Chemistry concepts and calculations

a)You have an aqueous solution of a weak monoprotic base with a volume of 300 mL

a)You have an aqueous solution of a weak monoprotic base with a volume of 300 mL and a molarity of 0.150 M. you add to it 0.075 moles of its weak conjugate acid. You then add 6.00…

a)____Cr 2 (CO 3 ) 3 +heat---> b)____NaNO 3 +____K 2 SO 4 ---> c)____Ni +_____HC

a)____Cr2(CO3)3+heat---> b)____NaNO3+____K2SO4---> c)____Ni +_____HCl----> d)____H2O+___P2O5----> e)____Zn+_____O2 ----> f)____Ag +_____ZnSO4 ----> g)____ SrO+__…

a)using VSEPR, predict the molecular geomometry of water, H2O and H3O+. Predict

a)using VSEPR, predict the molecular geomometry of water, H2O and H3O+. Predict the bond angles of both molecules. b) how does hybridization change from H2O-->H3O+ ? c) what ar…

a)what is the absorptivity coefficient (molar absorptivity) of {Fe (H2o)5 SCN} 2

a)what is the absorptivity coefficient (molar absorptivity) of {Fe (H2o)5 SCN} 2+ b) what is the [{Fe (H2o)5 SCN}2+]eq c) what are the [{Fe (h2o)6 }3+](aq) & the [SCN-(aq)]eq …

a)when this cell is operating, the, ____ (Ag or Co) electrode will become the ca

a)when this cell is operating, the, ____ (Ag or Co) electrode will become the cathode. b) electrons will flow from the ______ (Ag or Co) electrode c) the _____ (Ag or Co) will exp…

a)write a chemical equation for the reaction of this acid with water. Identify t

a)write a chemical equation for the reaction of this acid with water. Identify the Bronsted acids and bases in the reaction. b) Determine the Ka of this acid c) if 250.0 ml of thi…

a- 4.00 L b- 13.4 L c- 11.2 L d- 22.4 L e- 5.60 L 2) For the following reaction,

a- 4.00 L b- 13.4 L c- 11.2 L d- 22.4 L e- 5.60 L 2) For the following reaction, if 11.2 L of nitrogen are reacted to form NH3 at STP, How many liters of hydrogen will be required…

a- Approximately how many grams of KNO3 will dissolve in 100g at 20 degrees C? H

a- Approximately how many grams of KNO3 will dissolve in 100g at 20 degrees C? How many at 60 degrees C? b- How many grams of KNO3 would dissolve in only 10g of water used at 20 d…

a- Identify promising properties of a as a lead compound. b- What was the benefi

a- Identify promising properties of a as a lead compound. b- What was the benefit of adding the amide? c- What might the function of the methyl group added in c be? d- What physic…

a- In the induced-fit model of enzyme action, a _______ must bind to the enzyme\

a- In the induced-fit model of enzyme action, a _______ must bind to the enzyme's______ for the enzyme to perform its function. (A) catalyst; activation energy (B) product; cataly…

a- Use the procedure from 9-4 (below) to find the concentration of Mg+2, F-, and

a- Use the procedure from 9-4 (below) to find the concentration of Mg+2, F-, and HF in a saturated aqueous solution of MGF2 held at pH 3.00 9-4. Suppose that 0.3 g of AlOOH (FM 59…

a- What is the maximum speed with which a 1200-kg car can round a turn of radius

a- What is the maximum speed with which a 1200-kg car can round a turn of radius 90.0 m on a flat road if the coefficient of static friction between tires and road is 0.60? Part b…

a- Which ions impart hardness to water? Na + Ca 2+ K + Mg 2+ Fe 3+ Cl - B- Prior

a- Which ions impart hardness to water? Na+ Ca2+ K+ Mg2+ Fe3+ Cl- B-Prior to the Clean Water Act of 1977, the user was responsible for the quality of water. -True - False C- What …

a-donor, or a-donor/t-acceptor) by circling the appropriate abbreviation in the

a-donor, or a-donor/t-acceptor) by circling the appropriate abbreviation in the rightmost column lable Table 1. Molar Absorbance Absorptivity.e- concentration "C" A" at (L moli cm…

a-k please 1. Mark the following statements from (a) - (o) True or False. 45 poi

a-k please 1. Mark the following statements from (a) - (o) True or False. 45 points (3 points each) The two isotopes of chlorine, 35CI and 37Cl will have 18 and 20 protons respect…

a. (3 pts) Your car should get 30 mi/gal running on octane (CsH18) and you are g

a. (3 pts) Your car should get 30 mi/gal running on octane (CsH18) and you are going to drive 13 miles to your friends house. You particularly purchased this car because you are c…

a. (4 Points) A parent process fopen0s the following file and fgets0s the first

a. (4 Points) A parent process fopen0s the following file and fgets0s the first two lines: (1) Mary had a little lamb (2) whose fleece was white a snow (3) and everywhere that Mar…

a. (5 points) We have two solutions: one in which sugar is dissolved in water an

a. (5 points) We have two solutions: one in which sugar is dissolved in water and the odher solution contains sugar dissolved in oil. The concentration of sugar on a molar basis i…

a. (5 points) We have two solutions: one in which sugar is dissolved in water an

a. (5 points) We have two solutions: one in which sugar is dissolved in water and the odher solution contains sugar dissolved in oil. The concentration of sugar on a molar basis i…

a. (a) During this experiment you are asked to dissolve a small amoura of your p

a. (a) During this experiment you are asked to dissolve a small amoura of your purified crystals in sthyt acetate to create a spotting 01 for TLc analysis what would the effeut be…

a. ) Write a balanced net ionic equation for dissolution reaction of Z n S in ac

a. ) Write a balanced net ionic equation for dissolution reaction of ZnS in acidic solution. Express your answer as a chemical equation. Identify all of the phases in your answer …

a. -395 kJ/mol b. +395 kJ/mol c. -790 kJ/mol d. +790 kJ/mol In a chemical reacti

a. -395 kJ/mol b. +395 kJ/mol c. -790 kJ/mol d. +790 kJ/mol In a chemical reaction, 65 kJ of energy are needed to break all of the bonds of the reactants, and 85 kJ of energy are …

a. 0.12 M KNO2 b. 0.50 M NH4NO3 **PLEASE SHOW WORK** Formula Name Value of K. HS

a. 0.12 M KNO2 b. 0.50 M NH4NO3 **PLEASE SHOW WORK** Formula Name Value of K. HSO HCIO2 HC2H,CIO HF HNO2 HC2H,O2 IA(H,O HOCI HCN Hydrogen sulfate ion Chlorous acid Monochloracetic…

a. 2-chlorobutane b. 2-methyl-2-chlorobutane c. 1-chlorobutane you expect to be

a. 2-chlorobutane b. 2-methyl-2-chlorobutane c. 1-chlorobutane you expect to be most reactive in an SN2 reaction? chloromethane 2. Which of the following statements is most TRUE r…

a. 2KClO3 (s) -> 2KClO2 (s) + O2 (g) b. KClO3 (s) -> KClO (s) + O2 (g) c. 2KClO3

a. 2KClO3 (s) -> 2KClO2 (s) + O2 (g) b. KClO3 (s) -> KClO (s) + O2 (g) c. 2KClO3 (s) -> 2KCl (s) + 3O2(g) In the appropriate spaces above, fill in the values of the ratio…

a. 412 pressure of c. 82 atm 640 b, atm gofonygen 2. 25.8 atm gasina15OL Which o

a. 412 pressure of c. 82 atm 640 b, atm gofonygen 2. 25.8 atm gasina15OL Which one the container 3Tch of following 196 innertransition atm isan wtransition) maximum demenn number …

a. 412 pressure of c. 82 atm 640 b, atm gofonygen 2. 25.8 atm gasina15OL Which o

a. 412 pressure of c. 82 atm 640 b, atm gofonygen 2. 25.8 atm gasina15OL Which one the container 3Tch of following 196 innertransition atm isan wtransition) maximum demenn number …

a. 5.40g of bromine reacted with 8.58g of iodine. What is anempiracal formula of

a. 5.40g of bromine reacted with 8.58g of iodine. What is anempiracal formula of the compound that was formed? b. What is the molecular formula of this compound if we knowthat its…

a. A 0.6740-g sample of impure Ca(OH) 2 is dissolved in enough water to make 57.

a. A 0.6740-g sample of impure Ca(OH)2 is dissolved in enough water to make 57.70 mL of solution. 20.00 mL of the resulting solution is then titrated with 0.2546-M HCl. What is th…

a. A 100.-g sample of water is placed in an insulated container and allowed to c

a. A 100.-g sample of water is placed in an insulated container and allowed to come to room temperature at 21C. To heat the water sample to 4 1C, how much must you add to it? b. c…

a. A 250.0 mL buffer solution contains 0.157 M RbF and 0.165 M HF. For HF, Ka= 3

a. A 250.0 mL buffer solution contains 0.157 M RbF and 0.165 M HF. For HF, Ka= 3.5x10^-4 Label each as a strong or weak acid ;strong or weak base; acidic, basic or neutral salt: H…

a. A commercial antacid was analyzed to determine the amount of antacid present

a. A commercial antacid was analyzed to determine the amount of antacid present in the sample. Complete table for l of the analysis (see Report sheet) Record calculated values wit…

a. A determination of the molar solubility and the K_sp calcium hydroxide was co

a. A determination of the molar solubility and the K_sp calcium hydroxide was completed according to the experimental procedure. The following data were collected for Trial 1. (Se…

a. A mixture of 60 mol % n-proplycyclohexane and 40 mol % n-propylbenzene is dis

a. A mixture of 60 mol % n-proplycyclohexane and 40 mol % n-propylbenzene is distilled through a simple distillation apparatus; assume that no fractionation occurs during the dist…

a. A mixture of 60 mol % n-proplycyclohexane and 40 mol % n-propylbenzene is dis

a. A mixture of 60 mol % n-proplycyclohexane and 40 mol % n-propylbenzene is distilled through a simple distillation apparatus; assume that no fractionation occurs during the dist…

a. A mixture of 60 mol % n-propylcyclohexane and 40 mol % n-propylbenzene is dis

a. A mixture of 60 mol % n-propylcyclohexane and 40 mol % n-propylbenzene is distilled through a simple distillation apparatus; assume that no fractionation occurs during the dist…

a. A mixture of tow gaseous elements undergoes a chemical reaction, forming a ga

a. A mixture of tow gaseous elements undergoes a chemical reaction, forming a gaseous compound. b. A mixture of two gaseous elements undergoes a chemical reaction, forming a solid…

a. A solution of cynaic acid (HOCN) with initial concentration 1.00x10^-2 M has

a. A solution of cynaic acid (HOCN) with initial concentration 1.00x10^-2 M has pH 2.77 Calculate the Ka of the acid b. A solution of formic acid (HCOOH , Ka = 1.8x10^-4) has pH o…

a. A student obtains a vinegar solution having an acetic acid concentration of 0

a. A student obtains a vinegar solution having an acetic acid concentration of 0.8512 M. What volume of 0.1036 M NaOH will be required to reach the equivalence point when 25.00 mL…

a. A student obtains a vinegar solution having an acetic acid concentration of 0

a. A student obtains a vinegar solution having an acetic acid concentration of 0.8512 M. What volume of 0.1036 M NaOH will be required to reach the equivalence point when 25.00 mL…

a. A student performed Part 3 of the lab. A 360 ppm Ca2+ standard required 22.34

a. A student performed Part 3 of the lab. A 360 ppm Ca2+ standard required 22.34 mL of EDTA to reach the end point. Some well water from my grandma’s farm required 15.47 mL of EDT…

a. A total of 21.15 ml of K2Cr2O7 is required for the titration of a 0.1414 gram

a. A total of 21.15 ml of K2Cr2O7 is required for the titration of a 0.1414 gram sample of FeSO4, that is 88.88% pure. If the products are Cr +3 and Fe +2, what is the molarity of…

a. According to the IR and NMR spectra, what types of C-H bonds are present in t

a. According to the IR and NMR spectra, what types of C-H bonds are present in the molecule? b. Are there other diagnostic features of the IR spectrum? c. What information about t…

a. Acetic acid (CHCOH, K = 1.8 10) and sodium acetate (NaCHO). b.Ammonium chlori

a. Acetic acid (CHCOH, K = 1.8 10) and sodium acetate (NaCHO). b.Ammonium chloride (NHCl, K for NH = 5.6 10) and ammonia (NH). Given: pH = 4.5 and 0.45M. 1.Decide which of the two…

a. An analysis was performed by creating a calibration curve with a set of 5 sta

a. An analysis was performed by creating a calibration curve with a set of 5 standard solutions. A plot of absorbance (y-axis) vs. concentration (x-axis) gave a slope of 5.22x104 …

a. An aqueous solution is made by dissolving 18.4 grams of iron(III) bromide in

a. An aqueous solution is made by dissolving 18.4 grams of iron(III) bromide in 314 grams of water.   The molality of iron(III) bromide in the solution is ________m. b.In the labo…

a. As a technician in a large pharmaceutical research firm, you need to produce

a. As a technician in a large pharmaceutical research firm, you need to produce 150. mL of 1.00 M potassium phosphate buffer solution of pH = 6.92. The pKa of H2PO4 is 7.21. You h…

a. As defined by Spencer, Bodner and Rickard, Chemistry: Structure & Dynamics, 5

a. As defined by Spencer, Bodner and Rickard, Chemistry: Structure & Dynamics, 5 th edition, what two factors contribute to the metallic character of an atom? How do they cont…

a. As defined by Spencer, Bodner and Rickard, Chemistry: Structure & Dynamics, 5

a. As defined by Spencer, Bodner and Rickard, Chemistry: Structure & Dynamics, 5 th edition, what two factors contribute to the metallic character of an atom? How do they cont…

a. Assuming that rivers are the only input and that the oceans are in steady sta

a. Assuming that rivers are the only input and that the oceans are in steady state with respect to element K+ calculate the residence time for K+ using the data in the Table below…