The Mohs scale measures A. density of a mineral. B. a mineral's hardness. C. the luster of a mineral. D. a mineral's type of crystalline structure

An organism that died millions of years ago in a swamp would most likely become what type of resource? a. petroleum b. coal c. natural gas d. uranium

If the pressure, volume, and the number of moles of a gas are known, which is needed to calculate the universal gas constant from the ideal gas law?

Which of the following is true about compounds? 1) They can be physically separated into their component elements. 2) They have properties similar to those of their component elements. 3) They have compositions that vary. 4) They are substances.

Between magnesium and calcium, which has the highest ionization energy, and why?

Which type of cell is E. coli? A. bacteria B. rod-shaped C. prokaryotic D. eukaryotic

How does heat transfer takes place between any two systems?

Hydrate name of CaCl2 * 8 H2O

Calculate the heat evolved from a mixture of 14.1 l of sulfure dioxide

Which stament best describes a solution

Which answer accurately describes the difference between speed and velocity? Read each answer choice carefully. Question 4 options: A. If speed is constant, then velocity is also constant. B. Speed requires direction.