Description Coal is mined worldwide for use mainly at power plants to generate electricity. Discuss why coal in a crushed, granulated, or pulverized form spontaneously combusts? In addition, what health effects are associated with coal dust?Another form of carbon is activated carbon. Discuss what activated carbon is, and provide at least two of its industrial or medical applications.
Description So basically all I need you is to fill in the last 2 pages, please? :) file:///Users/shiragoldberger/Library/Containers/com.apple.mail/Data/Library/Mail%20Downloads/chemistry%20lab.pdf
Description What is the solubility product expression for Sn(IO3)2? Select one: a. Ksp = [Sn2+][IO3–]2 b. Ksp = [Sn4+][2IO32–]2 c. Ksp = [Sn2+][2IO3–] d. Ksp = [Sn4+][IO32–]2
Description Which of the following salts has the highest molar solubility in water? Select one: a. BaCrO4 (Ksp = 1.2 x 10–10) b. PbS (Ksp = 2.5 x 10–27) c. BaSO4 (Ksp = 1.1 x 10–10) d. SrCO3 (Ksp = 9.3 x 10–10
Description A 32.5 g Iron rod, initially at 22.7 degree C, is submerged into an unknown mass of water at 63.2 degree C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 59.5 degree C. What is the mass of the water?
Description 1 an atom of rubidium formsa monatomic ion, which of the following ions does it most likely form Rb2- Rb- Rb2+ Rb+ 2 on the basis of elecrtonegatvity which of these pairs of elements is most likely to form monoatomic ions O and F Ba and O Cs and Rb Na and K 3 which of the following pairs of elements would most likely combine to form a salt Ca and C Mg and Cl In and Fe Ne and F 4 on the basis of bonding which of the following compounds has the highest boiling point sodium chloride glucose water alcohol 5 which of the following substances BEST conducts electricity in an aqueous solution CH3OH H2O CO2 KCI 6 on the basis of chemical structure which of the following solids will most easily conduct electricity FeO2 Cu NaCl CaF2 7 which of the following is a monatomic atom NH4+ Fr+ SO4^2- F- 8 which of the following is true about NH4+ it is a ployatomic caiton because it has more than one atom and a negative charge it is a polyatomic caiton because it has more than one atom and a positive charge it is a polyatmic anion because it has more than one atom and a negative charge it is a polyatomic anion because it has more than one atom and a positive charge 9 which BEST describes C2O4^2- 10 for the hypothcheticasl compound AX3- which of the following statements is true A is a metal from group 3A and X is a nonmetal from group 7A A is a metal from group3A and X is a nonmetal from group5A A is a metal from group 1A and X is a metal from group 7A A is a nonmetal from group 3A and X is a metal from group 1A
Description 11 the ionization energies (Kl/mol) of hydrogen, nitrogen, sodium and oxygen are 1,3,1,2 1,4,402,1,681,and 1,314, respectively. Which element combination is LEAST likely NO3- NH4+ OH- NaO- 12 which of the following is a bond in which a metal transfers one or more electrons to a nonmetal covalent bond metallic bond hydrogen bond ionic bond 13 which of the following statements BEST expalins why a salt soulution conducts electricity the salt crystals remain intact and form bridges by which electric charges move the ions move freely in water and carry electric charges the ions move freely in water but lose their charges the salt cyrstals dissolve and form bridges by which electric charges move 14 which of the following is the CORRECT name for a compound with two copper atoms and one oxygen atom copper (2) oxide copper (1) oxide copper(ll)oxide copper (l)oxide 15 in a piece of silver where would you find the valence electrons attracted to a cation shared between a caiton and anion moving freely between the cations attached to an anion 16 which of the following BEST describes bronze a mineral one containing copper and tin a copper-tin alloy an ionic compound of copper and tin a pure metal 17 in which of the following substances does sharing of electrons between two atoms occur Nal He PO4^3- Ag 18 electrostatic forces hold which of the following together K+ and Br- in KBr oxygen and hydrogenatoms in OH- Cu atoms and localized electrons in copper He atoms in helium gas 19 a salt forms in the reaction of aluminum with chlorine what is the most likely formula unit of this salt AlCl3 AlCl2 AlCl Al3Cl 20 which of the following would have a electrostaic force of attraction between them Cs+ and Li+ Na+ and Ar Cl- and O^2- Fr+ and p^3-
Description Calculate the number of moles of NaHCO3 that reacted in each beaker. (The molar ratio between evolved CO2 and the bicarbonate, HCO3-, is 1:1) Note: I used 3g of Alka Seltzer, Initial Mass was(Vinegar+water+alka selt) 118.021g, Final Mass is 117.138g, Mass of Co2 evolved was 0.883g, moles of CO2 evolved was 0.02006g/moles
Description 25.000 mL of H2SO4 was titrated with 0.150 M KOH. The end point was reached when 31.56 mL of KOH was added. Calculate the concentration of the H2SO4.
Description 11 which of the following groups contains mostly radioactive elements inner transition metals alakline earth metals halogens nonmetals 12 what type of element is neon allkaline earth metal halogen noble gas inner transition metal 13 which of the following is the most specific classification for the element europium actinide-series element transistion metal lanthanide-series element inner transistion metal 14 which of the following tend to form anions when bonding with other elements? nonmetals alkali metals noble gases alakine earth metals 15 which of the following nonmetals can conduct electricity well? bromine sulfur iodine carbon 16 which of the following elements belongs on the d block of the periodic table? alkali metals hallogens noble gases transistion metals 17 which of the following elements belongs to the p block cobalt rubidium hydrogen oxygen 18 how many valence electrons are found in iodine 7 8 5 3 19 alliumium has 3 valence electrons and a total of 3 subshells in which group and period is alliumium located group3A,period 3 group 3Bperiod6 group 1A period 1 group6A period 3 20 which group has 8 valence electrons nobles gas halogens alkaline earth metals alkali metals
