Eu tenho a planta, e eu tenho a seda, o que mais eu devo colocar para formar o beck em si?

Seawater contains approximately 3.5%nacl by mass and has a density of 1.02 g/ml. what volume of seawater contains 7.5 g of sodium?

Acylinder is filled with 2.00 moles of nitrogen, 3.00 moles of argon and 5.00 moles of helium. if the gas mixture is at stp, what is the partial pressure of the argon

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh