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Varvara68 [4.7K]
3 years ago
12

3. A student mixes a solid powder into a beaker of fluid. Which of the following would indicate that a chemical change has defin

itely occurred?​
Chemistry
1 answer:
Ket [755]3 years ago
5 0

Explanation:

A chemical change is a change in which a new kind of substance is produced. Such changes are always accompanied by energy changes.

They are mostly reversible.

Some examples of such reactions are combustion, rusting of iron, precipitation, rancidity of butter, souring of milk.

  • There might be some little change in mass
  • It requires a considerable amount of energy
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When HCl reacts with an ionic carbonate, the resulting carbonic acid, H2CO3, decomposes and the products include gaseous _____ a
goldfiish [28.3K]

The resulting carbonic acid decomposes into carbon dioxide and water molecules.

<h3 /><h3>How does carbonic acid decompose?</h3>

Carbonic acid goes by the chemical formula H2CO3.

When heated, carbonic acid decomposes to give two products which are:

  • A gaseous compound in the form of carbon dioxide
  • A neutral compound in the form of water molecules

The overall equation of the reaction is as follows:

   H₂CO₃ ⇌ H₂O + CO₂

More on carbonic acid can be found here: brainly.com/question/13929437

6 0
3 years ago
At 445 °C, Kc = 50.2. If one starts with 0.100 M H2 (g), 0.100 M I2 (g) and 0.0500 M HI (g) what is the equilibrium concentratio
garik1379 [7]
Here's The Answer: <span> K = 50.2 = (2x)^2 / (0.1-x)^2 
x = 0.078
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3 years ago
When would a life scientist study a nonliving thing such as a rock or lake
VladimirAG [237]
He would study it so he could see how it interacted with the living things around it.

3 0
3 years ago
You have used 2.4×102 L of distilled water for a dialysis patient. How many gallons of water is that?
Alinara [238K]

Answer:

63.36gallons

Explanation:

Given:

Volume of water used for dialysis = 2.4 x 10²L

Solution:

We are to convert from liters to gallons.

The conversion factor is shown below:

                1L = 0.264gallons

To convert to litre:

       since 1L = 0.264gallons

             2.4 x 10²L = (2.4 x 10² x 0.264)gallons; 63.36gallons

3 0
3 years ago
Summarize the weather conditions related to a cold front. Remember to include all data collected on cold fronts in this activity
svp [43]

Answer: Many fronts cause weather events such as rain, thunderstorms, gusty winds and  A weather front is a transition zone between two different air masses at the  Lifted warm air ahead of the front produces cumulus or cumulonimbus clouds

Explanation:

Hope this was helpful

5 0
3 years ago
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