Chemistry concepts and calculations

1. How is the pressure of the vaporized liquid determine? olume of the flask det

1. How is the pressure of the vaporized liquid determine? olume of the flask determined? 3. How is the temperature of the vapor determined? 4. How is the mass of the vapor determi…

1. How is the pressure of the vaporized liquid determine? olume of the flask det

1. How is the pressure of the vaporized liquid determine? olume of the flask determined? 3. How is the temperature of the vapor determined? 4. How is the mass of the vapor determi…

1. How large (in kg) an oxygen candle (KClO3) would be needed to supply 8 people

1. How large (in kg) an oxygen candle (KClO3) would be needed to supply 8 people with enough oxygen for 24 hours on a small submarine. The average person needs .84 kg of O2 per da…

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)4

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)40 bytes d)42 bytes 2. Which of the following is equal to y->id? a)&y->id b)&x.id c)x.…

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)4

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)40 bytes d)42 bytes 2. Which of the following is equal to y->id? a)&y->id b)&x.id c)x.…

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)4

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)40 bytes d)42 bytes 2. Which of the following is equal to y->id? a)&y->id b)&x.id c)x.…

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)4

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)40 bytes d)42 bytes 2. Which of the following is equal to y->id? a)&y->id b)&x.id c)x.…

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)4

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)40 bytes d)42 bytes 2. Which of the following is equal to y->id? a)&y->id b)&x.id c)x.…

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)4

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)40 bytes d)42 bytes 2. Which of the following is equal to y->id? a)&y->id b)&x.id c)x.…

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)4

1. How large is the Person struct on a 32-bit machine? a)36 bytes b)38 bytes c)40 bytes d)42 bytes 2. Which of the following is equal to y->id? a)&y->id b)&x.id c)x.…

1. How long will it take to plate 4.00 g of gold metal onto an object that is be

1. How long will it take to plate 4.00 g of gold metal onto an object that is being electroplated using a 1.00 M Au3+ solution and a current of 3.00 A? 2. Gold plating of eating u…

1. How many ATOMS of carbon are present in 6.55 grams of carbon tetrafluoride ?

1. How many ATOMS of carbon are present in 6.55 grams of carbon tetrafluoride ? atoms of carbon . 2. How many GRAMS of fluorine are present in 1.02×1023molecules of carbon tetrafl…

1. How many ATOMS of carbon are present in 7.09 grams of carbon monxide? _____ a

1. How many ATOMS of carbon are present in 7.09 grams of carbon monxide? _____ atoms of carbon 2.  How many GRAMS of oxygen are present in 4.89×1022 molecules of carbon monoxide ?…

1. How many air molecules are in a 11.5×12.0×10.0 ft room? Assume atmospheric pr

1. How many air molecules are in a 11.5×12.0×10.0 ft room? Assume atmospheric pressure of 1.00 atm, a room temperature of 20.0 C, and ideal behavior. Volume conversion:There are 2…

1. How many air molecules are in a 15.0×12.0×10.0 ft room? Assume atmospheric pr

1. How many air molecules are in a 15.0×12.0×10.0 ft room? Assume atmospheric pressure of 1.00 atm, a room temperature of 20.0 C, and ideal behavior. Volume conversion:There are 2…

1. How many ammino acids are in this peptide? 2. Some proteins are composed prim

1. How many ammino acids are in this peptide? 2. Some proteins are composed primarily of ?-sheets that form themselves into a cylindrical structure called a ?-barrel. The ?-barrel…

1. How many atoms are in 1.00g of tungsten? How many moles is this? 2. How many

1. How many atoms are in 1.00g of tungsten?  How many moles is this? 2. How many atoms are in 1.00 cm3 of lead?  In 1.00 m3 of silicon? 3. A cube of aluminum contains 1.0x1021 ato…

1. How many atoms are there in 2 q of oxygen? 2. Analysis of a mineral compound

1. How many atoms are there in 2 q of oxygen? 2. Analysis of a mineral compound shows it to contain the follow- ing: 38.8 wt. % calcium, 20 wt. % Phosphorus and the rest oxygen. E…

1. How many atoms of gold are there in a 1 cubic inch of gold? The density of go

1. How many atoms of gold are there in a 1 cubic inch of gold? The density of gold is 19.32 g/cm3 and 1 cubic inch = 16.39 cm3. 2. How many molecules of aspirin are there in a 200…

1. How many atoms of gold are there in a 1 cubic inch of gold? The density of go

1. How many atoms of gold are there in a 1 cubic inch of gold? The density of gold is 19.32 g/cm3 and 1 cubic inch = 16.39 cm3. 2. How many molecules of aspirin are there in a 200…

1. How many calories are required to warm 20.4 g of water from80°C to 100.0°C an

1. How many calories are required to warm 20.4 g of water from80°C to 100.0°C and convert it to steam at 100.0°C? Theheat of vaporization of water is 540. cal/g. 2. Compounds of b…

1. How many cobalt atoms in mole ofCo? 2. How many germanium atoms in one mole o

1. How many cobalt atoms in mole ofCo? 2. How many germanium atoms in one mole of Ge? Given that the atomic mass of Ni is 58.69g /mol and that of Sn is 118.71g/mol, answer the fol…

1. How many conversion factors (relationships) are given in the following chemic

1. How many conversion factors (relationships) are given in the following chemical equation? 2 NO(g) + 5 H2(g) 2 NH3(g) + 2 H2O(g) 2 conversion factors 4 conversion factors 5 conv…

1. How many dichlorinated products, including stereoisomers, can be isolated whe

1. How many dichlorinated products, including stereoisomers, can be isolated when (S)-2-chlorobutane reacts with Cl2/h?? 1 2 3 4 5 ------------------------------------------------…

1. How many dissociated H+ ions are there in (3.2x10^-1) L of an aqueous solutio

1. How many dissociated H+ ions are there in (3.2x10^-1) L of an aqueous solution whose pH is 11.55? * Note: your answer is assumed to be reduced to the highest power possible. 2.…

1. How many economic problems are a result of alcohol use and abuse? 2. What sou

1. How many economic problems are a result of alcohol use and abuse? 2. What sources of information on the web could you find that discussed the costs of alcohol use and abuse? Pl…

1. How many electrons in an atom can have quantum numbers n=3 and m s = 1/2 2. A

1. How many electrons in an atom can have quantum numbers n=3 and ms = 1/2 2. A plot of the Maxwell-Boltzmann distribution for two different gases at the same temperature shows th…

1. How many equivalents are in each of the following acids a. HCI b. HSO 2. Dete

1. How many equivalents are in each of the following acids a. HCI b. HSO 2. Determine the Equivalent Weight of each the above acids. a. HCI b. H:504 3. What will be the normality …

1. How many equivalents of Mg2+ are present in a solution that contains 2.50 mol

1. How many equivalents of Mg2+ are present in a solution that contains 2.50 moles of Mg2+? 2. Classify the following electrolytes and write a balanced equation for each of the fo…

1. How many grams are contained in 2.00 mol of neon atoms 2. Calculate the numbe

1. How many grams are contained in 2.00 mol of neon atoms 2. Calculate the number of moles of sulfur represented by 1.81x10 24exponent atoms of sulfur 3. 3.4x10-5exponent moles of…

1. How many grams of H3PO4 is needed to prepare 550mL of a 0.31N solution? (assu

1. How many grams of H3PO4 is needed to prepare 550mL of a 0.31N solution? (assume all H+ enter reaction)                 A.            5.6                 B.            1.9      …

1. How many grams of Na2CO3 (FM 105.99) should be mixed with 4.64 g of NaHCO3 (F

1. How many grams of Na2CO3 (FM 105.99) should be mixed with 4.64 g of NaHCO3 (FM 84.01) to produce 100. mL of buffer with pH 10.04? (Assume Kw = 1.011014 and Kaof NaHCO3 = 4.6910…

1. How many grams of NaNO3 would you add to 500 g of H2O in order to prepare a s

1. How many grams of NaNO3 would you add to 500 g of H2O in order to prepare a solution that is 0.500 molal in NaNO3 2. Calculate the freezing point of a solution containing 1.25 …

1. How many grams of calcium Chloride would be requird to be added to 500.0 gram

1. How many grams of calcium Chloride would be requird to be added to 500.0 grams of water to ensure the freezing point would be -2.5 degrees C? Given Kfim = T 2. iff 222.8 grams …

1. How many grams of dry NH4Cl need to be added to 1.50 L of a 0.200 M solution

1. How many grams of dry NH4Cl need to be added to 1.50 L of a 0.200 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.60? Kb for ammonia is 1.8e-5 2 Par…

1. How many grams of ethylene glycol, C2H4(OH)2, are needed per kilogram of wate

1. How many grams of ethylene glycol, C2H4(OH)2, are needed per kilogram of water to protect radiator fluid against freezing down to -10°C? 2. For benzene, C6H6, the freezing poin…

1. How many grams of mercury (II) chloride can be prepared from 30.24 g of mercu

1. How many grams of mercury (II) chloride can be prepared from 30.24 g of mercury for the equations below? a.) Hg(l) + 2H2S04 (aq) -----> HgSO4 (s) + @H2O (g) + SO2 (g) b.) Hg…

1. How many grams of potassium permanganate are needed to completely oxidize 2g

1. How many grams of potassium permanganate are needed to completely oxidize 2g of chlorotoluene? 2. Show correctly balanced oxidation reduction equation for this reaction. Balanc…

1. How many grams of sodium fluoride should be added to 500.mL of a .02M hydrofl

1. How many grams of sodium fluoride should be added to 500.mL of a .02M hydrofluoric acid solution to create a buffer of pH = 3.16?Assume the change in volume is negligible. Ka =…

1. How many grams of solid potassium cyanide should be added to 0.500 L of a 0.1

1. How many grams of solid potassium cyanide should be added to 0.500 L of a0.134 M hydrocyanic acid solution to prepare a buffer with a pH of 8.530 ? grams potassium cyanide = __…

1. How many mL of 0.100 M NaOH are required to neutralize 25.0 mL of 0.15 M H3PO

1. How many mL of 0.100 M NaOH are required to neutralize 25.0 mL of 0.15 M H3PO4? Write th balance acid base neutalization reaction to start. 2. Toxic chromate can be precipitate…

1. How many mL of 0.200 M potassium hydroxide are required to deliver 0.045 mol.

1. How many mL of 0.200 M potassium hydroxide are required to deliver 0.045 mol. 2. What is the final concentration of a solution prepared by diluting 6.00 mL of a 2.24 M solution…

1. How many mL of 0.644 M HBr are needed to dissolve 6.76 g of CaCO3? 2.Calculat

1. How many mL of 0.644 M HBr are needed to dissolve 6.76 g of CaCO3? 2.Calculate the number of milliliters of 0.505 M Ba(OH)2 required to precipitate all of the Cu2+ ions in 179 …

1. How many mL of a 2.0 M solution of NaOH would bve needed in order to have 0.5

1. How many mL of a 2.0 M solution of NaOH would bve needed in order to have 0.500 mol of NaOH? (Molar mass of NaOH is 40.0 g/mol) 2. How many mL of a 45.0% (m/v) solution of NaCl…

1. How many mL of a 22.5% (v/v) ethanol solution would you need to measure out i

1. How many mL of a 22.5% (v/v) ethanol solution would you need to measure out in order to have 12.5 mL of ethanol? (Molar mass of ethanol is 46.07 g/mol) 2. How many grams of NaO…

1. How many milliliters of 2.0 M solution can be prepared from 28 grams of NaOH?

1.   How many milliliters of 2.0 M solution can be prepared from 28 grams of NaOH? 2.  If 55.0 grams of NaCl and 250.0 grams of water are added together calculate the percent solu…

1. How many ml of 1.0 molar HNO3 will neutralize 0.237g of Mg (OH) 2? show work

1. How many ml of 1.0 molar HNO3 will neutralize 0.237g of Mg (OH) 2? show work please A.8.1 B.16.1 C.4.1 D6.2 2. What mass of AgCl forms from the reaction of excess AgNo3 with 50…

1. How many moles are in 9.6 mL of acetic anhydride, density of 1.082? Give two

1. How many moles are in 9.6 mL of acetic anhydride, density of 1.082? Give two significant figures. Given molecular weight: 102 g 2. As a "rule of thumb" there are 20 drops of a …

1. How many moles are present in 20 g of glucose (MW = 180.2)? 2. How many grams

1. How many moles are present in 20 g of glucose (MW = 180.2)? 2. How many grams of NaCl are required to make 1 liter of a 15 % (w/v) solution? 3. What is the molar concentration …

1. How many moles of BaCl2 are needed to make 50mL of a 0.14M solution of BaCk2?

1. How many moles of BaCl2 are needed to make 50mL of a 0.14M solution of BaCk2? a) 2.80 mol b) 0.007 mol 0.104 mol d) 0.07 mol e) 7.0 mol 2. Determine which compound is a salt CH…