11. elements on the periodic table are arranged by increasing (4 points) number of neutrons reactivity mass atomic number 12. protons are located (4 points) both in orbit and in the nucleus in the nucleus with electrons in orbit around the nucleus in the nucleus with neutrons 13. which of the following is not true for atoms? (4 points) they are made of protons, neutrons, and electrons. they are the building blocks of matter. they are made up of elements. they contain a nucleus. 14. which of the following is not true for atoms? (4 points) they are the smallest particle of any element. they are able to be divided by a chemical reaction. they are the building blocks of matter. they are made of protons, neutrons, and electrons. 15. cl is highly reactive. you would expect nacl to (4 points) be highly reactive take on some of the properties of cl have similar properties to cl to have completely different properties 16. as you move from left to right across the periodic table, the atomic numbers (4 points) decrease are random stay the same increase 17. an ionic compound is formed when (4 points) a metal bonds with a nonmetal a nonmetal bonds with another nonmetal three nonmetals bond together a metal bonds with another metal

22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na,so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g

Many reactions take place in aqueous solution. when potential reactants are mixed, a reaction will occur if there is some driving force that favors the formation of products. it is often convenient to categorize reactions in terms of these driving forces: precipitate formation, in which an insoluble solid is formed, weak electrolyte formation, as in a neutralization reaction involving water, or transfer of electrons, as in a redox reaction. these reactions can be represented by full molecular equations, which contain all species in the reaction mixture, or by net ionic equations, which show only the species that actually undergo a change. the latter does not contain the spectator ions, which do not undergo a net change or do not take part in the reaction. part a when the following two solutions are mixed: k2co3(aq)+fe(no3)3(aq) the mixture contains the ions listed below. sort these species into spectator ions and ions that react. drag the appropriate items to their respective bins. view available hint(s) spectator ions ions that react part b what is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants? assume that the contribution of protons from h2so4 is near 100 %.ba(oh)2(aq)+h2so4(aq)→ express your answer as a chemical equation. view available hint(s) nothing provide feedback

Astudent completes a titration by adding 12.0 milliliters of naoh(aq) of unknown concentration to 16.0 milliliters of 0.15 m hcl(aq). what is the molar concentration of the naoh(aq)? 1)5.0 m 2)0.20 m 3)0.11 m 4)1.1 m