Very unsure on my answers for these 2 questions. i really have no idea what i'm doing. could someone explain? will give medal and maybe become a fan if someone would just me understand! ? 1. which of the following energy yields is likely to have come from a fission or fusion reaction? 1.0 × 10^2 kj/mol 2.5 × 10^2 kj/mol 1.2 × 10^3 kj/mol *this 1.4 × 10^11 kj/mol 2. in a nuclear reaction, a change in mass of 1.0 × 104 g occurs. what is the corresponding change in energy? use the formula e = mc2. 9.0 × 10^3 kj *my best 9.0 × 10^6 kj 9.0 × 10^9 kj 9.0 × 10^12 k

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.

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1: