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Chem Chemistry Biochemistry Organic Chemistry

08/26/20

What is the condensed formula of 3-ethylheptane ?

Please write the condensed formula of 3-ethylheptane in one line.

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Chem Chemistry

08/24/20

What is the mass, in kilogram, of a 51.00 cm3 sample of ethyl alcohol? Density of ethyl alcohol = 0.789 g/cm3.

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Chem Science

06/12/20

What steps are needed to make 250.0 mL of a .20 mol/L solution from solid NaOH? And the molar mass of NaOH is 40g/Mol.

i need "a complete response that includes the required mass of the sample and a set of detailed instructions"

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Chem

06/04/20

When heated, KClO3 decomposes into KCl andO2. 2KClO3⟶2KCl+3O2 If this reaction produced 39.9 g KCl how many grams of O2 were produced?

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Chem Chemistry Organic Chemistry

05/27/20

What is the IUPAC Name for CH3CH2CH2CHCHCH2CH2CH3?

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Chem Chemistry Biochemistry Organic Chemistry

05/20/20

A bottle of Bourbon Whiskey contains 250.ml of liquid and 42% alcohol (C2H5OH). assuming density = 1.05g/ml, will the whiskey freeze if put into a -20.0 degree celsius freezer?

can someone please explain.

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Chem Chemistry Biochemistry Organic Chemistry

05/19/20

What is the concentration of bromide ion if 25.0 ml of a 0.50 M AlBr3 solution combines with 40.0 ml of a 0.35 M NaBr solution?

I converted AlBr3 and NaBr to moles however, I'm not so sure what to do after that. I know the final answer for the concentration of bromide ion is 0.79 mol/L. Can someone please help ?AlBr3 =... more

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Chem Chemistry Biochemistry Organic Chemistry

05/19/20

Can someone please tell me if there is an easier way to answer this question? and if I did it correctly please.

A 2.32g sample of Na2SO4*nH2 yields 1.42g Na2SO4 upon heating. What is the value of n?Na2SO4*nH20--->Na2SO4(s)+nH20(g)Molar Mass Na2SO4 =142 g/molMolar Mass H2O = 18.016 g/molI'm not sure if I... more

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Chem Biochemistry Organic Chemistry Ap Chemistry

05/19/20

A sample of ethanol (C2H6O) contains 3.024g of hydrogen. How many moles of carbon are in the sample ? Molar Mass of ethanol (C2H6O)=46.07g/mol

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Chem Science Chemistry Organic Chemistry

05/19/20

Please help! I cannot figure out the steps of going from mass of Hydrogen to moles of carbon in ethanol.

A sample of ethanol (C2H6O) contains 3.024g of hydrogen. How many moles of carbon are in the sample ? Molar Mass of ethanol (C2H6O)=46.07g/mol

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Answers •4

Chem Biology Chemistry Biochemistry

05/06/20

Water can decompose into H2 and O2 via electrolysis. How many moles of H2 could theoretically be obtained from 87.5 g of water. theoretical yeild: mol H2

Water can decompose into H2 and O2 via electrolysis. How many moles of H2 could theoretically be obtained from 87.5 g of water. theoretical yeild=:________________ mol H2

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Chem Chemistry

05/06/20

Consider the following oxidative half reaction:

Mn(s) --> Mn2+ + 2e-A) Couple the oxidation reaction with a reduction half reaction that makes the overall redox reaction non-spontaneous (electrolytic cell). Write the balanced redox reaction... more

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Chem Chemistry

05/06/20

Consider the following unbalanced redox reaction:

ClO3-(aq) + I-(aq) --> I2 (s) + Cl-(aq)A) Balance the redox reaction using water (H+ and OH-) as needed. Show work for each step.B) Identify the oxidizing reagent and the reducing reagent for... more

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Chem Chemistry

05/06/20

Consider the following two redox reactions without any companion counterions:

Cr(s) --> Cr3+ + 3e- oxidation half Ag(s) --> Ag+ + e- reduction half A) Write a balanced overall redox reaction where Cr is oxidized and Ag is reduced. Show work with cancelling of... more

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Chem Chemistry Organic Chemistry

05/06/20

BioOrganic Chemistry Problem

Look at the structural formula for D-tagatose.To what class of biomolecules does D-tagatose belong? What functional groups can you identify in D-tagatose? Would D-tagatose be soluble in water?... more

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Chem Chemistry

05/05/20

What is the pH of a buffer?

The Ka of H2CO3 is 4.3 x 10-7. What is the pH of a buffer with 0.10 M H2CO3 and 0.010 M NaHCO3?

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Chem Chemistry

05/05/20

What is the pH of a buffer?

The Ka of H2CO3 is 4.3 x 10-7. What is the pH of a buffer with 0.050 M H2CO3 and 0.50 M NaHCO3?

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Chem Chemistry

05/02/20

For the following gaseous reaction:

2 NO2 +F2 --> 2NO2F Generalized rate equation = k(PNO2)2 (PF2)You test the initial kinetics of the above reaction and get the following results:Initial: PNO2 = 1 atm, PF2 = 1 atm --> rate of... more

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Chem Chemistry

05/01/20

Reaction 1 and Reaction 2 are the first and second step in series for overall reaction 3.

1) CaCO3 (s) <--> Ca2+ (aq) + CO32-(aq) KC1 = 10-6.32) H+(aq) + CO32-(aq) <--> HCO3-(aq) KC2 = 10-10.33) ? <--> ? Ktotal = ?A. Write the reaction for... more

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Chem Chemistry

05/01/20

For the following reaction: A+2B+3C+D --> E , the kinetics expression has been experimentally determined to be: rate = k[A]^2[B][C]^0.5

a) What is the reaction order with respect to each of the reactants (A,B,C, and D)?b) What is the overall order of the reaction?c) If you were to double the initial concentration of A, half the... more

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Chem Chemistry

05/01/20

Write a generalized rate equation for the reaction with variables for the order of reactions. Hint: do gaseous reaction use brackets or P?

For the following gaseous reaction: 2 NO2 +F2 --> 2NO2F

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Chem Chemistry General Chemistry College Chemistry

04/30/20

Finding the difference in solubility

Consider the solubility of Ca(OH)2 in each of the following solutions. For each solution, indicate whether the Ca(OH)2 solubility will increase, decrease, or not change as compared to the... more

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Chem Chemistry Ap Chemistry Apchem

04/25/20

Titration equivlance point

Calculate the pH at the equivalence point for the titration of 4.938 M HA (a weak acid with pKa = 3.55) with 4.938 M NaOH.

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Chem Science Chemistry Ap Chemistry

04/25/20

Rate of reaction question

I. Increasing the temperature increases the rate of a chemical reaction BECAUSE II. the activation energy is lowered. A) I is TRUE, II is FALSE B) I is FALSE, II is TRUE C) I and II are BOTH FALSE... more

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Chem Science Chemistry Moles

04/22/20

How many atoms are there in 0.228 moles of water?

using dimensional analysis?

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Answers •1

What is the condensed formula of 3-ethylheptane ?

What is the mass, in kilogram, of a 51.00 cm3 sample of ethyl alcohol? Density of ethyl alcohol = 0.789 g/cm3.

What steps are needed to make 250.0 mL of a .20 mol/L solution from solid NaOH? And the molar mass of NaOH is 40g/Mol.

When heated, KClO3 decomposes into KCl andO2. 2KClO3⟶2KCl+3O2 If this reaction produced 39.9 g KCl how many grams of O2 were produced?

What is the IUPAC Name for CH3CH2CH2CHCHCH2CH2CH3?

A bottle of Bourbon Whiskey contains 250.ml of liquid and 42% alcohol (C2H5OH). assuming density = 1.05g/ml, will the whiskey freeze if put into a -20.0 degree celsius freezer?

What is the concentration of bromide ion if 25.0 ml of a 0.50 M AlBr3 solution combines with 40.0 ml of a 0.35 M NaBr solution?

Can someone please tell me if there is an easier way to answer this question? and if I did it correctly please.

A sample of ethanol (C2H6O) contains 3.024g of hydrogen. How many moles of carbon are in the sample ? Molar Mass of ethanol (C2H6O)=46.07g/mol

Please help! I cannot figure out the steps of going from mass of Hydrogen to moles of carbon in ethanol.

Water can decompose into H2 and O2 via electrolysis. How many moles of H2 could theoretically be obtained from 87.5 g of water. theoretical yeild: mol H2

Consider the following oxidative half reaction:

Consider the following unbalanced redox reaction:

Consider the following two redox reactions without any companion counterions:

BioOrganic Chemistry Problem

What is the pH of a buffer?

What is the pH of a buffer?

For the following gaseous reaction:

Reaction 1 and Reaction 2 are the first and second step in series for overall reaction 3.

For the following reaction: A+2B+3C+D --> E , the kinetics expression has been experimentally determined to be: rate = k[A]^2[B][C]^0.5

Write a generalized rate equation for the reaction with variables for the order of reactions. Hint: do gaseous reaction use brackets or P?

Finding the difference in solubility

Titration equivlance point

Rate of reaction question

How many atoms are there in 0.228 moles of water?

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