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saveliy_v [14]
4 years ago
7

Select the correct Answers.

Chemistry
2 answers:
Mandarinka [93]4 years ago
8 0

Answer:

3. The temperatures of the two substances equalize.

Explanation:

  • As two objects at different temperatures are placed in contact, heat is transferred from the warmer to the cooler object until the temperature of the two objects be the same.
  • The amount of heat that is transferred from the warmer object is equal to the amount of heat that is transferred into the cooler object.
  • This is in agreement with the law of conservation of energy.
  • <em>So, the right choice is: 3. The temperatures of the two substances equalize. </em>

<em></em>

Vanyuwa [196]4 years ago
7 0

Answer:

A and C

Explanation:

All temperatures end up the same if placed next to the other, and the heat is going out of the carbon dioxide into the water.

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Is there a relationship between the locations of earthquake, volcanoes, and plate boundaries? If so, describe the relationship.
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How many elements does hydrochloric acid have
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3 years ago
How many significant figures are in the number 020.310
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6 0
3 years ago
How is the oxidation state of a transition metal determined from the chemical formula ?
Vera_Pavlovna [14]

Answer:

Explanation:

In a chemical formula, the oxidation state of transition metals can be determined by establishing the relationships between the electrons gained and that which is lost by an atom.

We know that for compounds to be formed, atoms would either lose, gain or share electrons between one another.

The oxidation state is usually expressed using the oxidation number and it is a formal charge assigned to an atom which is present in a molecule or ion.

To ascertain the oxidation state, we have to comply with some rules:

  • The algebraic sum of all oxidation numbers of an atom in a neutral compound is zero.
  • The algebraic sum of all the oxidation numbers of all atoms in an ion containing more than one kind of atom is equal to  the charge on the ion.

For example, let us find the oxidation state of Cr in Cr₂O₇²⁻

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We see that the oxidation number of Cr, a transition metal in the given ion is +6.

7 0
4 years ago
Read 2 more answers
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