Help!!!!!!! what is the rate of forward and reverse reactions

What is the molecular weight, density, and how many moles in

OverLord2011 [107]

Answer:

1) Molecular weight: 18g/mol

Density: at room temperature (25ºC) is 0.997g/mL

Moles: 0.55moles

2) Molecular weight: 182g/mol

Density: at room temperature (25ºC) is 1.11g/mL

Moles: $2.2x10^{-4}moles$

Explanation:

1) The molecular formula of water is $H_{2}O$ thus, the molecular weight is the sum of the weights of its atoms.

H: 1g/mol x 2 = 2g/mol

O: 16g/mol x 1 = 16g/mol

$H_{2}O$ : 2g/mol + 16g/mol = 18g/mol

The density (δ) of water at room temperature (25ºC) is 0.997g/mL

Therefore, the weight (m) of 1mL of water is:

m = δ.V = $0.997\frac{g}{mL}. 1mL = 0.997g$

Multiplying the mass by its molecular weight gives the number of moles:

$\frac{0.997g }{18g/mol} = 0.55 moles$

2) The molecular formula of benzophenone is $C_{13}H_{10}O$ thus, the molecular weight is the sum of the weights of its atoms.

C: 12g/mol x 13 = 156g/mol

H: 1g/mol x 10 = 10g/mol

O: 16g/mol x 1 = 16g/mol

$C_{13}H_{10}O$ : 156g/mol + 10g/mol + 16g/mol = 182g/mol

The density (δ) of water at room temperature (25ºC) is 1.11g/mL

Multiplying the mass by its molecular weight gives the number of moles:

$\frac{0.04g }{182g/mol} = 2.2x10^{-4}moles$

3 0

4 years ago

Read 2 more answers

Which of the following pairs of aqueous solutions would not produce a reaction when mixed? Select one: a. NaNO3 and CuCl2 b. Ba(

Gekata [30.6K]

Answer:

a. NaNO3 and CuCl2

Explanation:

The other 3 react as follows:

Ba(OH)2 and HNO3 ---> BaNO3 + H2O

CaCl2 + Na3PO4 ---> CaPO4 + NaCl

AgNO3 + HCl ---> AgCl + HNO3

7 0

3 years ago

Which best describes the total mass of a sample of water when it condenses

lubasha [3.4K]

Answer:

Its C I hopefully help you

4 0

3 years ago

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Relative humidity is described as: Group of answer choices a basically unused concept when it comes to weather topics. the amoun

Bad White [126]

Correct answer:

The relative humidity is best described as the amount of water vapor in the air at a given temperature expressed as a percentage of the water vapor capacity of the air.

What is relative humidity?

The ratio of the current absolute humidity to the highest absolute humidity is known as relative humidity (which depends on the current air temperature).

Water vapor is also measured by relative humidity, which is stated as a percentage but RELATIVE to the air's temperature. In other words, it is a comparison between the amount of water vapor that is actually present in the air and the maximum amount of vapor that is possible for the air at the current temperature.

With the same quantity of absolute/specific humidity, air will have a HIGHER relative humidity if it is cooler and a LOWER relative humidity if it is warmer because warm air may contain more water vapor (moisture) than cold air. The actual amount of moisture (absolute humidity) in the air is what we "feel" outside.

Learn more about relative humidity here,

brainly.com/question/14104185

#SPJ4

5 0

2 years ago

How is a mole ratio used in stoichiometry?

Svetach [21]

I mole ratio is used to convert the number of moles of one substance to number of moles of another substance.

5 0

3 years ago