Cho hỗn hợp gồm 2 oxit, Na2O và FeO có khối lượng là 19,2 gam vào nước sau phản ứng thu được 1 dung dịch chứa 8 gam NaOH và 1 chất rắn a) tính khối lượng chất rắn
b) tính phần trăm theo khối lượng mỗi oxit hỗn hợp

Consider three unlabeled bottles, each contain small pieces of one of the following metals. - magnesium - sodium - silver the following reagents are used for identifying the metals. - pure water - a solution of 1.0 molar hcl - a solution of concentrated hno3 (a) which metal can be easily identified because it is much softer than the other two? describe a chemical test that distinguishes this metal from the other two, using only one of the reagents above. write a balanced chemical equation for the reaction that occurs. (b) one of the other two metals reacts readily with the hcl solution. identify the metal and write the balanced chemical equation for the reaction that occurs when this metal is added to the hcl solution. use the table of standard reduction potentials (attached) to account for the fact that this metal reacts with hcl while the other does not. (c) the one remaining metal reacts with the concentrated hno3 solution. write a balanced chemical equation for the reaction that occurs. (d) the solution obtained in (c) is diluted and a few drops of 1 m hcl is added. describe what would be observed. write a balanced chemical equation for the reaction that occurs.

Type the letter that represents the correct location for each particle type below.

Drug abuse will not lead to physical and psychological dependence. true or false ?