Which of the following physical properties of stars are plotted on an HR diagram?

Absolute brightness and size

Apparent magnitude and mass

Apparent magnitude and luminosity

Absolute brightness and temperature

What can a drop of mercury be described as?

A reaction with ΔH = - 13 kJ/mol and ΔS = - 22 J/K·mol, at 2°C, the reaction is: A) spontaneous B) nonspontaneous C) at equilibrium D) impossible to determine reactivity E) none of the above

What is the purpose of finding oxidation states in the half-reaction method for balancing equations? to use as coefficients in the final equation to identify the half reactions for the equation to make sure the equation is balanced electrically to

How many valence electrons are in Tc

Which element has the highest (most negative) electron affinity?

List two potential problems with burning garbage.

Mole ratios how can the coefficients in a chemical equation be interpreted. True or False

For taking sip of hot tea, we blow air on it. Justify

The molecules in a solid object A. flow freely around each other B. vibrate slowly C. are completely still all the time

How many moles of water can be obtained from the reaction of 4 moles of O2?