A metal cylinder was immersed in boiling water (100°C) and then quickly transferred to a calorimeter containing cold water. The given information was recorded. mass of the cylinder: 125.00 g initial temperature of the cylinder: 100.00°C final temperature of the cylinder: 32.50°C mass of water in calorimeter: 152.00 g initial temperature of water in calorimeter: 20.00°C final temperature of water in calorimeter: 32.50°C For water; c = 4.19 J/g°C 4. To the nearest hundredth, how many kilojoules of energy were lost by the metal cylinder (and gained by the water)?

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.

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate