Science Starters 1/18/2019 Why do Everest climbers often use oxygen?

Science Starters 1/18/2019 Use Boyle's law to describe what would happen to a SCUBA diver if s/he held her/his breath while ascending. Use the words pressure and volume in your explanation.

Science Starters 1/18/2019 Calculate the volume of 1.00 mol of hydrogen gas at zero C and 1.00 atm.

Science Starters 1/18/2019 Would you expect one mole of gas in this classroom to occupy more or less volume than 22.4 L? Justify your answer.

Science Starters 1/18/2019 How many times faster will ammonia (NH3) effuse compared to hydrogen chloride gas (HCl)?

Science Starters 1/18/2019 38) What would a temperature v. time graph look like if you heated frozen H2O ice (starting at -10 C) to superheated steam (at 110 C)? temperature (C) time

Science Starters 1/18/2019 40) If you wanted to make 150. mL of 2.00 M NaOH (aq), how much solid NaOH would you need to measure out?

Science Starters 1/18/2019 40) What would you expect the freezing point of a solution to be if you created it by adding 12.0 g of NaCl to 100.0 mL of water?

Science Starters 41) What is the difference between TEMPERATURE and HEAT? 1/18/2019

Science Starters 1/18/2019 40) How much heat is absorbed by 320 mL of water when its temperature is raised from 20 C to 55 C?

Science Starters 1/18/2019 41) If 100. mL of water in a calorimeter increases 10.0 C when Mg reacts with HCl, then what is the heat of reaction (qrxn)?

Science Starters 1/18/2019 42) Calculate the H for: 2Al + Fe2O3 2Fe + Al2O3 Given that, 2Al + (3/2)O2  Al2O3 H = -1670 kJ 2Fe + (3/2)O2 Fe2O3 H = -824 kJ

Science Starters 1/18/2019 43) Find H for the reaction below: H2(g) + ½ O2(g)  H2O(l)

Science Starters 1/18/2019 44) What is the accepted value for the heat of fusion of ice (water)?

Science Starters 1/18/2019 46) What must be the sign of H and S if a reaction is said to be spontaneous at any temperature?

Science Starters 1/18/2019 47) Define equilibrium.

Science Starters 1/18/2019 48)Calculate the keq for the synthesis of ammonia if the following concentrations are present at equilibrium: N2(g) + 3H2(g) <-> 2NH3(g) [N2] = 3.1 mol/L; [H2] = 5.7mol/L; [NH3] = 6.2 mol/L

Science Starters 1/18/2019 49) What would you do to shift the following equilibrium position as far to the right as possible: N2(g) + 3H2(g) <-> 2NH3(g) + heat

Science Starters 1/18/2019 50) What are some differences between acids and bases?

Science Starters 1/18/2019 51) What is the difference between a concentrated acids and a strong acid (or base)?

Science Starters 1/18/2019 52) What is the pH of a solution with an OH- concentration of 3.4 x 10-6 M?

Science Starters 1/18/2019 53) How much 18.0 M HCl would be required to neutralize 50.0 mL of 9.0 M NaOH?

Science Starters 1/18/2019 54) If you combined 50 mL of acid (pH=3) with 50 mL of base (pH = 8), would the resulting solution be an acid, base or neutral substance.

Science Starters 3Sn2+ + IO3- + 6H+  3Sn4+ + I- + 3H2O 1/18/2019 55) Determine the oxidation states of each species below and name the oxidizing and reducing agents. 3Sn2+ + IO3- + 6H+  3Sn4+ + I- + 3H2O

Science Starters 1/18/2019 56) Balance the equation below and write the balanced half reactions: Mg + Zn(NO3)2  Zn + Mg(NO3)2

Science Starters 1/18/2019 57) What are some of the differences between chemical and nuclear reactions?

Science Starters 1/18/2019 58) When two carbon-12 nuclides inside a star fuse together, they release a proton and a heavier nuclide. Write the nuclear equation for this reaction.

Science Starters 1/18/2019 59) Define half-life. What is the half-life of Carbon-14?

Science Starters 1/18/2019 60) A dinosaur bone is found in the Grand Canyon. A colleague of yours suggests that you measure C-14 in the sample to determine its age. What is your response and why?

Science Starters 1/18/2019 61) Define organic chemistry.

Science Starters Draw the structure for 1,3,5-trimethylbenzene 1/18/2019 Draw the structure for 1,3,5-trimethylbenzene