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Questions (53)

1.Pippete 20ml of 0.1M acetic acid and 20ml of 0.1M NaOH into a 100ml beaker (Remember that the final volume of this solution is
1. 1 answer
2. 684 views
If you were to use an aquatic plant for your starting material, what would you expected to see in terms of pigments and
1. 2 answers
2. 486 views
A sample of 7.80L of NH3 (ammonia) gas at 22 degrees and 735mmHg is bubbled into a 0.350L solution of 0.400M HCL(hydrochloric
1. 1 answer
2. 3,799 views
A 75.0mL sample of 1.56×10−2M Na2SO4(aq) is added to 75.0mL of 1.22×10−2M of Ca(NO3)2(aq).What percentage of the Ca+
1. 2 answers
2. 860 views
You are asked to bring the pH of 0.500L of 0.450M NH4Cl to 7.00.a) Which of the following solutions would you use: 10.0M HCl or
1. 3 answers
2. 748 views
A sample of 7.80L of NH3 (ammonia) gas at 22 degrees and 735mmHg is bubbled into a 0.350L solution of 0.400M HCL(hydrochloric
1. 0 answers
2. 883 views
A 75.0mL sample of 1.56×10−2M Na2SO4(aq) is added to 75.0mL of 1.22×10−2M of Ca(NO3)2(aq).What percentage of the Ca+
1. 1 answer
2. 1,184 views
You are asked to bring the pH of 0.500L of 0.450M NH4Cl to 7.00.a) Which of the following solutions would you use: 10.0M HCl or
1. 0 answers
2. 696 views
A sample of 7.80L of NH3(ammonia) gas at 22 degrees Celsius and 735torr is bubbled into a 0.350L solution of 0.400M HCl
1. 2 answers
2. 814 views
Calculate [H3O] in the following solutions.5.15x10-2M HCl and 7.62x10-2M NaC2H3O2 Responses HCl + NaC2H3O2. It appears there is
1. 4 answers
2. 1,805 views
Calculate [H3O] in the following solutions.a)4.0×10−2M HCl and 8.0×10−2M HOCl b)0.105M NaNO2 and 5.00×10−2M HNO2
1. 1 answer
2. 1,512 views
The following equation describes the oxidation of an acidified solution of sodium oxalate (Na2C2O4) by potassium
1. 4 answers
2. 954 views
Lead metal is added to 0.140M Cr^+3(aq).Pb(s)+ 2Cr^3+(aq)---> Pb^2+(aq) + 2Cr^2+(aq) a)What is [Pb^2+] when equilibrium is
1. 1 answer
2. 547 views
Lead metal is added to 0.140M Cr^+3(aq).Pb(s)+ 2Cr^3+(aq)---> Pb^2+(aq) + 2Cr^2+(aq) a)What is [Pb^2+] when equilibrium is
1. 0 answers
2. 475 views
The following reaction is used in some self-contained breathing devices as a source of O2.4KO2(s) + 2C02(g)---> 2K2CO3(s) +
1. 0 answers
2. 811 views
The pH of saturated Sr(OH)2 is found to be 13.12. A 15.0ml sample of saturated Sr(OH)2 is diluted to 250.0ml in a volumetric
1. 1 answer
2. 1,499 views
A solution is prepared by dissolving 10.00g of a monobasic salt in a total volume of 1.00litres. Th pH of this solution was
1. 1 answer
2. 531 views
A solution is prepared by dissolving 10.00g of a monobasic salt in a total volume of 1.00litres. Th pH of this solution was
1. 0 answers
2. 471 views
A solution is prepared by dissolving 10.00g of a monobasic salt in a total volume of 1.00litres. Th pH of this solution was
1. 1 answer
2. 509 views
The enzyme Y catalyzes the elementary reactionAB-->A + B An enzyme concentration of 1.0M Y can convert a maximum of 0.5M AB to
1. 1 answer
2. 2,863 views
A student placed 12.5 of glucose (C6H12O6) in a 100ml volumetric flask, added enough water to dissolve the glucose by swirling,
1. 1 answer
2. 1,689 views
A student placed 12.5 of glucose () in a 100.- volumetric flask, added enough water to dissolve the glucose by swirling, then
1. 1 answer
2. 979 views
If the last value of Period is less than the number of periods specified in the Parameters worksheet, increment the Period value
1. 0 answers
2. 409 views
"context affects content"what does this mean
1. 2 answers
2. 430 views
i have to catogerize the list based on which is ionic, polar covalent, and nonpolar covalent1.SI 2.HBr 3.HP 4.SO 5.BeF 6.BeCl
1. 1 answer
2. 542 views
What is the boiling point of water at an elevation of 1.55×10^4 ft ?The atmospheric pressure at sea level is 760mmHg . This
1. 1 answer
2. 1,707 views
The normal boiling point of water is 100.00 degrees celsius and the enthalpy of vaporization at this temperature is
1. 1 answer
2. 644 views
What is the longest wavelength of light that will provide photons of sufficient energy to break the pi bond and cause the
1. 1 answer
2. 544 views
What is the longest wavelength of light that will provide photons of sufficient energy to break the pi bond and cause the
1. 2 answers
2. 6,151 views
Use bond energies to estimate the enthalpy change for the following reactionC2H2 + H2-> C2H4 i figured the bonds broken are: 1 C
1. 2 answers
2. 2,759 views
The average bond enthalpy for a C=C double bond is 614kj/mol and that of a C-C single bond is 348kj/mol . Estimate the energy
1. 1 answer
2. 1,876 views
Draw the electron-dot structure for CHClO.
1. 3 answers
2. 977 views
a compound containing only boron, nitrogen and hydrogen was found to be 40.3% B, 52.2%N, and 7.5% H by mass. If 3.301g of this
1. 1 answer
2. 885 views
a compound containing only boron, nitrogen and hydrogen was found to be 40.3% B, 52.2%N, and 7.5% H by mass. If 3.301g of this
1. 2 answers
2. 898 views
a mixture is prepared using equal masses of two volatile liquid benzene, C6H6 and ethanol C2H5OH. what is the mole fraction of
1. 3 answers
2. 608 views
What electron transition in a hydrogen atom, starting from the orbit 10, will produce infrared light of wavelength 3040 ?
1. 2 answers
2. 960 views
How much energy, in joules, must be absorbed to convert to Na all the atoms present in 1.00mg of gaseous Na? The first
1. 1 answer
2. 6,273 views
Zinc dissolves in acid according to the balanced equation.Zn(s)+ 2H(aq)-> Zn(aq) + H2(g) a sample of zinc is placed in a ice
1. 1 answer
2. 661 views
Zinc dissolves in acid according to the balanced equation.Zn(s)+ 2H(aq)-> Zn(aq) + H2(g) a sample of zinc is placed in a ice
1. 0 answers
2. 633 views
Zinc dissolves in acid according to the balanced equation.Zn(s)+ 2H(aq)-> Zn(aq) + H2(g) a sample of zinc is placed in a ice
1. 0 answers
2. 592 views
A calorimeter contains 16.0ml of water at 15.0degrees celsius. When 1.60g of X(a substance with a molar mass of 46.0g/mol) is
1. 1 answer
2. 1,022 views
The complete combustion of butane, (g) is represented by the equationC4H10+13/2O2->4CO2+5H20 STANDARD ENTHALPY IS -2877KJ/MOL
1. 1 answer
2. 1,657 views
The complete combustion of butane, (g) is represented by the equationC4H10+ 13/2O2->4CO2+5H2O standard enthalpy is -2877kj How
1. 1 answer
2. 2,058 views
Calculate the standard enthalpy change for the reaction2A+B->2C+D Use the following data: Substance A=-257kj/mol B=-413kj/mol
1. 2 answers
2. 2,474 views
The combustion of hydrogen–oxygen mixtures is used to produce very high temperatures (approximately 2500 °C) needed for
1. 3 answers
2. 2,565 views
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What
1. 1 answer
2. 814 views
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What
1. 2 answers
2. 777 views
A 2.34L container of H2(g)at 752mmHg and 24 degrees is connected to a 3.17L container of He(g) at 717mmHg and 24 degrees.After
1. 1 answer
2. 497 views
A gaseous mixture of O2 and N2 contains 32.8% nitrogen by massHow do i figure out wat the mass is?
1. 3 answers
2. 1,330 views
Determine the number of moles ofa) N atoms in a sample of C7H5(NO2)3 that has the same number of O atoms as 12.6g C6H12O6
1. 6 answers
2. 2,749 views
Determine the number of moles ofN atoms in a sample of C7H5(NO2)3 that has the same number of O atoms as 12.6g C6H12O6
1. 2 answers
2. 1,121 views
To determine the approximate mass of a small spherical shot of copper, the following experiment is performed. When 140 pieces of
1. 3 answers
2. 1,873 views
Determine the number of moles ofa) N atoms in 42.5g of Mg(NO3)2 b) N atoms in a sample of C7H5(NO2)3 that has the same number of
1. 3 answers
2. 737 views

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