A covalent bond forms a. when an element becomes a noble gas.
b. when atoms share electrons.
c. between metals and nonmetals.
d. when electrons are transferred from one atom to another.

Answers

Answer 1

Answer: B.) When atoms share electrons/......

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What event marks the beginning of Earth's current era?O A. The emergence of human life
O B. A mass extinction
O C. The disappearance of land bridges
O D. The end of the last ice age

Answers

B. We are in the cenzoic era so what previously had happen to cause the life we live today was a huge mass extinction.... hope this helps!!

Answer:

A mass extinction

Explanation:

Explain how cobalt-60 and cobalt -59 can be the same element but have different mass numbers

Answers

The number of protons and the atomic number are the same for both forms of cobalt, but the number of neutrons varies for each cobalt ion.

DA gas has a volume of 4.00 L at 0 degrees Celsius. What final temperature, in degrees Celsius, is needed to change the volume of the gas to each of the following, if n and p do not change?A. 1.50 L
B. 1200 mL
C. 10.0 L
D. 50.0 mL

Answers

The final temperature is -170.625 degree Celsius ,-191.1 degree C, 409.5 degree C,-272.66 degrees Celsius .

What is Charle's Law ?

According to Charle's Law , For an Ideal Gas , the volume is directly proportional to temperature when no. of moles and Pressure remains constant.

It is given in the question that

A gas has a volume of 4.00 L

T = 0 degree Celsius = 273 K

T' = ? for each scenario

the volume of the gas = 1.5 l , 1200ml , 10 l , 50ml

if n and p do not change

$\rm (V_1)/(T_1) = (V_2)/(T_2)$

For V₂ = 1.5 l

4 / 273 = 1.5 / T₂

T₂ = 1.5*273/4

T₂ = 102.375 K = -170.625 degree Celsius

For V₂ = 1.2 l

4/273 = 1.2/T₂

T₂ = 81.9 K = -191.1 degree C

For V₂ = 10 l

4/273 = 10/T₂

T₂ = 682.5 K= 409.5 degree C

For V₂ = 50/1000= 0.005L

4/273 = 0.005/T₂

T₂ = 0.34125 K= -272.66 degree C

Therefore the final temperature in degrees Celsius has been determined.

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D 50.O ML IS THE ANSWER

Rusting is the common name for the corrosion of iron or steel. the brown-orange rust commonly seen on iron or steel cars, nails, chains, or posts has the formula fe2o3. what is its iupac name?

Answers

The IUPAC name for Fe2O3 is Iron (III) oxide. Rusting is the common name for the corrosion of iron or steel.

Rusting of iron is known as as corrosion and withinside the procedure of corrosion the iron get transformed into iron oxide and that is an instance of chemical change. The chemical formula of rust is Fe2O3. The interplay of Iron with air and water produces rust. The Oxygen exist withinside the air shape a powdered substance known as rust. The rust is a red-orange flaky substance and the phenomenon of the formation of rust is known as rusting. Rusting is an oxidation procedure, and is much more likely to arise at the steel surface.

Therefore, the IUPAC name for Fe2O3 is Iron (III) oxide.

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An atom of lithium 7 has an equal number of