4. Hòa tan hoàn toàn 45,2 gam hỗn hợp X gồm Ag, Cu vào dung dịch HNO3 đặc thu được 3,36 lít khí NO và V1 lít khí NO2. Biết phản ứng chỉ tạo ra 2 sản phẩm khử trên và các thể tích khí đo ở đktc. Giá trị của V1 là:

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

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

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.