Chemistry concepts and calculations
117302 questions • Page 2330 / 2347
what were cfcs primarly used for before their potential as ozone-destorying chem
what were cfcs primarly used for before their potential as ozone-destorying chemicals was recogznied? What compounds have been used as replacements? oxygen protects us from ultrav…
what were cfcs primarly used for before their potential as ozone-destorying chem
what were cfcs primarly used for before their potential as ozone-destorying chemicals was recogznied? What compounds have been used as replacements? oxygen protects us from ultrav…
what will happen if aluminium sulfate is overdosed as a coagulant in a water tre
what will happen if aluminium sulfate is overdosed as a coagulant in a water treatment process ? Question Completion Status: Moving to the next question prevents changes to this a…
what will the pressure be of this problem? will it be 30.25in Hg×25.4mm/in =768.
what will the pressure be of this problem? will it be 30.25in Hg×25.4mm/in =768.4mmhg×1 atm/760mmhg=1.010986 atm OR 30.25inHg×25.4mm/in =768.4mmhg -23.8 mmhg (since the vapor pres…
what will the pressure be of this problem? will it be 30.25in Hg×25.4mm/in =768.
what will the pressure be of this problem? will it be 30.25in Hg×25.4mm/in =768.4mmhg×1 atm/760mmhg=1.010986 atm OR 30.25inHg×25.4mm/in =768.4mmhg -23.8 mmhg (since the vapor pres…
what would be the strongest and second strongest bond or force for number 3? (Cs
what would be the strongest and second strongest bond or force for number 3? (CsH12) molecules arise from B carbon-carbon bonds C) dipole-dipole forces. ion-dipole interactions. E…
what would the chemical reaction, with indicated necessary reagents and conditio
what would the chemical reaction, with indicated necessary reagents and conditions, plus the major organic product(s) be for 3,3 - dimethyl- 1- butene with heating with dilute h2s…
what\'s the answer to 66? 12.66 A solution of 6.85 of a carbohydrate in 100.0 g
what's the answer to 66? 12.66 A solution of 6.85 of a carbohydrate in 100.0 g of water has a g of 024 g/ml, and osmotic pressure density an mass of of 4.61 atm at 20.0 C, Calcula…
what\'s the correct answer for these question some answer is not correct, I want
what's the correct answer for these question some answer is not correct, I want to know the correct answer. 1· Thc two solvents you investigated in the laboratory were water and c…
what\'s wrong with my answer? Enter your answer In the provided box You analyze
what's wrong with my answer? Enter your answer In the provided box You analyze a sample of volatile liquid propyl acetate (C5H10O2) by placing a small volume of it In a round-bott…
whats the answer 03 Question t soim shuetle Discovery in Augunt 19115, whenthe m
whats the answer 03 Question t soim shuetle Discovery in Augunt 19115, whenthe maximum winds of the storm were sbout 90 mite and the pressure was 400 mbar lower at the center than…
whats the answer This is a Numeric Entry question / It is worth 1 pointuhave unl
whats the answer This is a Numeric Entry question / It is worth 1 pointuhave unlinited sttermpts/There is no attermept penailty Sh10.3 Millian Given o.. enns.co.ke 10 Question (a …
whats the answer to this question 2 how do you balnce the equations and whats th
whats the answer to this question 2 how do you balnce the equations and whats the ans for question 3 . Create a clear, well-labelled table to organize collected over the course of…
whats the correct answer O This is a Mamerkc Entry question/it is worths 1 peirt
whats the correct answer O This is a Mamerkc Entry question/it is worths 1 peirt/ You hae unlimited sttempts/Theris to atherpt pery 06 Question ( point) A weather balloon is fille…
whats the correct answer please 07 Question (1 point) US Senator Proteats A US S
whats the correct answer please 07 Question (1 point) US Senator Proteats A US Sesasor has pretested atter a count 4th attempt teférence List: Books egishpurdue edu A (Amenican ha…
whats wrong with this Python code !! # This program removes names and email addr
whats wrong with this Python code !! # This program removes names and email addresses occurring in a given input file and saves it in an output file. import re def deidentify(): i…
when 0.102 g of an unknown compound was dissolved in 100 ml of water on osmotic
when 0.102 g of an unknown compound was dissolved in 100 ml of water on osmotic pressure of 28.1 torr was measured at 20 Celsius. calculate molar mass of the compound when 0.102 g…
when 0.89g of an unknown no electrolyte is dissolved in 50.0g of benzene the fre
when 0.89g of an unknown no electrolyte is dissolved in 50.0g of benzene the freezing point decreased by 0.48 Celsius. if the KP of the solvent is 5.12 K/m calculate the molar mas…
when 1.00L of 2.00 M Na 2SO4 at 30.0 C is added to 2.00 L of 0.750 M Ba (NO3)2 a
when 1.00L of 2.00 M Na 2SO4 at 30.0 C is added to 2.00 L of 0.750 M Ba (NO3)2 at 30.0 C a white precipitate forms and the temperature raises to 420 C. Write the precipitation rea…
when 10.0g of c6 when 10.0g of c6 when 10.0g of c6 when 10.0g of c6 Acid Fast St
when 10.0g of c6 when 10.0g of c6 when 10.0g of c6 when 10.0g of c6 Acid Fast Staining Technique Attached Files: Acid Fast Staining Technique doc (33.5 KB) Lab Report required for…
when 15.12 ml of 0.1194 M NaOH is added to 25 ml of 0.1264 M HX(an unnknown weak
when 15.12 ml of 0.1194 M NaOH is added to 25 ml of 0.1264 M HX(an unnknown weak acid),the resulting pH is 5.9 . what is the ka of the unknown acid?
when 15.12 ml of 0.1194 M NaOH is added to 25 ml of 0.1264 M HX(an unnknown weak
when 15.12 ml of 0.1194 M NaOH is added to 25 ml of 0.1264 M HX(an unnknown weak acid),the resulting pH is 5.9 . what is the ka of the unknown acid?
when 2.61 g of solid Na2CO3 is dissolved in sufficient water to make 250 mL of s
when 2.61 g of solid Na2CO3 is dissolved in sufficient water to make 250 mL of solution, concentration of Na2CO3 is: The answer is 0.0985 M, need to know how to get it! when 2.61 …
when 20.6gm of methanol and 39.7gm of chlorine under go reaction that has 73.3%
when 20.6gm of methanol and 39.7gm of chlorine under go reaction that has 73.3% yield, what mass of chlormethene CH3Cl forms? Hydrogen chloride also forms----------gm CH3Cl
when 20.6gm of methanol and 39.7gm of chlorine under go reaction that has 73.3%
when 20.6gm of methanol and 39.7gm of chlorine under go reaction that has 73.3% yield, what mass of chlormethene CH3Cl forms? Hydrogen chloride also forms----------gm CH3Cl
when 50.0 grams of silicon dioxide is heated with an excess of carbon, 32.2 gram
when 50.0 grams of silicon dioxide is heated with an excess of carbon, 32.2 grams carbonide along with carbon monoxide. what is the percent yield of silicon dioxide? how many gram…
when I maDe the CsPbBr3 with different temperatures at 130oC, 150oC, 170oC and 1
when I maDe the CsPbBr3 with different temperatures at 130oC, 150oC, 170oC and 190oC with oleic acid, Oleylamine, octadecene, Cs-oleate and PbBr2 . We supposed to have different s…
when I made this test on Sunday evening at 8:50 PM When I made this test on Sund
when I made this test on Sunday evening at 8:50 PM When I made this test on Sunday evening at 8:50PM, April 24,2016 [before my eye operation tomorrow morning (April 25th)] the out…
when a 0.134 g popcorn kernel pops, it loses about 13% of its mass. Assuming tha
when a 0.134 g popcorn kernel pops, it loses about 13% of its mass. Assuming that the volume of a typical kernel is 9.5x10 mL and that the mass loss is due to water lost, use the …
when a 28.4 mL sample of a 0.308 M aqueous nitrous acid solution is titrated wit
when a 28.4 mL sample of a 0.308 M aqueous nitrous acid solution is titrated with a 0.477 M aqueous barium hydroxide solution 1. what is the ph at the midpoint in the titration 2.…
when a compound X is to partition between two solvents Y and Z, comment on the m
when a compound X is to partition between two solvents Y and Z, comment on the molecular interactions of compound X with each of the two solvents if a) the activity coeffiicient Y…
when a mixture of Eugenol and methylene chloride was heated, the methylene chlor
when a mixture of Eugenol and methylene chloride was heated, the methylene chloride evaporated and left behind pure Eugenol. Since the boiling point of methylene chloride is 40C, …
when a person moves from the fed to the fasting state following a meal, there is
when a person moves from the fed to the fasting state following a meal, there is an incase in the mobilization of the components of triacylglycerol. all of the following help to m…
when a sedentary fasting person begins to exercise, all of the following occur E
when a sedentary fasting person begins to exercise, all of the following occur EXCEPT: a. exercise activates AMP-protein kinase and results in more glut4 moving to the cell membra…
when a solute is added to a solvent, the boiling point of the solution is higher
when a solute is added to a solvent, the boiling point of the solution is higher than the pure solvent's was, but the melting point of it is lower. i know this is because the inte…
when a solute is added to a solvent, the boiling point of the solution is higher
when a solute is added to a solvent, the boiling point of the solution is higher than the pure solvent's was, but the melting point of it is lower. i know this is because the inte…
when a student was making his volumetric solution using the100mL volumetric flas
when a student was making his volumetric solution using the100mL volumetric flask, he filled the flask past the mark. a. how would this affect the molarity of his solution? e.g.wo…
when a student weighed her piece of magnesium ribbion before it was weighed she
when a student weighed her piece of magnesium ribbion before it was weighed she observed that the ribbon had a thick coat of transit. the student ignored the tarnish and weighted …
when balancing equation in acidic conditions identify coefficient for h2o to+br2
when balancing equation in acidic conditions identify coefficient for h2o to+br2 Number 2. 6 +2, -1 d. -2, +1 e. None of the above are correct 2. When balancing the equation below…
when balancing the equation in basic Number 15 When balancing the equation below
when balancing the equation in basic Number 15 When balancing the equation below in basic conditions what to the sum of all the coefficients in the equations? Zn + NO_3^-1 rightar…
when coal is burned, the sulfur present in coal is converted to sulfur dioxide (
when coal is burned, the sulfur present in coal is converted to sulfur dioxide (SO2) which is responsible for the acid rain phenomenon: S(s)+O2(g) --> SO2(g) If 3.00 kg of S re…
when constructing a calibration plot (curve) for a FD&C food dye you must ( you
when constructing a calibration plot (curve) for a FD&C food dye you must ( you can select more than one answers) a. Only use solutions with absorbance readings above 1.50 b.T…
when cooling the final solution as crystals form why is the solution ultimately
when cooling the final solution as crystals form why is the solution ultimately cooled in an ice bath? why is the solution cooled first at room temp then in an ice bath? when cool…
when determining the melting point of an unknown substance it is common practice
when determining the melting point of an unknown substance it is common practice to fist determine rough melting point by quickly heating the sample followed by careful determinat…
when determining the melting point of an unknown substance, it is a common pract
when determining the melting point of an unknown substance, it is a common practice to fist determine a rough melting point by quickly heating the sample followed by a careful det…
when each of the following pairs of aqueous solutions aremixed, do a percipitati
when each of the following pairs of aqueous solutions aremixed, do a percipitation reaction occur? if so, write the formulaand name of the percipitate a) potassium iodide+lead(II)…
when hydrogen sulfide gas is passed over solid hot iron(iii) hydroxide, the resu
when hydrogen sulfide gas is passed over solid hot iron(iii) hydroxide, the resultant reaction produces solid iron(iii) sulfide and gaseous water. Write and balance the reaction w…
when iron(2) reacts with permanganate in acidic solution: in 3rd step why we mul
when iron(2) reacts with permanganate in acidic solution: in 3rd step why we multiply oxidation halfreaction:{Fe(aq)____Fe(aq)+e}by 5. in 3rd step why we multiply oxidation halfre…
when iron(2) reacts with permanganate in acidic solution: in 3rd step why we mul
when iron(2) reacts with permanganate in acidic solution: in 3rd step why we multiply oxidation halfreaction:{Fe(aq)____Fe(aq)+e}by 5. in 3rd step why we multiply oxidation halfre…
when magnesium and oxygen react and form am ionic compound, why is there only on
when magnesium and oxygen react and form am ionic compound, why is there only one oxygen atom for each magnesium atom instead of two? which option is correct? 4 Moving to the next…
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