Chemistry, 26.05.2021 20:20, smartgirl9989
Magnesium burns in air to produce magnesium oxide. If a sample of
magnesium requires 15.0 g of oxygen to burn completely and forms 37.8 g
of magnesium oxide, what will be the mass of the sample of magnesium?
Explain why this number is important for the Law of of Conservation of
Mass. *
Answers: 2
Chemistry, 22.06.2019 18:00, kyllow5644
Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.
Answers: 3
Magnesium burns in air to produce magnesium oxide. If a sample of
magnesium requires 15.0 g of oxyg...
Mathematics, 01.07.2020 22:01
Mathematics, 01.07.2020 22:01