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4 years ago

NEED THIS NOW PLZ!!!

Chemistry

2 answers:

Norma-Jean [14]4 years ago

7 0

Answer:

Centimeters per minute

Explanation:

Speed measurement is formated as [distance] per [time], like miles per hour.

B and C are incorrect because they are [time] per [distance]

A is incorrect because it is [time] per [time]

vitfil [10]4 years ago

7 0

Answer : The correct option is (D) Centimeters per minute

Explanation :

Speed : It is defined as the distance traveled by the object per unit time.

The unit of distance are, kilometer, meter, centimeter etc.

The unit of time are, minute, second, hour etc.

Formula used :

$Speed=\frac{Distance}{Time}$

From the given options, the correct measurement of speed is centimeters per minute.

Hence, the correct option is (D) Centimeters per minute

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Consider the reaction.

vovangra [49]

Answer: The value of Keq for the reaction expressed in scientific notation is $1.6\times 10^{-5}$

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.

For the given chemical reaction:

$2NOCl(g)\rightarrow 2NO(g)+Cl_2(g)$

The expression for $K_{eq}$ is written as:

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

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

$K_{eq}=1.6\times 10^{-5}$

The value of Keq for the reaction expressed in scientific notation is $1.6\times 10^{-5}$

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3 years ago

What is transpiration?

kiruha [24]

It’s c it’s a process in which plants releases water through their leaves back into the air

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3 years ago

The empirical formula of styrene is CH; its molar mass is 104.1 g/mol. What is the molecular formula of styrene?

BlackZzzverrR [31]

The molecular formula of styrene is B) C8H8.

Styrene is an organic compound with a chemical formula of C6H5CH=CH<span>2</span>

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3 years ago

Please help lots of points

vekshin1

Answer:

The equilibrium vapour pressure of a liquid is the pressure exerted by a vapour in a closed vapour and gas system which is in thermal equilibrium.

It is measured using a simple manometer

Explanation:

When liquid and vapour are in a closed container, the molecules of the liquid and vapour at a certain temperature, will attain thermal equilibrium. this means that there is no net transfer of heat between the bodies. The pressure exerted by the vapour on the liquid at this point is called the equilibrium vapour pressure.

To measure the equilibrium vapour pressure, the instrument used is a manometer. To use this, a sample of the liquid is dropped in a sealed flask connected to a manometer, and the increase in the pressure of the system is monitored as the fluid evaporates. This increase in pressure is known as the vapour pressure.

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3 years ago

The equilibrium-constant expression depends on the ________ of the reaction. Group of answer choices temperature stoichiometry m

slavikrds [6]

Answer:

temperature and mechanism

Explanation:

Arrhenius equation gives us the idea about the factors affecting equilibrium constant.It is given as:

where k=equilibrium constant

A=pre-exponential factor

$E_{a}$ =Activation energy

T=temperature

R=Universal gas constant

<h3>It is clear that k depends only on temperature and activation energy.</h3>

Activation energy of a reaction is different for different mechanisms or pathways.Hence k depends on both temperature and mechanism.

7 0

3 years ago