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Ronch
1 month ago
10

Jane made this picture to represent a chemical reaction: Two circles, one white and the other gray are shown on the left. A smal

l portion of the two circles overlap and the label below the circles is XY. An arrow pointing right is shown on the right of the overlapping circles. There are two circles on the right of the arrow, one white and the other gray, and there is a plus sign between them. The white circle is labeled X and the gray circle is labeled Y.
Which of the following statements best explains the type of chemical reaction represented by Jane's picture?

It represents a synthesis reaction because one combined reactant forms multiple products.
It represents a synthesis reaction because the same atoms are present in the reactants and products.
It represents a decomposition reaction because one reactant breaks apart and forms two products.
It represents a decomposition reaction because the total mass of the products is less than the mass of the reactant.

Chemistry
2 answers:
lorasvet [2.7K]1 month ago
8 0

This is a decomposition reaction because one reactant separates to create two products.

Clarification:

The chemical reaction illustrated by Jane is classified as a decomposition reaction since a single reactant disassociates and yields two distinct products.

In this instance, XY disintegrates into X and Y. This results in a decomposition reaction.

                     XY   →   X + Y

  • Decomposition or cracking refers to the formation of two or more products from a single reactant.
  • Breaking down a compound into its individual atoms or molecules fits this classification.
  • The extreme instability of a compound triggers this kind of reaction.
  • The resulting products are generally stable, or they may further dissociate until stability is achieved.

      Please refer to the image included for further clarification:

Learn more:

Thermal decomposition

Alekssandra [3K]1 month ago
3 0

Response:

This reaction is categorized as a decomposition reaction due to the separation of one reactant into two distinct products.

Clarification:

took the test

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Answer:

Indeed, the chemist is capable of identifying the compound present in the sample.

Explanation:

In one mole of K₂O, potassium has a mass of 2 × 39.1 g = 78.2 g, while the total mass of K₂O is 94.2 g. The mass ratio of K compared to K₂O is calculated as 78.2 g / 94.2 g = 0.830.

For 1 mole of K₂O₂, potassium's mass remains the same at 78.2 g, but the total mass of K₂O₂ is 110.2 g. The mass ratio of K to K₂O₂ then equates to 78.2 g / 110.2 g = 0.710.

When the chemist measures the mass of K in relation to the overall sample, the mass ratio can be computed.

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6 0
2 months ago
What features of this model will help Armando answer the question?
lions [2927]

Answer:

The adjustable legs along with the sand table.

Note: The question is incomplete. The full question is presented below.

Using Models to Address Questions Regarding Systems

Armando’s class was examining images of rivers shaped by flowing water. Most rivers appeared wide and shallow, except for one, which was narrow and deep. The students theorized that this river's narrowness and depth are due to:

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To explore the answer to the question of why this river is so narrow and deep, Armando created the model outlined below.

Explanation:

The model constructed by Armando will facilitate addressing the question due to specific features:

1. Adjustable leg - as one theory proposed by the class suggests that the steep hill affecting the water's path could be the reason for the river's dimensions, the adjustable legs are designed to be raised or lowered to alter the slope, allowing testing of this theory.

2. Sand table - this acts as the streambed. By modifying the size of the sand grains, students can examine the second hypothesis that smaller sand grains contribute to the river's narrowness and depth.

The outcomes of their experimentation will lead them to a conclusion.

5 0
1 month ago
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lions [2927]

Solution:

Molality measures the concentration of a solute in a solution, defined by the amount of solute per specific mass of solvent.

Thus,

Molality = moles of solute / kg of solvent.

Therefore, kg of solvent = moles of solute / molality.

moles of solute = mass / molar mass

= 25.31 g / 101.1 g/mole

= 0.2503 mole.

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= 1.263 kg

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This is the final answer.

6 0
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The accurate choice is the final one.
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1 month ago
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