Can two different samples of the same substance have different physical properties? Chemical properties?

Convert to grams 0.100 moles of Co2

If a flask initially contains 2.0 atm of A and 1.9 atm of B, what will be the pressure in the flask if the reaction proceeds to completion? (Assume constant volume and temperature.)

An electromagnetic wave that has a higher frequency than ultraviolet light will have ___ than the ultraviolet light. A. Longer wavelength and higher energy B. longer wavelength and lower energy C. shorter wavelength and higher energy D.

A gas sample occupies 3.50 liters of volume at 20.°c. what volume will this gas occupy at 100.°c (reported to three significant figures?

Changes in state are called phase changes. A phase change is a change from one physical state (gas, liquid, or solid) to another. The amount of energy necessary to melt 1 mole of any solid is called its enthalpy of fusion.

Define "Homoglycan" and "Heteroglycan" and give an example of each

If you have 200 grams of iodine how many atoms do you have?

Sea salt is formed by natural evaporation of ocean water and contains 98% sodium chloride. The remaining 2% are natural minerals such as iron and sulfur. Consider a 84.7-g sample of sea salt.

Which element in group 15 is the strongest metallic character?

Can neptune sustain life?