Sulfur has an atomic number of 16. what would be the valence number of this element?

Determine the amount of energy (heat) in joules required to raise the temperature of 5 kg of iron from 50°C to 200°C.

A gas has a volume of 80.0mL at a temperature of 293°C and 101.3kPa of pressure. What is the volume of the sample when the temperature changes to 586.0 K and the pressure to 50.65 kPa?

The concentration of sodium ions is greater outside the axon than inside the axon during the resting potential. Why is that the case?

A mixture of xenon and carbon dioxide gases is maintained in a 5.33 l flask at a pressure of 2.20 atm and a temperature of 67 c. if the gas mixture contains 19.3 grams of xenon the number of grams of carbon dioxide in the mixture is

A cube of plastic 1.2x10^-5 km on a side has a mass of 1.1 g. what is its density in g/cm^3

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