Question

how to make 9cm square by using: (a+b+c)²=a²+b²+c²+2ab+2bc+2ac (using paper cutouts​

Answer 1

Step-by-step explanation:

In an experiment, 3.672 g of copper oxide gave, on reduction, 2.938 g of copper. What is mass of oxygen formed? What is the ratio of masses of copper and oxygen? (A) 0.634 g. 4:1 (B) 0.534 g 1:4 (C) 0.734 g 4:1 (D) 0.934 g 1:4