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3 years ago

15

Consider the following reversible reaction.

2 answers:

Elodia [21]3 years ago

7 0

Answer:

C on edge

Explanation:

got it correct :)

dmitriy555 [2]3 years ago

6 0

Answer:

Keq = [CO₂]/[O₂]

Explanation:

Step 1: Write the balanced equation for the reaction at equilibrium

C(s) + O₂(g) ⇄ CO₂(g)

Step 2: Write the expression for the equilibrium constant (Keq)

The equilibrium constant is equal to the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients. It only includes gases and aqueous species. The equilibrium constant for the given system is:

Keq = [CO₂]/[O₂]

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Write a condensed structural formula for the repeat unit of the Kevlar molecule

shusha [124]

Explanation:

Kevlar is a fiber which is used in making of bullet proof vests and armors. It is a co-polymer which is formed by condensing two organic molecules 1,4-phenylene-diamine and terephthaloyl chloride.

$NH_2C_6H_4NH_2+Cl-(CO)-C_6H_4-(CO)-Cl\xrightarrow[-2HCl]{ }$

$NH_2-C_6H_4-NH-CO-C_6H_4-COOH$

For Structure refer to image attached.

4 0

3 years ago

Read 2 more answers

Click in the answer box to activate the palette. Use the half-reaction method to balance the following equation in acidic soluti

Rzqust [24]

Answer:

The balanced reaction in the acidic medium is:

$2MnO4^-+3CN^-+2H^+\rightarrow 2MnO_2+H_2O+3CNO^-$

Explanation:

$CN^- + MnO4^-\rightarrow CNO^- + MnO_2$

1) $CN^-\rightarrow CNO^-$ ( oxidation)

Balance oxygen by adding water :

$CN^-+H_2O\rightarrow CNO^-$

Now , balance hydrogen by adding hydrogen ions on the side where hydrogen are less.

$CN^-+H_2O\rightarrow CNO^-+2H^+$

Add electrons to balance charge where positive charge is more.

$CN^-+H_2O\rightarrow CNO^-+2H^++2e^-$ ..[1]

2) $MnO4^-\rightarrow MnO_2$ (reduction)

Balance oxygen by adding water :

$MnO4^-\rightarrow MnO_2+2H_2O$

Now , balance hydrogen by adding hydrogen ions by adding them on the side where hydrogen are less.

$MnO4^-+4H^+\rightarrow MnO_2+2H_2O$ ..[2]

Add electrons to balance charge where positive charge is more.

$MnO4^-+4H^++3e^-\rightarrow MnO_2+2H_2O$ ..[2]

3 × [1] + 2 × [2]

The balanced reaction in the acidic medium is:

$2MnO4^-+3CN^-+2H^+\rightarrow 2MnO_2+H_2O+3CNO^-$

5 0

3 years ago

A contains 2.60g of impure h2so4 in 5oocm³ of a solution 5.30g of na2co3 in 1.00dm³ of solution

Tatiana [17]

Answer: a. 0.05mol/dm3

bi. 0.045mol/dm3

bii. 4.41g/dm3

c. 84.8%

Explanation:Please see attachment for explanation

3 0

3 years ago

The unit "troy ounce" is often used for precious metals such as gold (Au) and platinum (Pt) (1 troy ounce= 31.103 g). (a) A gold

frez [133]

Answer:

Explanation:

a) 1 troy ounce is equal to 31.103 g

2.41 troy ounce is equal to 2.41 x 31.103 g

= 74.958 g

b) 1 ounce = 1 / 16 lb = 1/16 x 453.6 g = 28.35 g.

1 troy ounce = 31.103 g

so 1 troy ounce is heavier than 1 ounce.

8 0

3 years ago

Question 33 Saved

Tatiana [17]

Answer:

The third option

Explanation:

If people have found more volcanic rock layers in the past that would mean that volcanic activity was more common in the past.

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3 years ago