If a substance cannot be seperated physically or chemically, it is?

Choose the correct explanations for the aromaticity of the compound. Select all that apply. 1. The lone pairs on the nitrogen atoms do not contribute to aromaticity. 2. The lone pairs on the nitrogen atoms do contribute to aromaticity. 3.

A sample of oxygen gas (O2) has a volume of 7.51 L at a temperature of 19°C and a pressure of 1.38 atm. Calculate the moles of O2 molecules present in this gas sample. A. 0.217 mol B. 0.866 mol C. 6.65 mol D. 0.433 mol = n

What are greenhouse gases? a) gases that transmit infrared light b) gases that absorb ultraviolet light c) gases that transmit visible light d) gases that absorb infrared light e) gases that absorb visible light

Why is east Texas shaded green and west Texas shaded brown

A 2.0g sample of SX6 (g) has a volume of 329.5 cm3 at 1.00 atm and 20o C. Identify the element 'X'. Name the compound.

Which one is the odd one and why? - type A blood -type A antibodies -AO genotype -A antigen

What is the expected lifespan of a nuclear reactor?

Shawn wants to buy a pair of gloves online. She needs to know the length of her hand in order to choose the correct size. Which Sl unit would be most appropriate for describing the length of her hand? A. Kilograms B. Milliliters C. Kilometers D.

Knowing the reactions between hydrogen gas and oxygen gas to form water is exothermic which would you say is greater: the average bond energies for hydrogen and oxygen or the bond energies for water? Explain.

Why would a C-O bond have only provide 358 kJ/mol each while C=O provides 799 kJ/mol? Explain in detail.