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stiks02 [169]
4 years ago
5

A chemical reaction is carried out in a closed container. The energy absorbed by the chemical reaction is 150 kJ.

Chemistry
1 answer:
Juliette [100K]4 years ago
7 0

Answer:

The correct answer is 150 kJ.

Explanation:

As per Law of Conservation of Energy, energy can neither be created nor destroyed, it can only change from one form to another.

If a chemical reaction absorbs 150 kJ and all the energy that is being absorbed is neither created nor destroyed, then it means all the energy absorbed comes from the surroundings (Air, wall of container etc).

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hii what the procedures of making organic fertilizer and its precautions. can u answer it i kinda need it now
frez [133]

Answer:

Go through your kitchen waste. Vegetables and fruit peelings are the number one food remnants you should keep aside. ...

Add other organic materials to the compost. ...

Collect some garden waste. ...

Create the compost. ...

Apply the fertilizer.

3 0
2 years ago
Read 2 more answers
N__________ is the study of atoms.
AlekseyPX
I think the answer might be nuclear physics
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3 years ago
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How mamy moles of NaCl will be produced from 83.0g of Na, assuming Cl2 is available in excess
Anestetic [448]

Answer:

3.62moles

Explanation:

First let us generate a balanced equation for the reaction

2Na + Cl2 —> 2NaCl

Molar Mass of Na = 23g/mol

Mass of Na from the balanced equation = 2 x 23 = 46g

Molar Mass of NaCl = 23 + 35.5 = 58.5g/mol

Mass of NaCl from the balanced equation = 2 x 58.5 = 117g

From the question,

46g of Na produced 117g of NaCl.

Therefore, 83g of Na will produce = (83 x 117)/46 = 211.11g of NaCl

Converting this mass (211.11g of NaCl) to mole, we obtain:

n = Mass /Molar Mass

n = 211.11/ 58.5

3.62moles

8 0
3 years ago
Identify each of the following mixtures as either homogeneous or heterogeneous and as a solution, a suspension, or a colloid.
Sergeeva-Olga [200]

Blood.

<span>Blood is heterogeneous because it has corpuscles (blood cells and platelets) physically suspended in blood plasma.   Blood plasma and the corpuscles have different properties and can be separated by methods such as centrifugation. Also, blood is considered a colloid suspension because it has the properties of both a colloid and a suspension. This is because the blood plasma acts as a colloid. More so, if blood was left to settle,then the blood cells would collect at the bottom hence taking the characteristic of a suspension. </span>

<span>Salad dressing.</span>

<span>Depending on the type of salad, it can either be a heterogeneous or homogeneous mixture. If the salad dressing is only of vinegar or any other oil, then it is a homogenous mixture. However, if it involves a mixture of vinegar and other oils, pepper, herbs, and etcetera, then it is a heterogeneous mixture</span>




4 0
3 years ago
Read 2 more answers
Which of the following is a type of physical change.
trapecia [35]

Answer:

B. a change in their state or substance

Explanation:

A change of state consists of a physical process in which the structure of the substance changes, its appearance. EXAMPLE: in the merger, the solid state becomes liquid, changes the rearrangement of particles from being highly compacted to being less compact.

6 0
4 years ago
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