The surface temperature of main-sequence stars increases as

A. diameter increases.

B. diameter decreases.

C. absolute brightness increases.

D. absolute brightness decreases.

What type of elements make up an ionic compound

Light from the sun transfers solar energy to the earth system. Sunlight travels to earth as

A large crystal of potassium manganate is placed in the bottom of a beaker of cold water, and left for several hours. Describe what would be seen after 5 minutes

How many types of nomenclature in the features of organic chemistry? What are they?

What is the value for º for the following reaction, given the standard entropy values? Al2O3 (s) + 3H2 (g) → 2Al (s) + 3H2O (g) -35 J/mol·K +35 J/mol·/K +179 J/mol·K -179 J/mol·K

The water level in a graduated cylinder stands at 20.0 ml before and at 26.2 ml after a 16.74 g metal sample is lowered into the cylinder. what is the density of the sample. what metal is the sample most likely to be

What are the tube feet on a star fish

What kingdom is humans in!

Propane (C3H8) has a molar mass of 132 g/mole. You started out the day with a tank containing 9071 g of propane. At the end of the day, your tank contained 7532 g of propane gas. How many moles of gas did you use?

Why decomposition of ammonium nitrate is a redox reaction?