Is a compound considered a pure substance? Why or why not?

How many moles are equal to 9.03x10 24 atoms of mercury

Which statement describes the law of conservation of energy? All systems will exchange matter and energy with their surroundings. All systems can exchange energy, but not matter, with their surroundings.

Find the molar mass of each gas measured at the specified conditions. a) 3.48 g of gas occupying 1.52 L at 265 K and 1.63 atm. Answer in units of g/mol.

What is the new volume of a gas at standard pressure (760 mm Hg) if originally 2.30 L of the gas had a pressure of 725.0 mmHg?

A young child has a mass of 40 kg. What the of the child grans

A baker touches a pie right after taking it out that of me which statement best explains why the pie feels hot

A scientist discovers a new type of polymer. What must be true about this polymer? A. It contains carbon atoms arranged in a ring structure. B. It has double bonds between all the carbon atoms. C. It contains molecules of many different types. D.

A line in the lyman series of hydrogen has a wavelength of 122 nm. from what state did the electron originate?

What are the products of photosynthesis? A. Glucose and oxygen B. Oxygen, solar energy, and glucose C. Carbon dioxide, water, and solar energy D. Hydrogen, oxygen, and carbon

A sample of a substance that has a density of 0.824 g/mL has a mass of 0.421 g. Calculate the volume of the sample.