3 moli de magneziu reacţionează cu apa. Calculaţi volumul de hidrogen degajat. 5 moli de calciu reacţionează cu oxigenul. Calculaţi masa şi numărul de moli de oxid de calciu obţinut. Am nevoie de ele rapid

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

did anyone actually do this? like if anyone has submitted this i rly need .