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3 years ago

In which of the following is the number of electrons the ion contains given correctly

Chemistry

1 answer:

larisa [96]3 years ago

8 0

Answer:

B. K+ has 18 electrons

Explanation:

Ions are formed when atoms of element gain or loose electrons.
When an atom looses electrons it forms a positively charged ion and when an atom gains electrons it forms a negatively charged ion.
Metal atoms such as potassium, magnesium and aluminium looses outer most electrons to positively charged ions.
Potassium atom has 19 electrons, 19 protons, with an electronic configuration of 2 : 8 : 8 : 1. To form an ion, K looses an electron to form a positively charged potassium ion (K+) with 18 electrons and 19 protons and an electronic configuration of 2:8:8.

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A 32.4 L gas sample at STP is compressed to a volume of 28.4 L, and the temperature is increased to 352 K. What is the new press

Sindrei [870]

Answer:

1.47 atm

Explanation:

Step 1: Given data

Initial volume (V₁): 32.4 L

Initial pressure (P₁): 1 atm (standard pressure)

Initial temperature (T₁): 273 K (standard temperature)

Final volume (V₂): 28.4 L

Final pressure (P₂): ?

Final temperature (T₂): 352 K

Step 2: Calculate the final pressure of the gas

We can calculate the final pressure of the gas using the combined gas law.

P₁ × V₁ / T₁ = P₂ × V₂ / T₂

P₂ = P₁ × V₁ × T₂ / T₁ × V₂

P₂ = 1 atm × 32.4 L × 352 K / 273 K × 28.4 L = 1.47 atm

7 0

3 years ago

Write the molecular formula of nitrate using criss cross method

exis [7]

Answer:

NO3 that is the answer to the question

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3 years ago

What does it mean to have protein in your urine?

konstantin123 [22]

It is often a sign of kidney problems. :)

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3 years ago

Which of the

saul85 [17]

Answer:

During chemical reactions, matter is neither

created nor destroyed; it just changes form.

Explanation:

6 0

3 years ago

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Answer all questions please and be quick, it’s very URGENT U will get BRAINLY

HACTEHA [7]

Explanation:

Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. ... Electric charge is carried by subatomic particles. In ordinary matter, negativecharge is carried by electrons, and positive charge is carried by the protons in the nuclei of atoms.

Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charge: positive and negative (commonly carried by protons and electrons respectively). Like charges repel and unlike attract. An object with an absence of net charge is referred to as neutral. Early knowledge of how charged substances interact is now called classical electrodynamics, and is still accurate for problems that do not require consideration of quantum effects.

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3 years ago