The following data was collected during a laboratory research. The room temperature to the laboratory was 30 degrees celsius. A substance that appeared to be white, soft, and powdery was mixed with a transparent liquidy substance that was oderless. As the two substances were mixed in a beaker. a white airy foam began to rise from the surfae of the liquid. The temperature of the mixed substance is measured at 37 degrees celsius. Identify each observation is described in the senario. Identify it if its physical property, physical change, chemical property, or chemical change airy foam - white substance - powdery substance - temperature increase - liquidy substance - tranparent - soft powdery - odorless when miixed- Solubuity - mixture remained oderless - airy foam - white substance - powdery substance- temperature increase - liquidy substance - tranparent - soft powdery - odorless when miixed - Solubuity - mixture remained oderless-

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.

Which other elements contain the same number of outer electrons as sodium

What is the percent composition of ca(oh)2? 37.7% ca, 53.0% o, and 10.3% h 45.5% ca, 38.2% o, and 16.3% h 54.0% ca, 43.0% o, and 2.7% h 64.7% ca, 27.0% o, and 8.3% h