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3 years ago

Bread rises due to the carbon producing during

1 answer:

7 0

CO2 is released by yeast during fermentation of the starches in the flour. It is considered fermentation (anaerobic respiration) as the bread is airtight and is kept in airtight environments meaning oxygen cannot take part in the reaction.

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What is the value of Keq for the reaction expressed in scientific notation? 1.6 ´ 10–5 6.2 ´ 10–4 6.2 ´ 104 1.6 ´ 105

vodka [1.7K]

The question is incomplete, the complete question is:

Consider the reaction:

$2NOCl\rightleftharpoons 2NO+Cl_2$

At equilibrium, the concentrations are as follows. [NOCl] = 1.4 × 10–2 M [NO] = 1.2 × 10–3 M [Cl2] = 2.2 × 10–3 M What is the value of Keq for the reaction expressed in scientific notation?

A) 1.6 × 10–5

B) 6.2 × 10–4

C) 6.2 × 10+4

D) 1.6 × 10+5

Answer: The correct option is A) $1.6\times 10^{-5}$

Explanation:

The equilibrium constant is defined as the ratio of the concentration of products to the concentration of reactants raised to the power of the stoichiometric coefficient of each. It is represented by the term $K_{eq}$

For the given chemical equation:

$2NOCl\rightleftharpoons 2NO+Cl_2$

The expression for equilibrium constant will be:

$K_{eq}=\frac{[NO]^2}{[Cl_2][NOCl]^2}$

Given values:

$[NO]=1.2\times 10^{-3}M$

$[Cl_2]=2.2\times 10^{-3}M$

$[NOCl]=1.4\times 10^{-2}M$

Putting values in above expression, we get:

$K_{eq}=\frac{(1.2\times 10^{-3})^2\times (2.2\times 10^{-3})}{(1.4\times 10^{-2})^2}\\\\K_{eq}=1.6\times 10^{-5}$

Hence, the correct option is A) $1.6\times 10^{-5}$

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3 years ago

According to the kinetic theory of motion everything is made of particles and all particles are?

melisa1 [442]

All particles are in motion.

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4 years ago

In an experiment what unit of measurement would you use to demonstrate the law of conservation of mass

Ostrovityanka [42]

Answer:

Joule

Explanation:

When we think about the law of conservation of mass, we tend to think about the actual mass of objects. However we forget that energy can be turned into mass, and in turn, mass can be turned into energy. Sometimes there is a loss in mass, but energy is released into the environment which we can always see or measure. So therefore the most inclusive unit of measure to use when referring to the law of conservation of mass is in fact the unit for energy, the joule.

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3 years ago

How much garbage does a average American generate?

ale4655 [162]

Well the average American makes about 29 pounds a week so, 52x29= 1508. the average American generates about 1508 pounds a year.

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3 years ago

Acidic soil with a surface of decayed pine needles describes the

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Allelopathy, the pine needles make the ground more acidic so weeds cannot grow and steal nutrients the tree needs

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