Chemistry, 24.07.2019 21:30 knownperson233

In the reaction n2 + 3h2 ⇌ 2nh3, an experiment finds equilibrium concentrations of [n2] = 0.1 m, [h2] = 0.05 m, and [nh3] = 0.001 m. what is the equilibrium constant kc for this reaction? a. 0.08 b. 0.20 c. 5.0 d. 12.5

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The equilibrium constant Kc for this reaction is calculated as follows

from the equation N2 + 3H2 =2 NH3

qc = (NH3)2/{(N2)(H2)^3}

Qc is therefore = ( 0.001)2 /{(0.1) (0.05)^3} = 0.08

Answer from: vanessagomezcx

K_c = 0.08

Explanation: The given balanced equation is:

$N2+3H_2\rightleftharpoons 2NH_3$

equilibrium expression is written as:

$K_c=\frac{[NH_3]^2}{[N_2][H_2]^3}$

Equilibrium concentrations are given for products and reactants. Let's plug in the values.

$K_c=\frac{(0.001)^2}{(0.1)(0.05)^3}$

K_c = 0.08

So, the correct choice is A) 0.08.

Answer from: Quest

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

Write 15 uses of a mercury barometer along with its characterestics

Answer from: Quest

answer: $2c_5h_5+1fe\rightarrow 1fe(c_5h_5)_2$

the reaction is type of combination reaction.

explanation:

$? c_5h_5+? fe\rightarrow ? fe(c_5h_5)_2$

on the product side, there are 2 molecules of $c_5h_5$ bonded to fe which means one atom of fe are combined two molecules of $c_5h_5$ . so, balanced chemical equation becomes :

$2c_5h_5+1fe\rightarrow 1fe(c_5h_5)_2$

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.

$a+b\rightarrow ab$

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