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andrey2020 [161]
3 years ago
14

The statement that percent yield can never be greater than theoretical yield is another example of the ________.

Chemistry
1 answer:
Gnom [1K]3 years ago
3 0
We can rephrase the statement with a little more specificity in order to understand the answer here.

The mass of the products can never be more than the The mass that is expected.
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4
Stolb23 [73]

Answer:

Um english please I don’t know Jewish

Explanation:

6 0
3 years ago
For the reaction, 2SO2(g) + O2(g) <--> 2SO3(g), at 450.0 K the equilibrium con­stant, Kc, has a value of 4.62. A system wa
Nady [450]

Answer:

To the left.

Explanation:

Step 1: Write the balanced reaction at equilibrium

2 SO₂(g) + O₂(g) ⇄ 2 SO₃(g)

Step 2: Calculate the reaction quotient (Qc)

Qc = [SO₃]² / [SO₂]² × [O₂]

Qc = 0.254² / 0.500² × 0.00855

Qc = 30.2

Step 3: Determine in which direction will proceed the system

Since Qc > Kc, the system will shift to the left to attain the equilibrium.

4 0
3 years ago
A compound has a molar mass of 100 g/mol and the percent composition (by mass) of 65.45% C, 5.45% H, and 29.09% 0. Determine the
coldgirl [10]

Answer:

B) C3H3O and C6H6O2

Explanation:

Given data:

Molar mass of compound = 100 g/mol

Percentage of hydrogen = 5.45%

Percentage of carbon = 65.45%

Percentage of oxygen = 29.09%

Empirical formula = ?

Molecular formula = ?

Solution:

Number of gram atoms of H = 5.45 / 1.01 = 5.4

Number of gram atoms of O = 29.09/ 16 = 1.8

Number of gram atoms of C = 65.45 / 12 = 5.5

Atomic ratio:

            C                      :      H            :         O

           5.5/1.8              :     5.4/1.8     :        1.8/1.8

            3                      :        3          :        1

C : H : O = 3 : 3 : 1

Empirical formula is C₃H₃O.

Molecular formula:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

Empirical formula mass = 12×3 + 1.01 ×3 + 16×1 = 55.03  

n = 100 / 5503

n = 2

Molecular formula = n (empirical formula)

Molecular formula = 2 (C₃H₃O)

Molecular formula = C₆H₆O₂

3 0
3 years ago
Which of these represents a chemical change?
Art [367]
Option C. A compound being separated into 2 elements represents a chemical change.
8 0
3 years ago
Read 2 more answers
Meanings of Ka and pKa (a) Does a strong acid have a greater or lesser tendency to lose its proton than a weak acid? (b) Does th
Sunny_sXe [5.5K]

Answer:

(a) A strong acid has a greater tendency to lose its protons.

(b) A strong acid has a higher Ka than a weak acid.

(c) A strong acid has a lower pKa than a weak acid.

Explanation:

A strong acid has the ability to completely transfer their protons to the water, making a complete dissociation. Instead, a weak acid only dissociates partially, how much it dissociates depends on the acid dissociation constant (Ka).

The weak acids always are in equilibrium, and the equilibrium depends on the acid dissociation constant.

HA + H_{2}O ⇄ A^{-} + H_{3}O^{+}

Thus, a stronger acid with a bigger Ka produces more dissociation and a higher concentration of protons.

The equation that defines pKa is:

pKa = -Log (Ka)

Therefore, a higher pKa means a lower Ka and also a weaker acid.

7 0
3 years ago
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