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3 years ago

Which bond pair does not have a polar covalent bond? P – Cl O – H S – Cl H – Cl Cl – Cl

1 answer:

5 0

So,

A polar covalent bond is a bond between two atoms that has a low electronegativity difference (usually 0.1 < x < 1.9, which is kind of the border between nonpolar covalent and ionic, respectively). The most prominent example of a polar covalent bond is water, where the oxygen atom has an electronegativity of 3.5 and the hydrogen atoms have electronegativities of 2.1. The electronegativity difference is 3.5-2.1 = 1.4, which is still in covalent territory, but still a polar bond. This is why lowercase delta's appear beside oxygen atoms in drawings.

Examining, the four options, we immediately see that option D is Cl-Cl. A bond between two of the same atoms inevitably implies an electronegativity difference of zero, which means a nonpolar covalent bond: electrons are equally shared. Anywhere you see two identical atoms bonding (except for metals), you will have a nonpolar covalent bond.

The correct answer is D.

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Please and thank you

Virty [35]

3.8mL of 0.42 phosphoric acid is required.

Reaction

2H3PO4 + 3CaCL3 → Ca3(PO)4 + 6HCl

moles CaCl2 =0.16 mol/L x0.010 L = 0.0016 mol

moles of H3Po4

= 0.0016mol of CaCl2 x 2 mole of H3PO4/3mole of CaCl2

= 0.00106 mol

V of H3PO4 = 0.0016/0.42 = 0.0038L = 3.8mL

V of H3PO4=3.8mL

To know more about calculation in milliliters refer to:-

brainly.com/question/23276655

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4 0

2 years ago

What is the mass of 3.0 x x times 10^23 atoms of neon?

Sladkaya [172]

Answer:

10.09 grams

Explanation:

First you need to know the number of moles you are dealing with.

If you know that each mole has 6.022x10²³ of something (in this case of atoms), you can divide 3x10²³ atoms of neons by 6.022x10²³ to obtain the number of moles.

You have 0.5 moles of Neon, so then by the periodic table, you see that the molar mass of neon is 20.18g/mol, so by each mole you have 20.18 grams of neon. Multiply 20.18 grams by 0.5 moles and you got 10.09 grams of Neon

7 0

2 years ago

A change in the core would have the greatest effect on what?

Misha Larkins [42]

<span>The magnetic field of the Earth serves a useful purpose in deflecting Solar radiation. Without the magnetic field there is much more charged-particle radiation striking the surface. The auroras would occur everywhere instead of at the magnetic poles. Compass needles wouldn't work, and then they would flip direction.. The magnetic field IS DECREASING and could go to zero and reverse sometime in the next few tens-of-thousands of years.</span>

6 0

3 years ago

In the symbol 3p4

kompoz [17]

Answer:

a. the 3 represents the principal energy level

Explanation:

3 is the principal energy level. The p is the sublevel. 4 is the possible occupying electron.

4 0

3 years ago

What are the four most common problems that can arise in your motor design?

Nuetrik [128]

Electric motors are an essential part of our daily life as many systems, applications, and services depend on them. Motors today have a long service life and require a minimum level of maintenance to make sure that they perform efficiently. In large buildings, motors have to be maintained on a regular basis because they need to be in operation all the time; one small problem could cause a great loss to the organization.

Usually in large organizations, a motor maintenance program is carried out in which the causes of motor failures are identified and some necessary steps are taken to avoid them or lower their impact. Motors need to be inspected regularly, and other maintenance activities need to be performed to ensure efficient operation. Whenever a problem occurs, it should be corrected immediately to avoid further loss.

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3 years ago