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Mrrafil [7]
3 years ago
12

The empirical formula for two compounds that have very different properties (one tastes very sour and the other very sweet) is c

h2o. if the molar mass of compound a is 60.05 g/mol and compound b is 180.16 g/mol, what are the molecular formulas for these compounds, respectively?
Chemistry
2 answers:
ss7ja [257]3 years ago
6 0

Answer: Molecular formula for compound a: C_2H_4O_2

Molecular formula for compound b: C_6H_{12}O_6

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

For empirical formula of CH_2O, empirical weight is =1\times 12+2\times 1+1\times 16=30g

To calculate the molecular formula.:

1. For compound a:

n=\frac{\text{Molecular weight}}{\text{Equivalent weight}}=\frac{60.05}{30}=2

The molecular formula will be=2\times CH_2O=C_2H_4O_2

2. For compound b:

n=\frac{\text{Molecular weight}}{\text{Equivalent weight}}=\frac{180.16}{30}=6

The molecular formula will be=6\times CH_2O=C_6H_{12}O_6

DiKsa [7]3 years ago
3 0

I believe that the choices for this question are:

C2H4O2, C4H8O4 <span>
CH2O, C6H12O6 
C3H6O3, C6H12O6 
C2H4O2, C6H12O6 </span>

 

The answer to this based on the molar masses given is:

C2H4O2, C6H12O6 

 

To prove calculate the molar mass:

C2H4O2 = 2*12 + 4*1 + 2*16 = 60

C6H12O6 = 6*12 + 12*1 + 6*16 = 180

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hat is the pressure of CO(g) in equilibrium with the CO2(g) and O2(g) in the atmosphere at 25 ????C? The partial pressure of O2(
Lubov Fominskaja [6]

Answer:

The partial pressure of CO is 5.54x10⁻⁴⁹atm. You shouldn't worry because it is very low pressure

Explanation:

First, the balanced reaction is:

CO + 1/2O₂ → CO₂

The energies of formation are:

ΔG(CO)=-137.168kJ/mol

ΔG(O₂)=0

ΔG(CO₂)=-394.359kJ/mol

The energy of the reaction is:

delta-G_{reaction} =delta-G_{CO_{2} } -(delta-G_{CO} +1/2delta-G_{O_{2} } )\\delta-G_{reaction}=-394.359-(-137.168+0)=-257.191kJ/mol

The expression for calculate the partial pressure of CO is:

p_{CO} =\frac{p_{CO2} }{p_{O_{2} }^{1/2}*exp^{-\frac{delta-G}{RT} }   } \\p_{CO}=\frac{3x10^{-4} }{0.2^{1/2}*exp(-\frac{-257.191*1000}{8.314*298} ) } \\p_{CO}=5.54x10^{-49} atm

5 0
3 years ago
Science can best be described as
Savatey [412]
A way of building knowledge about the world around us through observation and experimentation.
8 0
2 years ago
In two or more complete sentences, develop a logical argument to either support or refute the following statement. Be sure to pr
Yuri [45]

We use logic every day to figure out test questions, plan our budgets, and decide who to date. We borrow from the vocabulary of logic when we say, "Brilliant deduction" or even "I don't want to argue about it." In the study of logic, however, each of these terms has a specific definition, and we must be clear on these if we are to communicate.

Vocabulary

Proposition --

T or F in an argument, but not alone. Can be a premise or conclusion. Is not equal to a sentence.

Premise --

Proposition used as evidence in an argument.

Conclusion --

Proposition used as a thesis in an argument.

Argument --

A group of propositions of which one is claimed to follow from the others.

Induction --

A process through which the premises provide some basis for the conclusion

Deduction --

A process through which the premises provide conclusive proof for the conclusion.

Argument Indicators: Premise Indicators: Conclusion Indicators:

should

must

ought  

necessarily

since  

because

for  

as

inasmuch as  

for the reason that

first ...

therefore

hence

thus

so

consequently  

it follows that  

one may infer

one may conclude

When dealing with persuasive writing, it will be helpful for you to outline the argument by premises and conclusions. By looking at the structure of the argument, it is easy to spot logical error.

Universities are full of knowledge. The freshmen bring a little in, and the seniors take none away, and knowledge accumulates.

-- Harvard President A. L. Lowell

Premise 1

Premise 2

Premise 3

Conclusion Freshmen bring a little (knowledge) in

Seniors take none away

Knowledge accumulates

Universities are full of knowledge

Example 2

(Here, the conclusion of one argument is used as a premise in another. This is very common.)

Even though there may be a deceiver of some sort, very powerful and very tricky, who bends all his efforts to keep me perpetually deceived, there can be no slightest doubt that I exist, since he deceives me; and let him deceive me as much as he will, he can never make me be nothing as long as I think I am something. Thus, after having thought well on this matter, and after examining all things with care, I must finally conclude and maintain that this proposition: I am, I exist, is necessarily true every time that I pronounce it or conceive it in my mind.

-- Rene Descartes, *Meditations*

Argument 1 Premise 1:

Conclusion of Argument 1

Argument 2 Premise 1:

Conclusion:

To be deceived ... I must exist

When I think that I exist I cannot be  

deceived about that

I am, I exist, is necessarily true ... .

Exercises

Find the Arguments and Outline them in These Statements:

1. Ask the same for me, for friends should have all things in common.

-- Plato, Phaedrus

2. Matter is activity, and therefore a body is where it acts; and because every particle of matter acts all over the universe, every body is everywhere.

-- Collingwood, The Idea of Nature

3. The citizen who so values his "independence" that he will not enroll in a political party is really forfeiting independence, because he abandons a share in decision©making at the primary level: the choice of the candidate.

-- Felknor, Dirty Politics

Reaching Logical Conclusions

This article is reprinted from pages 78-79 of Pearson-Allen: Modern Algebra , Book One. In the book it is one of several between-chapter articles that add interest and provike thought on subjects related to the topics discussed in the text.

Consider the two statements:

1. Any member of a varsity squad is excused from physical education.

2. Henry is a member of the varsity football squad.

Our common sense tells us that if we accept these two statement as true, then we must accept the following third statement as true:

3. Henry is excused from physical education.

We say that the third statement follows logically from the other two.

In drawing logical conclusions it does not matter whether the statements we accept as true are reasonable or sensible. This is because we depend entirely upon the form of the statements and not upon what we are talking about. Thus, if we accept the following statements as true:

1. All whales are mammals;  

2. All mammals are warm-blooded animals;  

3. All warm-blooded animals are subject to colds;

then we must conclude that


8 0
3 years ago
Which of these elements reacts rapidly when dropped in water?
seraphim [82]
Technically it's grp 1 elements...the answer is ribidium Rb
8 0
3 years ago
Read 2 more answers
If 75 grams of oxygen react, how many grams of aluminum are required?
german

Answer:

84.24 g

Explanation:

Given data:

Mass of oxygen = 75 g

Mass of Al required to react = ?

Solution:

Chemical equation:

4Al + 3O₂     →   2Al₂O₃

Number of moles of oxygen:

Number of moles = mass/ molar mass

Number of moles = 75 g/ 32 g/mol

Number of moles = 2.34 mol

Now we will compare the moles of oxygen with Al.

                          O₂         :          Al

                           3          :             4

                        2.34        :         4/3×2.34 = 3.12 mol

Mass of Al required:

Mass = number of moles × molar mass

Mass = 3.12 mol × 27 g/mol

Mass = 84.24 g

5 0
2 years ago
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