Why are gas bubbles not always a sign of a chemical change?

What is the name given to the tiny clump of positive material at an atom's center

Write a balanced equation for the combustion of hexane, C6H14 (l)

A 45 L container holds 28 moles of gas at a temperature of 215 K. What is the pressure in atmospheres inside the container?

How can you tell if an atom has a negative charge?

When aluminum, Al, metal is dipped in an aqueous solution of hydrochloric acid, HCl, hydrogen gas, H2, is produced with the formation of an aluminum chloride, AlCl3, solution.

O2 + CS2 → CO2 + SO2 Which of the following shows the equation balanced?

Convert 970. mm Hg to atm.

The addition of a catalyst in a chemical reaction (A) increases the concentration of products at equilibrium. (B) increases the fraction of reactant molecules with a given kinetic energy.

Is fire hot or cold?

In Flask A, you reacted 7.23 g Mg with 1.05 mol HCl. In Flask B, you reacted 1.22 g Mg with 1.35 mol HCl. Which balloon will inflate the most?