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defon
3 years ago
8

Consider this reaction: 3Fe2O3(s) + CO(g) → 2Fe3O4(s) + CO2(g). Which of the following would increase the rate of the reaction?

a. adding the Fe3O4 b. decreasing the temperature c. increasing the surface area of Fe2O3 d. increasing the volume of the reaction vessel
Chemistry
2 answers:
morpeh [17]3 years ago
8 0

The balanced reaction is 3Fe₂O₃(s) + CO(g) → 2Fe₃O₄(s) + CO₂(g). Rate of reaction is decrease in the concentration of reactant or increase in the concentration of product with unit time. To increase rate of any reaction either reactant concentration is to be increased. Here (a)  addition of Fe₃O₄ will decrease the reaction rate, rather it facilitates the reaction  to move backward direction, (b) temperature effect is not clear as it is not mentioned whether the reaction is exothermic or endothermic, (c) if surface area of Fe₂O₃ is increased then more CO molecules can react with more Fe₂O₃ molecules at a time, therefore, reaction rate will increase, (d) increase in the volume of reaction vessel will not affect rate of reaction because reactant and product both have same volume of gaseous compound CO and CO₂ respectively.

So, increase in surface area of Fe₂O₃ would increase rate of the reaction.

murzikaleks [220]3 years ago
6 0
<h3><u>Answer;</u></h3>

C. increasing the surface area of Fe2O3

<h3><u>Explanation;</u></h3>
  • The rate of reaction refers to the speed at which products are formed from reactants.
  • The rate of any chemical reaction depends on a number of factors which include, surface area, temperature, concentration of reactants among others.
  • <em><u>When solids and liquids react, increasing the surface area of the solid will increase the rate of reaction. Thus, decrease in the size of particles causes an increase in the total surface area of the solid and therefore increasing the rate of reaction.</u></em>
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mihalych1998 [28]

Answer:

C6H15

Explanation:

First, we calculate the empirical formula as follows:

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H = 8.67 g

We convert each mass value to mole by dividing each element by its molar mass (C = 12g/mol, H = 1g/mol)

C = 41.33g ÷ 12g/mol = 3.44mol

H = 8.67g ÷ 1g/mol = 8.67mol

Next, we divide each mole value by the smallest (3.44mol)

C = 3.44mol ÷ 3.44mol = 1

H = 8.67mol ÷ 3.44mol = 2.52

We multiply this ratio by 2 to get a simple whole number ratio

C = 1 × 2 = 2

H = 2.52 × 2 = 5.04

Based on this, the whole number ratio of C and H is 2:5, hence, the empirical formula is C2H5.

The molecular mass of the compound is given as 87.18 g/mol, hence, the molecular formula is calculated as follows:

(C2H5)n = 87.18

[12(2) + 1(5)]n = 87.18

[24 + 5]n = 87.18

(29)n = 87.18

n = 87.18 ÷ 29

n = 3.006

Approximately to whole number, n = 3

Hence, the molecular formula of the compound is [C2H5]3

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4 0
2 years ago
A 200. gram sample of a salt solution contains 0.050 grams of NaCl. What is the concentration of the
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Answer:

2.5 × 10² ppm

Explanation:

Step 1: Given data

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Step 2: Convert 0.050 g to μg

We will use the conversion factor 1 g = 10⁶ μg.

0.050 g × 10⁶ μg/1 g = 5.0 × 10⁴ μg

Step 3: Calculate the concentration of NaCl in ppm

The concentration of NaCl in ppm is equal to the micrograms of NaCl per gram of the sample.

5.0 × 10⁴ μg NaCl/200. g = 2.5 × 10² ppm

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3 years ago
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Answer:

The electric force between them decreases

Explanation:

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F=\dfrac{kq_1q_2}{r^2}

Where

r is the distance between charges

If the distance between the charges is increased, the electric force gets decreased as there is an inverse relation between force and distance.

Hence, the correct option is (c) "The electric force between them decreases"

7 0
2 years ago
Hydrogen sulfide burns form sulfur dioxide:
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Answer: 404.04 kJ.

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Kinetic Energy of Gas Formula Questions:

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Answer: The average translational kinetic energy of a molecule of an ideal gas can be found using the formula:

The average translational kinetic energy of a single molecule of an ideal gas is  (Joules).

2) One mole (mol) of any substance consists of  molecules (Avogadro's number). What is the translational kinetic energy of  of an ideal gas at ?

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