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lakkis [162]
3 years ago
15

A student performs an experiment where gas is collected over water in an upside down graduated cylinder. If the atmospheric pres

sure is 745 mmHg and the level of water in the graduated cylinder is 14.4 cm higher than the level of the water exposed to the atmosphere, what is the total pressure of gases inside the graduated cylinder? Enter your answer numerically in units of mmHg.
Chemistry
1 answer:
Furkat [3]3 years ago
4 0

Answer:

601mmhg

Explanation:

Pgas = Patm - hρg

Height of water = 14.4cm

Convert to mm

1 cm = 10mm

14.4 cm =

= 14.4cm × 10mm

= 144mm

hpg = 144 mmhg

Ptotal = Patm - hog

= 745mmhg - 144 mmhg

= 601mmhg

The total pressure of gases inside the graduated cylinder = 601mmhg

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Which statement describes J.J. Thomson’s plum-pudding model of the atom?
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Which two changes would increase the gravitational force between two
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B. Increase the mass of one of the objects.

E. Decrease the distance between the objects.

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4 0
3 years ago
If the reaction N2 (g) + 3 H2 (g) --> 2 NH3 (g) has the concentrations 1.1 M for nitrogen, 0.75 M for hydrogen and 0.25 M fo
Luba_88 [7]

<u>Answer:</u> The value of K_c is 0.136 and is reactant favored.

<u>Explanation:</u>

Equilibrium constant in terms of concentration is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as K_{c}

For the chemical reaction between carbon monoxide and hydrogen follows the equation:

N_2(g)+3H_2(g)\rightleftharpoons 2NH_3(g)

The expression for the K_{c} is given as:

K_{c}=\frac{[NH_3]^2}{[N_2][H_2]^3}

We are given:

[NH_3]=0.25M

[H_2]=0.75M

[N_2]=1.1M

Putting values in above equation, we get:

K_c=\frac{(0.25)^2}{1.1\times (0.75)^3}

K_c=0.135

There are 3 conditions:

  • When K_{c}>1; the reaction is product favored.
  • When K_{c}; the reaction is reactant favored.
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For the given reaction, the value of K_c is less than 1. Thus, the reaction is reactant favored.

Hence, the value of K_c is 0.136 and is reactant favored.

4 0
3 years ago
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