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2 years ago

PLZ HELP which of the following is an example of a physical change

Chemistry

2 answers:

Elena L [17]2 years ago

8 0

Answer:

C.matter changes,but no new substance is formed.

lubasha [3.4K]2 years ago

7 0

Answer:

D. A piece of food turns brown and starts to smell bad is the answer because it is physical change and physical change is permanent change

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Given that the molar mass of carbon is 12 g/mol and the molar mass of oxygen is 16 g/mol, calculate the molar mass of carbon dio

nekit [7.7K]

Molar mass of oxygen is:
M(O)=16 g/mol
Molar mass of carbon is:
M(C)=12 g/mol
Molar mass of carbon dioxide is:
M(CO2)=M(C)+2*M(O)
M(CO2)=12 g/mol+2*16g/mol
M(CO2)=44 g/mol

<span>Molar mass(M) is the mass of 1 mole of the substance (grams per mole of a compound).</span>

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3 years ago

What happens in nuclear fission reactions?

Dmitry [639]

Answer:

in nuclear fission, an unstable atom splits into 2 or more smaller pieces that are more stable and releases energy in the process. the fission process also releases extra neutrons which can split additional atoms, resulting in a chain reaction that releases a lot of energy

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2 years ago

Read 2 more answers

The following chemical reaction occurs in a basic solution.

Dafna1 [17]

Answer:

6 moles of electrons

Explanation:

Let us consider the species NO3− and ClO−. The NO3− is oxidized to NO the oxidation number of nitrogen is decreased from +5 to +2.

The oxidation number of chlorine is increased from +1 to +3. This implies that six electrons were transferred in the balanced reaction equation shown in the question. Hence the answer.

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2 years ago

Which of the following occurs when a covalent bond forms? Which of the following occurs when a covalent bond forms? Partial char

Alexus [3.1K]

Answer: Option (b) is the correct answer.

Explanation:

A covalent bond is defined as the bond which occurs due to sharing of electrons between the combining atoms.

Generally, a covalent bond is formed between non-metals.

For example, both nitrogen and oxygen atoms are non-metals and they combine covalently to form $NO_{2}$ compound.

As nitrogen has 5 valence electrons and an oxygen atom has 6 valence electrons. So, there occurs unequal sharing of electrons between the two.

Thus, we can conclude that when a covalent bond forms then electrons in valence shells are shared between atoms.

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2 years ago

g Suppose the formation of nitrosyl chloride proceeds by the following mechanism: step elementary reaction rate constant That is

PIT_PIT [208]

Answer:

Check the explanation

Explanation:

Kindly check the attached image below to see the step by step explanation to the question above.

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2 years ago

PLZ HELP which of the following is an example of a physical change ​

PLZ HELP which of the following is an example of a physical change