The benzene ring is the simplest member of

what class of organic compounds?

Compute the end-to-end separation (direct distance between molecule ends), in Angstroms, of a coiled PVC molecule with a number-average molecular weight of 256,131 g/mol, given that the tetrahedral bond angle is 109.

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

Select the correct Answers. What happens when carbon dloxide at 74 C is placed in thermal contact with water at 14°C? 1. Energy leaves the carbon dioxide and enters the water 2. The water gets hotter than the carbon dioxide. 3.

Explain what an acid, a base and an alkali are.

There is approximately 15 milliliters (mL) in 1 tablespoon (tbsp) ? Which expression can be used to find the approximate number of of milliliters in 3 tbsp?

Potassium-40 (40k) is a radioactive isotope of potassium (atomic number 19). how many neutrons are located in the nucleus of potassium-40?

Why do alligators need a warm climate? A. They need to live in a place with enough food. B. They cannot produce enough heat to keep their bodies warm. C. They have scales rather than hair, which keeps them too hot. D.

What human body system can be fossilized? Explain

A reaction mixture initially contains 22.02 g Fe2O3 and 14.66 g CO. Assume that the reaction will progress to 100% completion. What mass (in g) of the excess reactant is leftover?

A cylinder at left with balls evenly spaced throughout the cylinder has an arrow leading to a cylinder at right cylinder with balls in a layer at its bottom. Which change of state is shown in the model?