Which of the following is true for combustion reactions?

Energy is absorbed.

Energy is released.

Hydrogen is a reactant.

Nitrogen is a reactant.

What is the volume of 0.120 g of C2H2F4 vapor at 0.970 atm and 22.4°C? Answer in units of L.

Does Biuret test work for most proteins, if not which ones and why?

Scientists publish a revised list of dangerous greenhouse gases. Which statements describe the importance of this information? Check all that apply. It confirms the need for oil fracking to produce energy.

What can you conclude about the relative magnitudes of the absolute values of ΔHsoluteΔHsolute and ΔHhydrationΔHhydration, where ΔHsoluteΔHsolute is the heat associated with separating the solute particles and ΔHhydrationΔHhydration is the heat

Why does an egg change color and texture when heated?

Find the parent acid and parent base of al2 (co33, determine if they are strong or weak, and determine if the salt is acidic, basic, neutral, or unpredictable.

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure. A second syringe contains 473 mL of N2 at 298 K and 2.6 atm. What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at 0.00°C?

Which pair of elements can form an ionic compound? A) Two atoms of hydrogen B) One atom of sodium and one atom of fluorine C) One atom of calcium and one atom of chlorine D) Two atoms of hydrogen and one atom of oxygen

Two members of the Boron family owe their names to bright lines in their emission spectra. Indium has a bright indigo blue line (451.1nm) and Thallium has a bright green line (535.0 nm). What are the energies of these two spectra lines?

Whats the answer to 7/2 * 1/5?