All categories

3 years ago

When gases are released from a reaction what type of change has occurred?

Chemistry

2 answers:

umka21 [38]3 years ago

3 0

Answer:

Color Changes. A change in color often indicates a chemical change.

Temperature Changes. Changes in temperature might also indicate a chemical change has occurred.

Precipitates. The formation of a precipitate is a sign that a chemical change has occurred.

Light Emission.

Gas Production.

Explanation:

Lesechka [4]3 years ago

3 0

Answer:

A chemical change has occurred.

Explanation:

A chemical change is accompanied by a change in the chemical composition of the substance.

A color change, formation of a precipitate, evolution of a gas , temperature change are the indications of a chemical change.

For example

$2AlCl_3 (aq)+3Na_2 CO_3 (aq)>Al_2 (CO_3 )_3 (s)+6NaCl(aq)$

Here we see the formation of a precipitate or an insoluble solid $Al_2(CO_3 )_3 (s)$

A chemical reaction is accompanied by a change in temperature.

Reaction in which heat is evolved is an exothermic reaction and reaction in which heat is absorbed is called as endothermic reaction.

Combustion reaction is an example in which heat and light is given off and it is exothermic.

Some reactions we see gas gets evolved. For example electrolysis of water produces Hydrogen and oxygen gas.

$2H_2O>2H_2+O_2$

You might be interested in

What element is being oxidized Fe2O3 + 3CO -> 2FE +3C02

Vinvika [58]

Fe because oxidation mean loss of oxygen and Fe lose the oxygen so Fe is oxidised

7 0

3 years ago

I WILL GIVE BRAINLIEST ANSWER IN 5 MINS

snow_lady [41]

Physical Properties: Sodium bicarbonate is an odorless, white crystalline solid or fine powder. It has a slightly alkaline taste. Its density is 2.20 g mL-1 and it decomposes in temperatures above 50 ºC. The decomposition yields to sodium carbonate. It is highly soluble in water and poorly soluble in acetone and methanol. It is insoluble in ethanol.

Chemical Properties: Sodium bicarbonate is an amphoteric compounds, it means the compound has a character acids an basic at the same time. It is highly soluble in water, resulting in a slighty alkaline solution.

i hope this part helps i will continue to research on Toothpaste's properties

6 0

3 years ago

4. In a solution, what pulls particles into the solution?

Tanya [424]

The correct answer to your question is B, solvent.
let me know if you have any further questions
:)

3 0

3 years ago

Which is an "enumerated" power of Congress?

fredd [130]

Answer:

In this section, we consider how several of the enumerated powers of Congress under the original Constitution have been interpreted. The Congress shall have Power To lay and collect Taxes, Duties, Imposts and Excises, to pay the Debts and provide for the common Defence and general Welfare of the United States.

6 0

3 years ago

Read 2 more answers

Calculate the volume of a balloon that can hold 113.4 g of nitrogen dioxide, NO2 gas at STP-

Karolina [17]

Answer:

55.18 L

Explanation:

First we convert 113.4 g of NO₂ into moles, using its molar mass:

113.4 g ÷ 46 g/mol = 2.465 mol

Then we use the PV=nRT formula, where:

P = 1atm & T = 273K (This means STP)

n = 2.465 mol

R = 0.082 atm·L·mol⁻¹·K⁻¹

V = ?

Input the data:

1 atm * V = 2.465 mol * 0.082atm·L·mol⁻¹·K⁻¹ * 273 K

And solve for V:

V = 55.18 L

6 0

3 years ago