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nikklg [1K]
3 years ago
12

True or false? dry ice subliming (turning from a solid straight into a gas) is an example of a chemical change.

Chemistry
1 answer:
Over [174]3 years ago
5 0
False because when a substance changes from one state of matter to another it is a physical change no matter how many states of matter it skips




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For each balanced reaction, indicate the total number of atoms in the table below.
Afina-wow [57]

(i) Make ammonia number of atoms on reactant side is 8 and on product side is 8. (ii) Separate water number of atoms on reactant side is 6 and on product side is 6. (iii) Combust methane number of atoms on reactant side is 9 and number of atoms on product side is 9.  

<h3>What is Balanced Chemical Equation ?</h3>

The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.

(i) Make Ammonia

First we have to write the balanced chemical equation

             N₂ + 3H₂ → 2NH₃

Reactant side              Product side

N = 2                             N = 2

H = 6                             H = 6

So total number of atoms on product and reactant side is 8.

(ii) Separate Water

First we have to write the balanced chemical equation

            2H₂O → 2H₂ + O₂

Reactant side              Product side

H = 4                             H = 4

O = 2                             O = 2

So total number of atoms on product and reactant side is 6.

(iii) Combust methane

First we have to write the balanced chemical equation

       CH₄ + 2O₂ → 2H₂O + CO₂

Reactant side              Product side

C = 1                             C = 1

H = 4                            H = 4

O = 4                            O = 4

So total number of atoms on product and reactant side is 9.

Thus from the above conclusion we can say that For each balanced reaction, the total number of atoms are

Reaction                            Total number of atoms

                                     Reactant side           Product side

Make Ammonia                   8                               8

Separate Water                   6                               6

Combust Methane              9                               9

Learn more about the Balanced Chemical Equation here: brainly.com/question/26694427

#SPJ1

Disclaimer: The question was given incomplete on the portal. Here is the complete question.

Question: For each balanced reaction, indicate the total number of atoms in the table below.

Reaction                            Total number of atoms

                                     Reactant side           Product side

Make Ammonia            _________              __________

Separate Water            _________              __________

Combust Methane       _________              __________

3 0
2 years ago
Read this document. Explain why continued research and the use of new technology are important in the development and commercial
Kipish [7]

Answer:

When Polymers are together than they make Monomers, polymers are large molecules. Natural Polymers and Synthetic Polymers are two types of Polymers. They are use for different things.

Explanation:

Hope it helps.

4 0
3 years ago
12.60 m has<br> significant figures.
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Answer:

4

Explanation:

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3 years ago
How many electrons in an atom with the electron configuration of 1s2 2s2 2p6 3s1
Montano1993 [528]
The element would be Magnesium, so there would be 12 electrons.

Hope this helps!! (:
4 0
3 years ago
When a body is at rest, what do we call initial velocity
Anna11 [10]

Answer:

Initial Velocity is when movement begins. When a body is at rest, the initial velocity is at 0 m/s.

Explanation:

Initial Velocity is the velocity at time interval t = 0

3 0
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