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3 years ago

Why phosphorus forms 3 bonds in molecule such as PH3 and PCl3-

Chemistry

2 answers:

gregori [183]3 years ago

6 0

Phosphorous has three lone electrons that need pairing. Similar to how carbon has 4 lone electrons, and forms CH4

antoniya [11.8K]3 years ago

4 0

Answer:

The 3p orbital of the element will be completely filled if it forms 3 bonds with other atoms.

Explanation:

Phosphorus is a element of 15 group and 3 period.

The electronic configuration of the phosphorous is:

1s²2s²2p⁶3s²3p³

The 3p orbital of phosphorous is singly filled by 3 electrons and if it shares more 3 electrons with other atom, its valence shell will be completely filled which makes it more stable. Hence, phosphorus makes 3 bonds like in PH₃ and PCl₃ .

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Humans depend on water from various sources for different reasons. All of these sources are polluted or could be polluted to som

goldenfox [79]

Explanation:

Earth is known as the "Blue Planet" because 71 percent of the Earth's surface is covered with water. Water also exists below land surface and as water vapor in the air. Water is a finite source. The bottled water that is consumed today might possibly be the same water that once trickled down the back of a wooly mammoth. The Earth is a closed system, meaning that very little matter, including water, ever leaves or enters the atmosphere; the water that was here billions of years ago is still here now. But, the Earth cleans and replenishes the water supply through the hydrologic cycle.

please mark as brainliest

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3 years ago

Please I need help with this. Whoever answers it correctly will get Brainly

Umnica [9.8K]

Answer:

its a. the one about the wolves. its not the last one, bc animals that graze (eat grass & plants) mostly eat that, and rarely eat meat

<333 now give me brainliest babe

Explanation:

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2 years ago

Calculate the concentration of OH- in a solution that contains 3.9 x 10-4 M H3O+ at 25°C. Identify the solution as acidic, basic

aalyn [17]

Answer:

[OH⁻] = 2,6x10⁻¹¹

Acidic

Explanation:

The kw in water is:

2 H₂O(l) ⇄ OH⁻(aq) + H₃O⁺(aq)

kw = [OH⁻] [H₃O⁺] = 1,00x10⁻¹⁴

If concentracion of H₃O⁺ is 3,9x10⁻⁴M:

[OH⁻] [3,9x10⁻⁴M] = 1,00x10⁻¹⁴

[OH⁻] = 2,6x10⁻¹¹

pH is defined as - log[H₃O⁺]. If pH>7,0 the solution is basic, if pH<7,0 solution is acidic, if pH=7,0 solution is neutral.

In this problem,

pH = - log [3,9x10⁻⁴M] = 3,4

As pH is < 7.0, the solution is acidic

I hope it helps!

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3 years ago

An isotope contains 16 protons 18 electrons and 16 neutrons. what is the identity of the isotope

jarptica [38.1K]

Answer:

Sulfur

Explanation:

You find the identity by looking at the number of protons. The number of protons never change for an element.

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3 years ago

On the periodic table, the average atomic mass for carbon is 12.01 g. Why is it not exactly 12.00?

KiRa [710]

The average the natural abundances of the various isotopes of carbon to arrive at the fractional mass.

5 0

2 years ago