In the balanced equation 4Fe + 3O2 = 2Fe2O3 how many atoms of iron (Fe) are reacting with every three molecules of oxygen (O2) ?

A mixture of NO2 and N2O4 gas is at equilibrium in a closed container. These gases react with the equation 2NO2 ⇌ N2O4. What will happen if the size of the container is increased?

Match the term to its description. Gravitational energy Answer 1 Mechanical energy Answer 2 Nuclear energy Answer 3 Thermal energy Answer 4 Internal energy caused by vibrations of atoms and molecules The potential energy of position The energy of an

Molecules consist of two or more atoms held together by

An atom has 5 protons and 7 neutrons. What is its mass number of amu?

Rank the following coffee samples in terms of likely sweetness based on the amount of sugar added. Use 1 to indicate the sweetest coffee and 4 for the least-sweet coffee.

Human muscle stores sugars in the form of

How much heat is needed to raise the temperature of 75 g of a substance by 15 C when the specific heat is 0.92 J/g-C?

A nitric acid solution flows at a constant rate of 5L/min into a large tank that initially held 200L of a 0.5% nitric acid solution. The solution inside the tank is kept well stirred and flows out of the tank at a rate of 10L/min.

How many molecules are in 237g (about a cup of water)

3. A compound was analyzed and found to contain 9.8 g of nitrogen, 0.70 g of hydrogen, and 33.6 g of oxygen. What is the empirical formula of the compound?