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.

Which element is least likely to undergo a chemical reaction

What is the mass of oxygen gas is consumed in a reaction that produces 4.60mol so2

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt