Why is Co2 a compound but H2 is not a compound

Which of the following is the mass in grams of 4.25 * 10³ mol of N2?

Nitric oxide reacts with chlorine to form nocl. the data refer to 298 k. 2no (g) + cl2 (g) → 2nocl (g) substance: no (g) cl2 (g) nocl (g) ∆h°f (kj/mol) : 90.29 0 51.71 ∆g°f (kj/mol) : 86.60 0 66.07 s° (j/k·mol) : 210.65 223.0 261.

A container filled with 2.46 kg of water underwent a temperature change from 25.24 °C to 27.31 °C. How much heat, measured in kilojoules, did the water absorb?

A rigid tank contains 2.4 kg of helium at determine the volume

The process of cell division that creates sex cells in sexually reproducing organisms is called

Which type of luster gives the mineral the appearance of metal?

Anything that contains only one kind of material?

One mole of propane (c3h8) gas reacts with five moles of oxygen (o2) gas to produce three moles of carbon dioxide gas (co2) and four moles of water gas (h2o).

How many nitrogen molecules are in 1.2 moles of N2?

Which best describes how sediment forms?