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3 years ago

PLEASE HELP!!!!!!!!!!!!!

Chemistry

2 answers:

lions [1.4K]3 years ago

8 0

Answer:

Pd(O2C2H3)2

Explanation:

Percentage composition of elements in the compound:

Pd= 47.40%

O=28.50%

C=21.40%

H= 2.69%

Molar mass of each element

Pd= 106g/mol

O= 16g/mol

C= 12g/mol

H= 1g/mol

Step 1

Find the moles of each element in 100g sample using the formula

no. of moles(n)=mass/molar mass

For Pd: 47.40g/106g/mol

n= 0.447 moles

For O: 28.50/16

n= 1.78 moles

For C: 21.40/12

n= 1.783 moles

For H: 2.69/1

n= 2.69moles

Step 2

Now divide the no. of moles separately by the smallest number of moles. Smallest number of moles is 0.447

Pd= 0.447/0.447

= 1

O= 1.78/0.447

= 3.9=4

C= 1.78/0.447

= 3.9=4

H= 2.69/0.447

= 6

Hence empirical formula is PdO4C4H6

The probable molecular formula is $Pd(O_{2}C_{2}H_{3})2$

Ghella [55]3 years ago

3 0

Answer:

Pd(O2CCH3)2

Explanation:

Below is an attachment containing the solution

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3 years ago

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nekit [7.7K]

Answer:

a) Q = 6.1875x10⁻³

b) The direction of the reaction is to form the products.

c) [Cl₂]e = 0.094 M

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[NOCl]e = 0.140 M

Explanation:

a) Q is the reaction quotient, and for a generic reaction aA + bB ⇄ cC + dD it is

$Q = \frac{[C]^cx[D]^d}{[A]^ax[B]^b}$

Which is the same equation for Kc, but in Kc expressions, the concentrations are in the equilibrium. Q is calculated at any time. So, for the reaction given

2NOCl(g) ⇄ 2NO(g) + Cl2(g)

$Q = \frac{[Cl2]x[[NO]^2}{[NOCl]^2}$

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Q = (0.044)x(0.090)²/(0.240)²

Q = 6.1875x10⁻³

b) Q < Kc, which means that there are fewer products to what are needed to the equilibrium. So the direction of the reaction is to form the products.

2NOCl(g) ⇄ 2NO(g) + Cl2(g)

0.240 0.090 0.044 Initial

-2x +2x +x Reacts (stoichiometry is 2:2:1)

0.240-2x 0.090+2x 0.044+x Equilibrium

$Kc = \frac{(0.044+x)x(0.090+2x)^2}{(0.240 - 2x)^2}$

$1.86x10^{-1} = \frac{(0.044+x)*(8.1x10^{-3} +0.36x + 4x^2)}{(0.0576 - 0.96x +4x^2)}$

3.564x10⁻⁴+0.01584x+0.176x²+8.1x10⁻³x+0.36x²+4x³ = 0.010714-0.17856x+0.744x²

4x³ - 0.208x² + 0.2025x - 0.01036 = 0

Solving this third grade equation in a computer program:

x = 0.05 M

So:

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7 0

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Answer:

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Explanation:

final answer. C

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Answer:

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3 years ago