Of these four liquids, which is the most viscous? A. H2O. . B. CCl4. . C. C2H12O6. . D. Hg

Answers

Answer 1

Answer: Of these four liquids, which is the most viscous?

Answer: Out of all the options presented above the one that is the most viscous liquid is answer choice D) Hg. Mercury has a Dyn. viscosity of 1.55 mPa·s. This liquid is often used for thermometers, barometers, manometers and many other devices.

I hope it helps, Regards.

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What would indicate that a physical change takes place when copper is drawn into wire?

Answers

A physical change takes place when copper is drawn into wire when the wire can be made into smaller in diameter but longer in length tubes. This is a physical change becasue the copper is just molded into wire without any application of any substance.

What mass of Na2SO4is needed to make 2.5 L of 2.0 Msolution? (Na = 23 g; S = 32 g; O = 16 g)a.356 g
b.284 g
c.710 g
d.178 g

Answers

Answer:

mass (g) needed = 710.2 grams Na₂SO₄(s)

Explanation:

Needed is 2.5 Liters of 2.0M Na₂SO₄; formula wt Na₂SO₄ = 142.04g/mol.

mass (grams) of Na₂SO₄(s) = Molarity needed x Volume needed in Liters x Formula Wt of solute

mass (grams) of Na₂SO₄(s) = (2.5L)(2.0M)(142.04g/mol) = 710.2 grams Na₂SO₄(s)

Mixing: Transfer 710.4 grams Na₂SO₄ into mixing vessel and add water-solvent up to but not to exceed 2.5 Liters total volume. Mix until dissolved.

Gives 2.5 Liters of 2.0M Na₂SO₄(aq) solution.

Which of the following would you expect to have the highest value for entropy? CO2 (s)

H2O (s)

CO2 (g)

H2O (l)

Answers

Chemistry cool

CO2 (g) is your answer

hey there i see you need help well i am here to do just that

CO2 (g) is the correct answer

hope this helps

37 Which general trends in first ionization energy and electronegativity values are demonstrated by Group 15 elements as they are considered in order from top to bottom?(1) The first ionization energy decreases and the electronegativity decreases.(2) The first ionization energy increases and the electronegativity increases.
(3) The first ionization energy decreases and the electronegativity increases.
(4) The first ionization energy increases and the electronegativity decreases.

Answers

Correct answer: The first ionization energy decreases and the electronegativity decreases.

Reason:
As we move from top to bottom in a periodic table, atomic radius increases. Also, effective nuclear charge decreases. Due to this, energy required to remove the electron form valance shell decreases. Hence, ionization energy decreases from top to bottom.

In addition to this, metallic character increases from top to bottom. Metals have low electronegativity as compared to non-metals. Hence, electronegativilty value decreases from top to bottom.

The correct statement regarding the first ionization energy and electronegativity values in group 15 is as follows:

$\boxed{\left( 1 \right){\text{ The first ionization energy decreases and the electronegativity decreases}}}$

Further Explanation:

The amount of energy needed for the removal of the most loosely bound electron from a neutral isolated gaseous atom is termed as ionization energy, represented by IE. It depends on the ease of electron removal from the neutral atoms. If the electrons are removed easily, ionization energy will be less and vice-versa.

Ionization energy is called the first ionization energy when the first electron is removed from the atom. It is shown by $\left( {{\text{I}}{{\text{E}}_{\text{1}}}} \right)$ . Similarly, if the second electron is removed, ionization energy becomes the second ionization energy $\left( {{\text{I}}{{\text{E}}_{\text{2}}}} \right)$ .

The tendency of any element for electron attraction towards itself in a chemical bond is known as electronegativity. More the attracting tendency of the atom for electron, higher will be its electronegativity and vice-versa.

Atomic number and number of shells increase while going down group 15. Due to this, atomic size increases in the group from top to bottom. This increase in size results in weaker attractions between the outermost electrons and the atomic nucleus. So electrons are removed easily and therefore the first ionization energy decreases down this group.

Since atomic size increases from top to bottom of group 15, the attraction between the atomic nucleus and the electrons decreases. Therefore electronegativity also decreases down this group.

Therefore both the first ionization energy and electronegativity decrease down group 15.

Learn more:

Rank the elements according to first ionization energy: brainly.com/question/1550767
Arrange the following elements from greatest to least tendency to accept an electron: brainly.com/question/2107660

Answer details:

Grade: Senior School

Chapter: Periodic classification of elements

Subject: Chemistry

Keywords: ionization energy, first ionization energy, electronegativity, attraction, group 15, decrease.

What does it mean that valence electrons in a metal are delocalized?

Answers

Delocalized means that electrons in the metal are not linked only to a single atom or in a bond. Electrons are free to move and around the crystal structure and carry currents. This is why, in metals, there is a term "electron sea".

Answer:

Explanation:

Which of the following elements is NOT a transition metal?a. Copper
c. Sodium
b. Chromium
d. Iron

Answers

This answer is Sodium

D. Iron .. im not sure

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