Does 1-propanol expected to have a higher boiling point than ethyl methyl ether

Answers

Answer 1

Answer: Indeed it is. Reasons being that the hydrogen bonds in the 1-propanol is difficult to break. Hence, more energy or heat is needed to be applied. Ethyl methyl ether on the other hand doesn't have hydrogen bonds and that explains why it has a lower boiling point.
*try drawing their structural formula, from there you'll be able to differentiate better*

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The mass of a substance is 10 grams. In magnitude, the volume is three more than the density, which is measured in g/cm3. What is the density of this substance?

The value of the equilibrium constant for the combination of nitrogen and oxygen to make NO is 2 x 10-9. What does this tell you about the concentrations of materials in the equilibrium mixture?

Answers

Answer: The reaction must proceed in the reverse direction.

Explanation:

$K_p$ is the constant of a certain reaction at equilibrium while $Q_p$ is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

For the given chemical reaction:

$N_2(g)+O_2(g)\rightleftharpoons 2NO(g)$

The expression of $K_p$ for above equation follows:

$K_p=((p_(NO))^2)/(p_(N_2)* p_(O_2))$

We are given:

$K_p=2* 10^(-9)$

There are 3 conditions:

When $K_(p)>1$ ; the reaction is product favored.

When $K_(p)<1$ ; the reaction is reactant favored.

When $K_(p)=1$ ; the reaction is in equilibrium.

As, $K_p<1$ , the reaction will be favoring reactant side or the reaction must proceed in the reverse direction.

Hence, the reaction must proceed in the reverse direction.

The total number of sodium atoms in 46.0 grams of solution is?

Answers

First step, is to find the Molar Mass.
If you go to the periodic table, the Molar Mass of the Sodium Na is 23g/mol

Second Step, you convert from grams to moles.
number of Mole = mass of sodium / molar mass = $(46)/(23) = 2 mol$

Third Step, you find the number of atoms.
As We know, Avogadro said that the number of atoms in 1 mole is about $6.022 * 10^(23)$ .
You use the Rule of three and you find the number of atoms!
1 mole = $6.022 * 10^(23)$ atoms
2 mole = x atomes
x = 2 * ( $6.022 * 10^(23)$ )
x= $12.044 * 10^(23)$ atomes

So, there is $12.044 * 10^(23)$ atoms of Sodium Na in 46g of Solution.

Hope this Helps! :D

molar mass Na = 23g/mol
46g = 456/2 = 2mol
1mol = 6.022*10^23 atoms
2mol = 2*6.022*10623
= 1.204*10^24 atoms

The capacity of a muscle to continue contracting over a period of time without fatigue is called: A. muscular strength.
B. muscular endurance.
C. cardiovascular endurance.
D. power.

Answers

B. muscular endurance

The capacity of a muscle to continue contracting over a period of time without fatigue is called muscular endurance.
NOT:
A. muscular strength.
C. cardiovascular endurance.
D. power.

Boron occurs naturally as two isotopes. What is the difference between these isotopes? a)They have different numbers of electrons and different charges.
b)They have different numbers of neutrons and different charges.
c)They have different numbers of protons and different mass numbers.
d)They have different numbers of neutrons and different mass numbers.

Answers

atoms are made of 3 types of subatomic particles that are electrons, protons and neutrons.
the number of protons in the atom is called the atomic number. the atomic number is characteristic of the element.
the mass number is the sum of the number of protons and neutrons. Since protons and neutrons both have similar masses and they are located in the nucleus, the mass of the atom is the sum of protons and neutrons.
Isotopes are when 2 atoms of the same element have different number of neutrons. Therefore atomic number is the same but mass number is different as the number of neutrons vary.

correct answer for the difference between isotopes is
d)They have different numbers of neutrons and different mass numbers.

Boron occurs naturally as two isotopes that is they have the same number of protons and different numbers of neutrons with different atomic charges. Option D is correct.

What are isotopes?

These are the variations of elements having the same number of protons and electrons and different numbers of neutrons. As they are neutral in charge and their mass is totally negligible as compared to the mass of proton as they both are located at the center of the atom

The center of the atom is the nucleusas there are some more species of element isobars isotones isoelectronic. Isobars are those species that have the same neutronic numbers with different photonic and electronic numbers

The isotopes of boron are boron10, boron12, boron14, etc. .Carbon is another compound that is having 3 isotopes carbon12 carbon13, and caobon14. But mostly their properties are the same with a little difference between them

Therefore, the correct option is D.

Learn more about isotopes, here:

brainly.com/question/26637586

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Determine the number of atoms in 25.0 grams of bromine, Br. (The mass of one mole of bromine is 79.90 g.)

Answers

Answer: 1,88×10²³ atoms of Br in 25g of Br

Explanation:

25g Br

1 mol of Br =79,9g Br

Number of Avogadro: 6,022×10²³ = 1 mol

25gBr× 1molBr/79,9gBr =

6,022×10²³ atoms of Br/1 mol Br =

1,88×10²³ atoms of Bromine

Which compound is an electrolyte?
(1) C6H12O6 (3) CaCl2
(2) CH3OH (4) CCl4

Answers

I think the correct answer is option 3. CaCl2 is the compound that is an electrolyte when dissolved in water. An electrolyte is a substance that conducts electricity in solution. Calcium Chloride when in solution dissociates into ions which allows the flow of current in the solution.

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