Laser_3

Granary rust question photo included

Granary rust question photo included

A) Equation 1: Write the first possible oxidation half-reaction of Fe(s) that produces an iron ion:

B) Using oxidation numbers, describe what is happening in the above reaction.

C) Equation 2: The next possible oxidation reactio

polishprodigy93   80   3 Replies

bio_man

Find the concentration of the Sn2+(aq) in mol/L?

Find the concentration of the Sn2+(aq) in mol/L?

Experimental Design

The potassium dichromate solution is first standardized by titration with a sample of an acidified mol/L solution of the primary standard, iron(II) ammonium sulfate-6-water.  The concentration of Cr2O72-(aq) 

polishprodigy93   68   3 Replies

bio_man

Finding the mass of tin?

Finding the mass of tin?

In a similar experiment, a sample of tin metal was dissolved in nitric acid to produce 15.00 mL of solution containing Sn2+. Titration analysis resulted in the calculation that the concentration of Sn2+ in this solution was 0.60 mol/L.

polishprodigy93   73   1 Reply

5 / 5

bio_man

What is the concentration of the Sn2+ solution?

What is the concentration of the Sn2+ solution?

A sample of pure tin metal is dissolved in nitric acid to produce 15.00 mL of solution containing Sn2+.  When this tin solution is titrated, a total of 42.1 mL of 0.145 mol/L KMnO4 is required to reach the equivalence point.


b.

polishprodigy93   64   3 Replies

bio_man

Redox stoich: the concentration of a tin(ll) chloride solution prepared from a sample of tin ore?

Redox stoich: the concentration of a tin(ll) chloride solution prepared from a sample of tin ore?

Problem

What is the concentration of a tin(ll) chloride solution prepared from a sample of tin ore?

Experimental Design

The potassium dichromate solution is first standardized by titration with 15.00 mL of an acidifie

polishprodigy93   51   N/A

polishprodigy93

What is the ionic charge for the nickel ion in NiCl2

What is the ionic charge for the nickel ion in NiCl2

chemistry

Mikayla   57   1 Reply

bio_man

What concentration of NH4NO3 is required to make [OH–] = 1.0 10–5 in a 0.200-M

What concentration of NH4NO3 is required to make [OH–] = 1.0 10–5 in a 0.200-M

What concentration of NH4NO3 is required to make [OH–] = 1.0   10–5 in a 0.200-M solution of NH3?

In my professors explainations, they do an ICE table and she automatically made NH4 initially equal to 0.78 M. Can you explain how she g

ohHminus   2207   6 Replies

sparky

The following galvanic cell has a potential of 1.214 V at 25 ∘C: ...

The following galvanic cell has a potential of 1.214 V at 25 ∘C: ...

The following galvanic cell has a potential of 1.214 V at 25 ∘C:
Hg(l)|Hg2Br2(s)|Br−(0.10M)||MnO4−(0.10M),Mn2+(0.10M),H+(0.10M)|Pt(s)
Calculate the value of Ksp for Hg2Br2 at 25 ∘C.

pcp98   669   5 Replies

5 / 5

bio_man

In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 Å ...

In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 Å ...

In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 Å (Li–F), 2.82 Å (Na-Cl), 3.30 Å (K–Br), and 3.67 Å (Rb–I), respectively.

1. Predict the cation–anion distance using the values of ionic radii giv

123

sarah52309   1771   33 Replies

5 / 5

lzfair

If 77.0 mL of nitrogen gas is collected over water at 50 °C and 763 mm Hg, what is the volume of ...

If 77.0 mL of nitrogen gas is collected over water at 50 °C and 763 mm Hg, what is the volume of ...

If 77.0 mL of nitrogen gas is collected over water at 50 °C and 763 mm Hg, what is the volume of dry nitrogen gas at STP? The vapor pressure of water at 50 °C is 92.5mm Hg.

cheryl wooten   49   1 Reply

5 / 5

bio_man

In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 Å (L

In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 Å (L

IN Chemistry: The central science, Volume I (12th ed.). Chapter 7 : End of Chapter question 7.38


In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 Å (Li–F), 2.82 Å (Na–Cl), 3.30 Å (K–Br), an

12

hornsbyp101   20085   22 Replies

5 / 5

Jonny

What is the pH of a solution made by mixing 5.00 mL of 0.10 M acetic acid with 5.00 mL of 0.10 M KOH

What is the pH of a solution made by mixing 5.00 mL of 0.10 M acetic acid with 5.00 mL of 0.10 M KOH

What is the pH of a solution made by mixing 5.00 mL of 0.10 M acetic acid with 5.00 mL of 0.10 M KOH? Assume that the volumes of the solutions are additive. Ka = 1.8×10-5 for CH3CO2H.

meganwise24   46   1 Reply

5 / 5

bio_man

Half-Life

Half-Life

Molecular iodine dissociates at 625 K with a first-order rate constant of 0.271 s−1. What is the half-life of this reaction?

Mkersey12   218   1 Reply

bio_man

Half-Life

Half-Life

A first-order reaction has a half-life of 26.4 seconds. How long does it take for the concentration of the reactant in the reaction to fall to one-eighth of its initial value?

Mkersey12   216   1 Reply

bio_man

The First-Order Integrated Rate Law

The First-Order Integrated Rate Law

Cyclopropane rearranges to form propene in the gas phase. The reaction is first order in cyclopropane and has a measured rate constant of 3.36 × 10−5 s−1 at 720 K. If the initial cyclopropane concentration is 0.0445 M, what is the cyclopropane concen

longzd   212   1 Reply

bio_man

The First-Order Integrated Rate Law

The First-Order Integrated Rate Law

You've determined that the decomposition of SO2Cl2 (under the given reaction conditions) is first order and has a rate constant of 2.90×〖10〗^(−4)  s^(−1).

SO2Cl2 (g) → SO2 (g) + Cl2 (g)

If the reaction is carried out

joanamet   28   1 Reply

5 / 5

bio_man

Using an Arrhenius Plot to Determine Kinetic Parameters

Using an Arrhenius Plot to Determine Kinetic Parameters

The decomposition of ozone is important to many atmospheric reactions.

O3 (g) → O2 (g) + O (g)

A study of the kinetics of the reaction resulted in the following data:

(a) Determine the value of the frequency factor an

bgoodwi1   33   1 Reply

5 / 5

bio_man

The Second-Order Integrated Rate Law

The Second-Order Integrated Rate Law

Consider the equation for the decomposition of NO2.

NO2 (g) → NO (g) + O (g)

The concentration of NO2 is monitored at a fixed temperature as a function of time during the decomposition reaction, and the data are tabulated in the

gabe.alao   37   1 Reply

xonotes

The nucleus of an atom consists mainly of:

The nucleus of an atom consists mainly of:

none of the above
 

protons and neutrons
 

protons and electrons
 

protons, neutrons and electrons
 

neutrons and electrons

zainab98   35   1 Reply

bio_man

HELP how to draw the products (2R,3S)-2-bromo-3-methylpentane

HELP how to draw the products (2R,3S)-2-bromo-3-methylpentane

I have attached the question please help I have been having trouble with this all day.
Thank You

12

beachbumbetty   6479   24 Replies

5 / 5

veronicaa728

Isolatoin of Citral from Lemongrass Oil

Isolatoin of Citral from Lemongrass Oil

1. Assume you have a solution containing two volatile liquids. Given the data for liquid A: MM = 56.89 g/mole, partial pressure = 0.903 atm and for liquid B: MM = 14.52 g/mole, partial pressure = 0.995 atm, what is the A:B ratio of the distillate?

Jessc   869   6 Replies

5 / 5

BEH

What volume of 0.305 M AgNO3 is required to react exactly with 155.0 mL of 0.274 M Na2SO4solution?

What volume of 0.305 M AgNO3 is required to react exactly with 155.0 mL of 0.274 M Na2SO4solution?

What volume of 0.305 M AgNO3 is required to react exactly with 155.0 mL of 0.274 M Na2SO4solution?  Hint:  You will want to write a balanced reaction.

a.581 mL
b.173 mL
c.345 mL
d.139 mL
e.278 mL

snguyen51   54   1 Reply

bio_man

Add 5.0 × 104 to 2.0 × 103 and express the answer in scientific notation.

Add 5.0 × 104 to 2.0 × 103 and express the answer in scientific notation.

Add 5.0 × 104 to 2.0 × 103 and express the answer in scientific notation.

boyo4man   50   1 Reply

bio_man

A 1.35 m aqueous solution of compound X had a boiling point of 101.4 °C. Which one of the following

A 1.35 m aqueous solution of compound X had a boiling point of 101.4 °C. Which one of the following

A 1.35 m aqueous solution of compound X had a boiling point of 101.4 °C. Which one of the following could be compound X? The boiling point elevation constant for water is 0.52 °C/m.
A) C6H12O6
B) CH3CH2OH
C) Na3PO4
D) CaCl2
E

chemDO   1080   3 Replies

missmyz02

The balanced equation involves the corresponding coefficients ________.C6H14 + O2 → CO2 + H2O

The balanced equation involves the corresponding coefficients ________.C6H14 + O2 → CO2 + H2O

The balanced equation involves the corresponding coefficients ________.
C6H14 + O2 → CO2 + H2O
A) 1: 9: 6: 7
B) 1: 10: 6: 7
C) 2: 19: 12:14
D) 2: 21: 6: 7

cynthiaa   96   2 Replies

smperez-lopez63

If the entropy of a collection of molecules in 5000 boxes is 1.76 × 10-20 J/K, how many molecules ar

If the entropy of a collection of molecules in 5000 boxes is 1.76 × 10-20 J/K, how many molecules ar

If the entropy of a collection of molecules in 5000 boxes is 1.76 × 10-20 J/K, how many molecules are there?

Whelan   868   6 Replies

abbspence

The main difference between conductors and insulators is in terms of

The main difference between conductors and insulators is in terms of

The main difference between conductors and insulators is in terms of

bernsel   67   1 Reply

bio_man

Given that the pH of a Benzoic Acid solution is 3.00, calculate the ratio of dissolved Benzoic Acid ...

Given that the pH of a Benzoic Acid solution is 3.00, calculate the ratio of dissolved Benzoic Acid ...

Given that the pH of a Benzoic Acid solution is 3.00, calculate the ratio of dissolved Benzoic Acid to Benzoate ion at equilibrium.  K_a for Benzoic Acid is 6.46×〖10〗^(-5).


a. If the pH is 6.00, what is this ratio

Jessc   443   4 Replies

yoyoyoyo69699

Choose the substance with the lowest boiling point.

Choose the substance with the lowest boiling point.

Choose the substance with the lowest boiling point.
A) H2Se
B) NBr3
C) N2
D) CBr2H2
E) H2O2

SydTay   102   2 Replies

doctorcaddy007

The theoretical number of water moles produced from two moles of C6H14 is ________.C6H14 + O2 → ...

The theoretical number of water moles produced from two moles of C6H14 is ________.C6H14 + O2 → ...

The theoretical number of water moles produced from two moles of C6H14 is ________.
C6H14 + O2 → CO2 + H2O
A) 1
B) 6
C) 7
D) 14

centromere   538   3 Replies

smperez-lopez63

Which of the compounds, NaH , PH3, CH4, IBr3 are ionic compounds?

Which of the compounds, NaH , PH3, CH4, IBr3 are ionic compounds?

Which of the compounds, NaH , PH3, CH4, IBr3 are ionic compounds?
A) only CH4
B) only NaH
C) Na H and PH3
D) PH3, CH4, and IBr3

jayjayhussle310   117   3 Replies

5 / 5

dperson19

Explain why polyamides tend to be crystalline polymers.

Explain why polyamides tend to be crystalline polymers.

Explain why polyamides tend to be crystalline polymers.

thall031   78   1 Reply

ZanLau

Explain why polyamides tend to be crystalline polymers.

Explain why polyamides tend to be crystalline polymers.

Explain why polyamides tend to be crystalline polymers.

SydTay   85   3 Replies

5 / 5

palmerga

Which tend to exhibit a higher degree of crystallinity, isotactic or atactic polymers? Explain briefly.

Which tend to exhibit a higher degree of crystallinity, isotactic or atactic polymers? Explain briefly.

Which tend to exhibit a higher degree of crystallinity, isotactic or atactic polymers?  Explain briefly.

gerti   91   1 Reply

samanthajones10

Which type of polymer, isotactic or atactic, tends to be stronger and stiffer? Explain briefly.

Which type of polymer, isotactic or atactic, tends to be stronger and stiffer? Explain briefly.

Which type of polymer, isotactic or atactic, tends to be stronger and stiffer?  Explain briefly.

QueenPinky   75   2 Replies

QueenPinky

What name is given to nonvolatile liquids that dissolve in polymers and thus lower the attractions ...

What name is given to nonvolatile liquids that dissolve in polymers and thus lower the attractions ...

What name is given to nonvolatile liquids that dissolve in polymers and thus lower the attractions between the polymers' chains?

loweba1   77   1 Reply

Chris Rodz

Low-density polyethylene is soft and flimsy because it has a ________ and ________ structure.

Low-density polyethylene is soft and flimsy because it has a ________ and ________ structure.

Low-density polyethylene is soft and flimsy because it has a ________ and ________ structure.

• unbranched; crystalline

• highly branched; amorphous

• highly branched; crystalline

• unbranched; triglyceride

• unbranched; amorphous

lulalu   72   3 Replies

Sunni_rae

When a plasticizer is added to a polymer, the overall effect is to ________ the crystallinity of the ...

When a plasticizer is added to a polymer, the overall effect is to ________ the crystallinity of the ...

[html]When a plasticizer is added to a polymer, the overall effect is to ________ the crystallinity of the polymer and ________ its Tg.

• eliminate; raise

• increase; raise

• reduce; raise

• reduce; lower

klcarrasquillo   99   1 Reply

ninim2998

Below Tg, crystalline polymers exist as ________.

Below Tg, crystalline polymers exist as ________.

[html]Below Tg, crystalline polymers exist as ________.

• thermoplastics which are flexible and moldable

• liquids which are flexible and moldable

• glasses of low flexibility

• thermoplastics which are r

Hellohi21   75   3 Replies

Jamesriverdean

Above Tm, crystalline polymers exist as ________.

Above Tm, crystalline polymers exist as ________.

[html]Above Tm, crystalline polymers exist as ________.

• thermoplastics which are flexible and moldable

• liquids which are flexible and moldable

• glasses of low flexibility

• thermoplastics which are r

teacherlovinz   72   1 Reply

lakeisha