Chemistry concepts and calculations

1) Osmosis is the process responsible for carrying nutrients and water from grou

1) Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. The osmotic pressures required for this process can b…

1) Over 95% of the mass of living things is composed of these 5 elements: a)carb

1) Over 95% of the mass of living things is composed of these 5 elements: a)carbon, hydrogen,oxygen,nitrogen,phosphorous,sulfur b)Carbon,hydrogen,oxygen,nitrogen,potassium,sulfur …

1) Oxygen gas dissolved in water can be used by fish, which remove it from the w

1) Oxygen gas dissolved in water can be used by fish, which remove it from the water by means of their gills. Classify the change that occurs when oxygen dissolves in water. a. Ph…

1) Ozone is depleted in the stratosphere by chlorine from CF 3 Cl according to t

1) Ozone is depleted in the stratosphere by chlorine from CF3Cl according to the set of equations: What total volume of ozone at a pressure of 24.9 mmHg and a temperature of 238 K…

1) P roduce a webpage giving a description of your career. I want you to have wr

1) Produce a webpage giving a description of your career. I want you to have write at least 2 paragraphs: one on why you have chosen the major (and minor, if any) that you are in …

1) Part A 0.50 g of hydrogen chloride (HCl) is dissolved in water to make 8.0 L

1) Part A 0.50 g of hydrogen chloride (HCl) is dissolved in water to make 8.0 L  of solution. What is the pH of the resulting hydrochloric acid solution? Express the pH numericall…

1) Part A What is the H+ concentration for an aqueous solution with pOH = 3.04 a

1) Part A What is the H+ concentration for an aqueous solution with pOH = 3.04 at 25 C? Express your answer to two significant figures and include the appropriate units. Part B Ar…

1) Part A a solution that is 0.175 M in HC2H3O2 and 0.120 M in KC2H3O2 Express y

1) Part A a solution that is 0.175 M in HC2H3O2 and 0.120 M in KC2H3O2 Express your answer using two decimal places. Part B a solution that is 0.195 M in CH3NH2 and 0.110 M in CH3…

1) Per the text, when performing a task such as a hardware deployment, checklist

1) Per the text, when performing a task such as a hardware deployment, checklists can be a valuable tool. Suggest at least three (3) items that you believe should be a part of eve…

1) Perform a hand simulation (draw a pitcure) of the mfq simulation lab to ensur

1) Perform a hand simulation (draw a pitcure) of the mfq simulation lab to ensure that you understand the algorithm. Your output should agree with the partial output provided in t…

1) Phenol red is an indicator that changes color over a range from pH=6.4 to pH=

1) Phenol red is an indicator that changes color over a range from pH=6.4 to pH=8.0. What is Ka of phenol red? Express to 1 sig fig (I put 0.2 but it's wrong) 2) Alizarin yellow R…

1) Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used i

1) Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used in manufacturing certain dyes and plastics. Phosgene can be produced by reacting carbon monoxide and…

1) Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used i

1) Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used in manufacturing certain dyes and plastics. Phosgene can be produced by reacting carbon monoxide and…

1) Place the elements Rb, Cs, K, Na in order of increasing metallic character? 2

1) Place the elements Rb, Cs, K, Na in order of increasing metallic character? 2) Identify the most reactive alkali metal with water? A) Li    B) Na    C) K    D) Cs      E) Rb 3)…

1) Place the following four species in order of increasing boiling point. SCl 2

1) Place the following four species in order of increasing boiling point. SCl2, CH3CH3, HCl, Ne 2) Rationalize the observation that CH3CH2OH, ethanol has a boiling point of 78.0 °…

1) Please do not include units or input answers in scientific notation for any o

1) Please do not include units or input answers in scientific notation for any of these questions. The HCl solution you are using needs to be standardized with Na2CO3. If 23.5 mL …

1) Please show me the work and answer for this question. Isotope X has a half li

1) Please show me the work and answer for this question. Isotope X has a half life of 10 days. A sample is known to have 1000 radioactive atoms. How many atoms will remain radioac…

1) Please, how do I find the values of k, using the equation ln(1-[V/Vinfinity])

1) Please, how do I find the values of k, using the equation ln(1-[V/Vinfinity])= -kt and the information given in the graph above (see picture). Please, show one example. 2) Plea…

1) Potassium hydroxide and phosphoric acid react to form potassium phosphate and

1) Potassium hydroxide and phosphoric acid react to form potassium phosphate and water according to the equation.         3KOH(aq)+H3PO4(aq)---->K3PO4(aq)+3H2O(l) Determine the…

1) Practice Quiz Ch 8 1) Two ice skaters, one with a mass of 45 kg and the other

1) Practice Quiz Ch 8 1) Two ice skaters, one with a mass of 45 kg and the other with a mass of 60 kg, push off against one another starting from a stationary position. After they…

1) Predict (write the sequences of) the fragments that would be generated from t

1)         Predict (write the sequences of) the fragments that would be generated from the treatment of             the following peptide Gly-Ala-Trp-Asp-Arg-Lys-Ala-Glu- Gly-Phe-…

1) Predict the overall reaction from the following two-step mechanism: 2A -> A2

1) Predict the overall reaction from the following two-step mechanism: 2A -> A2 (slow) A2 + B -> A2B (fast) Express your answer as a chemical equation. 2) Predict the rate l…

1) Predict the sign, (+) or (-), for H and S for the following reactions. 2 C(s)

1) Predict the sign, (+) or (-), for H and S for the following reactions. 2 C(s) + O (g)         2CO(g)                                 H: _____                  S: _____ CO2 (s) …

1) Prepare 250 mL of a 0.1 M phosphate buffer of pH approximately 7.2 . Thus, mo

1) Prepare 250 mL of a 0.1 M phosphate buffer of pH approximately 7.2. Thus, monosodium phosphate and its conjugate base, disodium phosphate will be used to prepare the buffer sol…

1) Prepare 250mL of a 0.35 M solution of hydrochloric acid. Concentrated hydroch

1) Prepare 250mL of a 0.35 M solution of hydrochloric acid. Concentrated hydrochloric acid comes from the chemical companies as a 12 M liquid. How much (in mL) of this 12 M soluti…

1) Problem 1: Hobson reported that they composted 3.5 tons of organic waste in a

1) Problem 1: Hobson reported that they composted 3.5 tons of organic waste in a windrow that was 2 m high, 10 m long, and 3 m wide. What is the SG gravity of the compost? What is…

1) Propane (C3H8)is a minor component of natural gas and is used domestic cookin

1) Propane (C3H8)is a minor component of natural gas and is used domestic cooking heating. (A) Balance the following equation representing the combustion of propane in air: C3H8+O…

1) Propose a reason why the specific heat of a solution would be slightly differ

1) Propose a reason why the specific heat of a solution would be slightly different that the specific heat of pure water. 2) The temperature change for the water was slight in you…

1) Propose a reason why the specific heat of a solution would be slightly differ

1) Propose a reason why the specific heat of a solution would be slightly different that the specific heat of pure water. 2) The temperature change for the water was slight in you…

1) Proteins can interact with double-stranded DNA via non-covalent interactions.

1) Proteins can interact with double-stranded DNA via non-covalent interactions. Among the different types of interactions listed below, which one(s) is/are most likely used by DN…

1) Pyridine is a weak base that is used in the manufacture of pesticides and pla

1) Pyridine is a weak base that is used in the manufacture of pesticides and plastic resins. It is also a component of cigarette smoke. Pyridine ionizes in water as follows: C5H5N…

1) Rank the following substances in order from most soluble in water to least so

1) Rank the following substances in order from most soluble in water to least soluble in water: ethane, C2H6; 2-pentanol, C5H11OH; copper(II) sulfate, CuSO4; and propane, C3H8. 2)…

1) Rank the following titrations in order of increasing pH at the halfway point

1) Rank the following titrations in order of increasing pH at the halfway point to equivalence (1 = lowest pH and 5 = highest pH). 1 2 3 4 5  200.0 mL of 0.100 M H2NNH2 (Kb = 3.0 …

1) Rank these elements in order of increasing ionization energy (least IE first,

1) Rank these elements in order of increasing ionization energy (least IE first, to the left; most IE last, to the right). Explain your ranking in terms of the behaviors of metals…

1) Rank these elements in order of increasing ionization energy (least IE first,

1) Rank these elements in order of increasing ionization energy (least IE first, to the left; most IE last, to the right). Explain your ranking in terms of the behaviors of metals…

1) Reacting molecules or ions in a solution at room temperature are in constant

1) Reacting molecules or ions in a solution at room temperature are in constant motion and collide. Some collisions lead to a formation of product and some do not. What determines…

1) Reaction of acids with metals: Drop a small piece of \"mossy zinc\" into one

1) Reaction of acids with metals: Drop a small piece of "mossy zinc" into one well with hydrochloric acid and into another well with Acetic acid. Record your observations Observat…

1) Read about Pulse Code Modulation on Wikipedia or another source. Briefly desc

1) Read about Pulse Code Modulation on Wikipedia or another source. Briefly describe at least two real-world uses of PCM, including sampling rate and the number of bits used to re…

1) Recall: Cx (concentration) Px (partial pressure) Sx (solubility) where solubi

1) Recall: Cx (concentration) Px (partial pressure) Sx (solubility) where solubility has units of (mol/L)/pressure which is equal to mol/(L * pressure) Coke8 is packaged at 2.4 at…

1) Recursion. Write code to complete RaiseToPower(). Sample output if userBase i

1) Recursion.   Write code to complete RaiseToPower(). Sample output if userBase is 4 and userExponent is 2 is shown below. Note: This example is for practicing recursion; a non-r…

1) Report the slope of the best fit to the data (including units). What does the

1) Report the slope of the best fit to the data (including units). What does the slope of the curve correspond to? The slope of the line of best fit of the data is equal to -0.187…

1) Research to determine which fats YOU should avoid and which ones you should c

1) Research to determine which fats YOU should avoid and which ones you should consume. Discuss cis vs trans structure, saturated vs unsaturated long chains, and mono vs polyunsat…

1) Ringer\'s injection contain 0.86% of sodium chloride, 0.03% of potassium chlo

1) Ringer's injection contain 0.86% of sodium chloride, 0.03% of potassium chloride, and 0.033% of calcium chloride dihydrate. Calculate the sodium, potassium, calcium, and chlori…

1) Safety goggles must be worn in the lab when b) working with bases a) Working

1) Safety goggles must be worn in the lab when b) working with bases a) Working with acids b) working with toxic chemicals d) always 2) If you take extra reagent (more than needed…

1) Samples containing iron (II) ion can betitrated with solutions containing dic

1) Samples containing iron (II) ion can betitrated with solutions containing dichromate ion under acidicconditions. Cr2O7-2+ 6Fe +2+14H+ ---> 2Cr+3+6Fe+3+7H2O a) Which ion is o…

1) Select all of the following that are stronger oxidizing agents than Ni 2+ Sn,

1) Select all of the following that are stronger oxidizing agents than Ni2+ Sn, Fe3+, Ag1+, Br2, Cr3+, Na1+ 2) For this question you will need to consult the Standard Reduction Po…

1) Select all that apply (could be more than 1) OPTION 1: B is achiral. A and C

1) Select all that apply (could be more than 1) OPTION 1: B is achiral. A and C are enantiomers. B is more soluble in water. OPTION 2: A, B, and C are all chiral. A and C are iden…

1) Select all the processes below that are SPONTANEOUS. Freezing of water at 10°

1) Select all the processes below that are SPONTANEOUS. Freezing of water at 10°C Corrosion of iron metal (rust) Expansion of gas to fill the available volume Boiling of gasoline …

1) Should static analysis tool config be placed in source control? This config i

1) Should static analysis tool config be placed in source control? This config is not needed to compile/run software and some developers can have different preferences (even withi…

1) Silica gel column bed usually give good chromatogaphic results with which com

1) Silica gel column bed usually give good chromatogaphic results with which compounds? Choose all that apply. Choose all that apply. acetone hexane trichloroethane ethanol methan…