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lisabon 2012 [21]
3 years ago
6

True or false A(n) rift valley forms where plates diverge on land.

Chemistry
2 answers:
motikmotik3 years ago
4 0

Answer:

True

Explanation:

vlabodo [156]3 years ago
3 0

Answer:

true

Explanation:

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Is water an element compound or mixture
timama [110]
It is a Compound.

Water can't be a mixture because it is chemically bonded and cannot be separated into H2 and O by physical means.

And water cannot be an element, because it is made of atoms of different types [H and Oxygen]
4 0
2 years ago
Hydrogenation reactions are used to add hydrogen across double bonds in hydrocarbons and other organic compounds. use average bo
Mamont248 [21]
H2(g) +C2H4(g)→C2H6(g)
H-H +H2C =CH2→H3C-Ch3
2C -H bonds and one C-C bond are formed while enthalpy change (dH) of the reaction,
H-H: 432kJ/mol
C=C: 614kJ/mol
C-C: 413 kJ/mol
C-C: 347 kJ/mol
dH is equal to sum of the energies released during the formation of new bonds or negative sign, and sum of energies required to break old bonds or positive sign.
The bond which breaks energy is positive.
432+614 =1046kJ/mol
Formation of bond energy is negative
2(413) + 347 = 1173 kJ/mol
dH reaction is -1173 + 1046 =-127kJ/mol 
7 0
3 years ago
What is the oxidation number sulfur in H2S?
Nikolay [14]

The oxidation number sulfur in H₂S is -2.

A compound's total number of oxidations must be zero.

The two hydrogen atoms in the chemical hydrogen sulfide, H₂S, each have an oxidation number of +1, making a total of +2. As a result, the compound's sulfur has an oxidation number of -2, and the total number of oxidations is 0.

Assume that the sulfur atom in H₂S has an oxidation number of x.

S be x.

Now,

2+x=0

⇒x=−2

<h3>What is oxidation number?</h3>

The total number of electrons that an atom either receives or loses in order to create a chemical connection with another atom is known as the oxidation number, also known as the oxidation state.

Depending on whether we are taking into account the electronegativity of the atoms or not, these phrases can occasionally have a distinct meaning. Coordination chemistry commonly makes use of the phrase "oxidation number."

<h3>What distinguishes an oxidation number from an oxidation state?</h3>

In contrast to the oxidation state, which indicates how oxidised an atom is in a molecule, the oxidation number describes the charge that the core metal atom will retain once all ligands have been removed.

To know more about oxidation number:

brainly.com/question/13182308

#SPJ4

4 0
1 year ago
How do you toast a toaster?
Mama L [17]

by putting to much current through it ?

7 0
2 years ago
Which of the following substances best conducts electricity in an aqueous solution? CH3OH
lapo4ka [179]

Answer:

KCI

Explanation:

I took the test

5 0
2 years ago
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