If hydrogen gas and oxygen react with enough of heat they produce steam. a. Write the equation and balance if needed. b. If you have 250 g of steam, how many grams of hydrogen and oxygen were needed to react to produce this amount of steam?

What does the mass of 0.7891 mol of ferric oxide (fe2o3)

Comparing john newland’s octaves with the modern periodic table, which 5 elements have been discovered between hydrogen and iron since newland’s time?

Boron has an average atomic mass of 10.81. one isotope of boron has a mass of 10.012938 and a relative abundance of 19.80 percent . the other isotope has a relative abundance of 80.20 percent what is the mass of that isotope? report two decimal places