En qué categoría se clasifican el sodio, potasio, calcio y magnesio

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

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