What is the number of electrons shared between the carbon atoms in a molecule of ethane

the vapor pressure of a naqueous solution is found to be 24.9 mmgh at 25C. what is the mole fraction of solute in this solution?

What is the term for the smallest bit into which a chemical substance can be divided and still have the properties of that substance? A) electron B) atom C) molecules D) iron

49 After decaying for 48 hours, l/16 of the original mass of a radioisotope sample remains unchanged. What is the half-life of this radioisotope? (1) 3.0 h (3) 12 h (2) 9.6 h (4) 24 h

A gas tank holds 285 L of propane, C3H8, at 530. mm Hg. What is the volume of the propane at standard pressure? 408.7L 408.7 mm Hg 198.8 mm 198,8

What happens to the temp a ture of a substance while it is changing stae?

Homogeneous mixture definition in chemistry

Explains why heating a liquid affects its viscosity? The molecules move faster at higher temperatures and overcome attractions more easily. The molecules move faster at higher temperatures, and the attractions between them increase.

Which of the following is a correct procedure for the operation of a microscope? A. Use the fine focus knob with the low power lens and use the coarse focus knob with the high power lens. B.

The Chemist has available four different sizes (based on maximum volume) of graduated cylinders. If the Chemist desires to measure 8 mL, which of the following cylinders is the best choice (based on the criteria given in the class handout) ?

How many atoms altogether make up one molecule of glucose