Uma solução do ácido perclórico (HCIO) foi preparada com 0,1 mol em 500 mL de solução. Calcule a concentração de quantidade de matéria. Obs:Desenvolva a questão;não precisa fazer a conta.

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?

What is the value of the standard enthalpy of formation of an element in its most stable form?

Polar bears give birth and hunt on sea ice. which of the following would polar bears survive during the melting of arctic ice? growing another layer of fur during summer migrate inland to search for different food sources staying put until the ice refreezes sticking to the usual diet of seals