How many grams of H2 are needed to produce 12.50g of NH3?

Calcium has an atomic number of 20 and 2 valence electrons. Oxygen has an atomic number of 8 and 6 valence electrons. Neon has an atomic number of 10 and 8 valence electrons.

An iceberg has a volume of 9470 ft3. What is the mass in kilograms of the iceberg? The density of ice in the iceberg is 0.92 g/cm3.

N2 (g) + 3H2 (g) - - >2 NH3 (g) The equation above is the equation for the Haber process. In a certain reaction, you start with 3.0 moles of nitrogen and 5.0 moles of hydrogen, which is the excess reactant?

Explain the difference between a Type I significance error and a Type Il significance error.

The volume of a sample of hydrogen is 771.8 mL and it exerts 638.7 mm Hg pressure at 6.5 ºC. What volume does it occupy at standard temperature and pressure? Select one: a. 653 b. 2.73e4 c. 664 d. 861

What is the change in heat energy when 132g of copper at 32.2°C is raised to 45.0oC? The specific heat of copper is 0.385 J/g °C.

Polar covalent bonds are formed when the electrons in the bond are not shared equally between the two nuclei. which one of these molecules contains polar bonds?

The flame from my candle gives off black smoke heat and light what type of changes do these indicate

Which one of the following processes results in a decrease in the number of neutrons? corrosion electron capture gamma emission positron emission alpha emission

Calculate the root mean square velocity of F2, Cl2, and Br2 at 304 K.