of heat needed to melt 91.5g of solid benzene (C6H6) and bring it to a temperature of 60.6°C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol

A living thing that cannot make its own food and must eat other living things for energy

Which best explains why astronauts appear weightless when they are in a space shuttle orbiting Earth? • They are falling toward Earth at the same rate as the space shuttle.

If increase the amplitude how does the velocity change? (No google)

What is the result of multiplying (2.5 * 1010) * (3.5 * 10-7) ? Use the correct number of significant digits.

What is 0.002353 to two significant figures