Straighterline Chemistry Final Exam

STRAIGHTERLINE CHEMISTRY FINAL EXAM 2024-2025 QUESTIONS AND CORRECT VERIFIED ANSWERS /100% PASS SOLUTION / ALREADY GRADED A+ What is the vapor pressure above a beaker containing a solution of NaCl that is made up of 250ml of water and 12g of NaCl? a. 10.3 mmHg b. 23.4 mmHg c. 35.8 mmHg d. 63.2 mmHg - ANSWER--b. 23.4 mmHg Plants use up copious amounts of which alkali metal, preventing most of it from being washed out to sea? a. lithium b. sodium c. potassium d. rubidium - ANSWER--c. potassium Which of the following isotopes is likely to be the most stable? Select one: a. F-21 b. Kr-77 c. Po-210 d. Sn-50 - ANSWER--d. Sn-50 Ernest Rutherford disproved J.J. Thomson's plum-pudding model of the atom by showing that a. atoms are, in fact, not electrically neutral b. . b. the atom contains neutrons. c. positive matter is concentrated in the central core.d. electrons are actually greater in mass than protons. - ANSWER--c. positive matter is concentrated in the central core. What is the reducing agent in the following equation? Mg(s) + 2 HCl(aq) --> MgCl2(aq) + H2(g) a. Mg b. HCl c. H2 d. MgCl2 - ANSWER--A. Mg What is the mass