Which substances are needed in the smallest amount by a human body?

A balloon is filled with 0.250 mole of air at 35°C. If the volume of the balloon is 6.23 liters, what is the absolute pressure of the air in the balloon?

A student is titrating 50 mL of 0.32 M NH3 with 0.5 M HCl. How much hydrochloric acid must be added to react completely with the ammonia?

Agl+Fe2 (CO3) 3=Fel3+Ag2CO3

List 2 facts that support human-created climate change?

The complete combustion of acetylene, C2H2 (g), produces 1300. kJ of energy per mole of acetylene consumed. How many grams of acetylene must be burned to produce enough heat to raise the temperature of 1.00 gal of water by 12.

What does berkelium react with

Classifying living things

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