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4 years ago

How many moles of ag are formed by the complete reaction of 28.3 mol of pb?

1 answer:

4 0

Answer: 56.6 moles Explanation: 28.3 moles of Pb would produce twice as much moles as Ag. 28.3 X (2moles Ag/ 1 mol Pb) = 56.6 moles of Ag.

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Caproic acid, responsible for the odor of dirty socks, is composed of C, H, and O atoms. Combustion of a 0.225-g sample of this

puteri [66]

Answer: Empirical formula = C3H6O

C6H1202---Molecular formula

Explanation:

we first find the masses of C, H and O contained in the sample

mass of carbon

Mass of CO2 = 0.512g

molar mass of carbon = 12g/mol

Molar mass CO2 = 12+ (16X2)=44g/mol

Mass C = 12/44x 0.512 = 0.1396g of carbon

Mass Hydrogen

mass of H2O= 0.209g

Molar mass H2O = 18g/mol

Molar mass Hydrogen = 1.0079g x 2 = 2.0158g since Hydrogen gas is diatomic

Mass H = 2.0158/18 X 0.209 = 0.0234g Hydrogen

Mass of Oxygen in the sample = overall mass of Sample - mass of hydrogen and oxgen=

0.225 - ( 0.1396 + 0.0234) = 0.062g Oxygen

A) T o find Empirical formula

1ST STEP-- Divide through by each relative atomic mass:

C = 0.1396/12 = 0.01163

H = 0.0234/1.0079 = 0.0232

O = 0.0619/16 = 0.00387

2nd step Divide by smallest answer

C = 0.01163/0.00387 = 2.0998 = 3

H = 0.0232/0.00387 = 5.99 = 6

O = 0.00387/0.00387=1

Empirical formula = C3H6O

B)To find molecular formula

Given that molar mass of caproic acid as 116g,

we will use our empirical formulae to find molecular formulae with the equation

(C3H6O)n= 116g/mol

12x3 + 1x6 + 1 x16= 58g/mol

58n= 116g/mol

n = 116/58= 2

= (C3H6O)2= C(3X2) H(6X2) O(1X2)

C6H1202--- MOLECULAR FORMULA

7 0

3 years ago

A reaction mechanism is defined as the sequence of reaction steps that define the pathway from reactants to products. Each step

olga55 [171]

Answer: (a) K *[A][B]^2

(b) The answer is B

Explanation:

Step1:A+B<--> C (fast)

Step2: B+C→D(slow)

Rate depends on slowest step.

so,

rate = k' [B][C] ...eqn 1

But C is intermediate.so use step 1

Since 1st step is an equilibrium,

Kc = [C] /[A][B]

so,

[C] = Kc [A][B] ...eqn 2

put eqn 2 in eqn 1

rate = k' *[B] * Kc [A][B]

= k'Kc*[A][B]^2

= K *[A][B]^2 {writing k'Kc = K}

Answer: K *[A][B]^2

Answer is B

Since rate depends on slowest step.

if slowest step is:

X2Y2+Z2→X2Y2Z+Z

then only,

rate= k[X2Y2][Z2]

Answer: B

6 0

3 years ago

What role does the sun play in the formation of rain

valkas [14]

Not my best subject, but I believe that the heat of the sun evaporates the water from other rain storms that had happened before. Once the water evaporates it gets formed into clouds (rain clouds) and after a while it get heavy or a bit cold so the cloud releases the water it held and the water being dropped is rain. I'm sorry if this is wrong this is all I can remember, but I believe it should be enough for elementary school.

7 0

4 years ago

Read 2 more answers

PLZ HELP!

Setler [38]

Answer:

The answer is RNA

Explanation:

Each sequence of three nucleotides, called a codon, usually codes for one particular amino acid. (Amino acids are the building blocks of proteins.) A type of RNA called transfer RNA (tRNA) assembles the protein, one amino acid at a time.

7 0

3 years ago

Read 2 more answers

2. Given the unbalanced equation:

zheka24 [161]

2 Na + 2 H2O → 2 NaOH + H2 (balanced equation)
The answer would be 2, since 2 in the coefficient of both Na and NaOH

7 0

3 years ago