how many covalent bonds does a phosphorus atom normally form, based on the number of valence electrons in the atom?

Which of the following instruments is used to measure air pressure? A. Thermometer B. Barometer C. Hygrometer D. Anemometer

The school is 3,000 meters from the mall. What is the distance in kilometers?

n a classroom, which comparison would a teacher most likely use for describing a mole? a cup of water and a liter of oil a dozen eggs and a dozen jellybeans a jar of jellybeans and a gram of salt crystals 20 marbles in a bag and 10 large ice cubes

The pH of a liquid is a measure of how acidic or basic it is. The concentration of hydrogen ions in a liquid is labeled [H^+]. Use the formula pH=-log[H^+] to find the pH level, to the nearest tenth, of a liquid with [H^+].

The genetic material of all organisms; made up of two twisted strands in a double helix

Calculate the moles of new H₂ O₂ using the balanced formula below and the average moles of KMnO₄ from calculation #2. The average moles of KMnO₄ is 0.90mol. 2KMnO₄ + 5H₂O₂ + 3H₂SO₄ → K₂SO₄ + 2MnSO₄ + 8H₂O + 5O₂ Edit: I got 2.

How many grams of CaC2 would make 23.6g C2H2?

Shane performed the following trials in an experiment. Trial 1: Heat 30.0 grams of water at 0 °C to a final temperature of 40.0 °C. Trial 2: Heat 40.0 grams of water at 10.0 °C to a final temperature of 40.0 °C.

According to the law of conservation of ___ in an isolated system the initial total momentum before a collision equals the final total momentum.

What is the correct name fore this formula Al2O3