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kirill [66]
2 years ago
5

Which statements about scientific explanations are true? I. Scientific explanations must prove that a hypothesis is true. II. Sc

ientific explanations should be based on evidence or data. III. Scientific explanations must have logical and consistent arguments. IV. Scientific explanations should use scientific principles, models, and theories. A. I, II, III and IV B. I, II and III only C. II, III and IV only D. II and III only
Chemistry
1 answer:
Oksana_A [137]2 years ago
4 0

Answer:

Statement about scientific explanations is true :

C. II, III and IV only

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Answer: The partial pressure of Cl_2 is 1.86 atm

Explanation:

Equilibrium constant 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

The given balanced equilibrium reaction is,

                            PCl_5(g)\rightleftharpoons PCl_3(g)+Cl_2(g)

Pressure at eqm.     0.973 atm                 0.548atm      x atm

The expression for equilibrium constant for this reaction will be,

K_c=\frac{(p_{PCl_3}\times (p_{Cl_2})}{(p_{PCl_5})}

Now put all the given values in this expression, we get :

1.05=\frac{(0.548)\times (x)}{(0.973)}

By solving the term 'x', we get :

x = 1.86 atm

Thus, the partial pressure of Cl_2 is 1.86 atm

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3 years ago
One difference between mixtures and pure substances is that A) mixtures can be physically separated. B) mixtures are made of one
Alborosie
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3 years ago
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The gravitational force is 10 N down, and the force of air resistance is 1 N up. What is the net force?
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How many grams are in 10.25 moles of zinc chromate?
Kobotan [32]

Answer:

1859.4 g of ZnCrO₄ in 10.25 moles

Explanation:

First of all, we determine the molecular formula of the compound:

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Let's apply this conversion factor: 10.25 mol . 181.41 g/mol = 1859.4 g

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I think the ph range would be 3
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