A) Tính nồng độ % của dd khi cho 20g KCl tan trong 600g dd b)Tính nồng độ mol của dd khi cho 160g dd CuSO4 tan trong 2 lít dd
c)Tính nồng độ phần trăm của dd thu được khi hòa tan hoàn toàn 12,4g Na2O trong 187,6g nước

Construct the hypothetical phase diagram for metals a and b between room temperature (20c) and 700c, given the following information: * the melting temperature of metal a is 480c. • the maximum solubility of b in a is 4 wt% b, which occurs at 420c. • the solubility of b in a at room temperature is 0 wt% b. • one eutectic occurs at 420c and 18 wt% b–82 wt% a. • a second eutectic occurs at 475c and 42 wt% b–58 wt% a. • the intermetallic compound ab exists at a composition of 30 wt% b–70 wt% a, and melts congruently at 525c.• the melting temperature of metal b is 600c. • the maximum solubility of a in b is 13 wt% a, which occurs at 475c. • the solubility of a in b at room temperature is 3 wt% a.

Based on its chemical properties, identify the position of each chemical family on the periodic table.

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?