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Bess [88]
3 years ago
12

50 POINTS WILL GIVE BRAINLYEST!!!!!!!!!

Chemistry
2 answers:
alina1380 [7]3 years ago
6 0

Answer:

true

Explanation:

Heat travels from the hot cocoa in the cup to your hands. No energy is transferred. Heat is transferred from your hands to the hot cocoa in the cup.

Juli2301 [7.4K]3 years ago
6 0

Answer: the answer is true

Explanation: brainlest please

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How to determine oxidation numbers
nadezda [96]

Answer:

1. The oxidation number of a free element is always 0.

2. The oxidation number of a monatomic ion equals the charge of the ion.

3. The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements.

4. The oxidation number of O in compounds is usually -2, but it is -1 in peroxides.

Explanation:

7 0
3 years ago
10) Calculate the energy change for the formation of LiCl(s) from its elements in their standard states and the following tabula
marissa [1.9K]

Answer:

-400.3 kJ/mol

Explanation:

3 0
3 years ago
Chlorine forms a number of oxides with the following oxidation numbers: 1, 3, 4, 6, and 7. These compounds are stable and neutra
SashulF [63]

Answer:

Cl_2O, Cl_2O_3, ClO_2, ClO_3, Cl_2O_7

Explanation:

Empirical formula of the compound is the simplest ratio of elements present in the compound.

Empirical formula of compounds of chlorine with oxygen is as follows:

Compounds in which oxidation state of Cl is +1

Cl_2O

Compounds in which oxidation state of Cl is +3

Cl_2O_3

Compounds in which oxidation state of Cl is +4

ClO_2

Compounds in which oxidation state of Cl is +6

ClO_3

Compounds in which oxidation state of Cl is +7

Cl_2O_7

8 0
3 years ago
As a phase change occurs when energy is removed or added to a system, the temperature of the substance stays constant because
Rashid [163]

Answer:

energy is being used to make or break bonds between molecules

Explanation:

if correct please consider brainliest

5 0
3 years ago
What is the surface composition of planets in the solar system?
Stels [109]

Answer:

A: Helium or Hydrogen

Explanation:

Terrestrial planets are the 4 inner most planets of the solar system which are mercury, venus, earth, Mars, while the giant planets are the 4 outer most which are Jupiter, Saturn, Uranus and Neptune.

Now, these outer most ones are the surface ones and are surrounded primarily by layers of hydrogen and helium gases.

3 0
2 years ago
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