30 POINTS PLS MATCH THESE UP!!

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This is a species which speeds up chemical reactions, but does not react itself.
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Catalyst
The changing of substances to other substances by the breaking of bonds in
reactants and the formation of bonds in products.
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Chemical Reaction
This is the substance(s) formed in a chemical reaction.
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Neutralization
Precipitate
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A chemical reaction in which two or more substances combine to form a single
substance. Also known as a combination reaction.
A chemical change in which a single compound is broken down into two or more
simpler products,
Reactants
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decomposition reaction
double replacement
A chemical change in which one element replaces a second element in a compound,
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endothermic
A chemical change that involves an exchange of positive ions between two
compounds.
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exothermic
A heat-absorbing process
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half reaction
A heat releasing process.
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product
single replacement reaction
These are the elements or compounds that enter into a chemical reaction. .
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structural formula
This is the type of reaction that occurs when an acid cancels with a base.
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synthesis reaction
This is a solid that is formed during a chemical reaction, typically in solution.
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A half reaction shows either the oxidation or reduction half of a redox reaction.
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A formula showing all the atoms and valence electrons in the formula. This is also
called a Lewis Structure.
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Answer:

the result is C and D. those are the ansers

Answer:C & D

Explanation:

Just took the test

Answer:

250cm³ de disolución se deben preparar

Explanation:

El porcentaje volumen volumen (%v/v) se define como el volumen de soluto -En este caso, H2O2- en 100cm³ de disolución.

Se desea preparar una solución que contenga 20cm³ de H2O2 por cada 100cm³

Como solamente se cuenta con 50cm³ de H2O2, el volumen que se debe preparar es:

50cm³ H2O2 * (100cm³ Disolución / 20cm³ H2O2) =

Answer:

D

Explanation:

Because it has equal number of elements on each side of the arrow

Answer:

100 L

Explanation:

Use Boyle's Law, p1v1 = p2v2.

p1 = 4 atm

v1 = 50L

p2 = 2 atm

v2 = ?

p1v1 = p2v2

(4 atm) (50L) = (2 atm) (v2)

v2 = (4 atm)(50L) / (2 atm) = 100 L

Answer:  Therefore, to melt 2kg of ice 835. 48kJ of heat is required.

Explanation:

I hope this helps!

Answer:

a) pentane

b) 1,3-dimethyl butane

c) 3,4-diethyl-5-methlyl heptane

d) 1,3,5-triethyl-2,4,6-trimethyl  cyclohexane

Explanation:

The essence of IUPAC nomenclature is to provide a generally accepted nomenclature for chemical compounds which enables the structure of a compound to be drawn from its name without ambiguity.

In order to name straight chain organic compounds, we have to identify the parent chain and then give numbers to the substituents or locants such that they have the lowest possible numbers in alphabetical order.

The correct names of the organic compounds in the question are;

a) pentane

b) 1,3-dimethyl butane

c) 3,4-diethyl-5-methlyl heptane

d) 1,3,5-triethyl-2,4,6-trimethyl cyclohexane

Answer:

A. The samples contain the same substances in a variety of proportions.

Explanation:

Answer:

2Cu2O + C --> 4Cu + CO2

Explanation

The Law of conservation of Mass states You can not destroy or create math in a chemical reaction, meaning you must have the same amount at the beginning and the end. This equation keeps the same amount of atoms on both sides.

Answer: Yes, it is a balanced equation.

Explanation:

https://chemequations.com/en/?s=Cu2O+%2B+C+%3D+Cu+%2B+CO2

This is where I got the answer so you know.  Hope this helps :)

Answer:

Option C (1.2 L) is the correct option.

Explanation:

The given values are:

Pressure,

[tex]P_1=1.9 \ atm[/tex]

[tex]P_2=3.8 \ atm[/tex]

Volume,

[tex]V_1=2.3 \ L[/tex]

[tex]V_2=?[/tex]

As we know,

The gas equation is:

⇒  [tex]PV=nRT[/tex]

At constant temperature,

⇒  [tex]P_1 V_1=P_2 V_2[/tex]

or,

⇒      [tex]V_2=\frac{P_1 V_1}{P_2}[/tex]

By substituting the values, we get

⇒           [tex]=\frac{1.9\times 2.3}{3.8}[/tex]

⇒           [tex]=\frac{4.37}{3.8}[/tex]

⇒           [tex]=1.15 \ L[/tex]

or,

⇒           [tex]=1.2 \ L[/tex]

Answer:

[H+] = 1.66 x [tex]10^{-4}[/tex]

Explanation:

To find the [H+] concentration of a solution, we can use the formula:

[tex][H+] = 10^{-pH}[/tex]

Let's plug in the pH.

[tex][H+] = 10^{-3.78}[/tex]

Evaluate the exponent.

[H+] = 1.66 x [tex]10^{-4}[/tex]

Hope this helps!

Answer:

EPA

Explanation:

In the United States of America, the agency which was established by US Congress and saddled with the responsibility of overseeing all aspects of pollution, environmental clean up, pesticide use, contamination, and hazardous waste spills is the Environmental Protection Agency (EPA). Also, EPA research solutions, policy development, and enforcement of regulations through the resource Conservation and Recovery Act.

In conclusion, the Environmental Protection Agency (EPA) regulates water quality, air pollution, and solid waste to protect Americans from significant risks to human health and the environment.

Answer:

[tex]tiempo=0.72s[/tex]

Explanation:

¡Hola!

En este caso, como podemos observar, la relación entre la rapidez de reaction, las moles y el tiempo de reacción es:

[tex]rapidez=\frac{mol}{tiempo}[/tex]

De este modo, despejamos el tiempo en esta ecuación para obtener:

[tex]tiempo=\frac{mol}{rapidez}[/tex]

Así, reemplazamos la rapidez y moles dadas para obtener:

[tex]tiempo=\frac{0.323mol}{0.450mol/s}\\\\tiempo=0.72s[/tex]

¡Saludos!

Answer:

Sugar, sodium chloride, and hydrophilic proteins are all substances that dissolve in water. Oils, fats, and certain organic solvents do not dissolve in water because they are hydrophobic.

And, water is called the "universal solvent" because it dissolves more substances than any other liquid. ... Water molecules have a polar arrangement of the oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge.

I don't see any options so there i hope it helps .

It's ammonia (NH3).....

Answer:

A molecule with one lone pair and three bond pair

- Ammonia

Answer:

4.17M

Explanation:

m1v1/m2v2=n1/n2

Answer:

1

Explanation:

Answer:

water vapor (gas) is becoming liquid

Answer : A. 3

Explanation:

3Al(s) + 3O2(g) → 3Al2O3(s)

This is the right Answer :3

I hope you are having a great day :3

Explanation:

amount of baking soda = 2.01 g

---> 2.01 g NaHCO3 × (1 mol NaHCO3/84.007 g NaHCO3)

= 0.024 mol NaHCO3

mass of the product = 1.28 g

Possible reactions:

NaHCO3(s) ---> NaOH(s) + CO2(g)

0.024 mol NaHCO3 × (1 mol NaOH/1 mol NaHCO3)

= 0.024 mol NaOH × (39.997 g NaOH/1.mol NaOH)

= 0.96 g NaOH

2NaHCO3(s) ---> Na2O(s) + 2CO2(g) + H2O(g)

0.024 mol NaHCO3 × (1 mol Na2O/2 mol NaHCO3)

= 0.012 mol Na2O × (61.9789 g Na2O)

= 0.73 g Na2O

2NaHCO3(s) ---> Na2CO3(s) + CO2(g) + H2O(g)

0.024 mol NaHCO3 × (1 mol Na2CO3/2 mol NaHCO3)

= 0.012 mol Na2CO3 × (105.9888 g Na2CO3/1 mol Na2CO3)

= 1.27 g Na2CO3

Conclusion:

Based on the mass of the product in the crucible and comparing it with the predicted product mass in different reactions, I conclude that Na2CO3 is the most likely product in the crucible.

Answer:

See Explanation

Explanation:

a) In writing the balanced chemical reaction equation, the number of atoms of each element on the right hand side must be the same as the number of atoms of each element on the left hand side. The balanced reaction equation is;

2AgNO3(aq) + CaCl2(aq) ------> 2AgCl(s) + Ca(NO3)2(aq)

b) The total ionic equation shows all the ions present in the reaction system as follows;

2Ag^+(aq) + 2NO3^-(aq) + Ca^2+(aq) + 2Cl^-(aq) ---->2AgCl(s) + Ca^2+(aq) + 2NO3^-(aq)

c) The net ionic equation shows the ions that really participated in the reaction;

2Ag^+(aq) + 2Cl^-(aq) ---->2AgCl(s)

d) The spectator ions didn't undergo any change from left to right in the reaction equation. They include;

NO3^-(aq) and  Ca^2+(aq)

Answer:

To find the relative formula mass (M r) of a compound, you add together the relative atomic mass values (A r values) for all the atoms in its formula.

Explanation: Find the M r of carbon monoxide, CO. Find the M r of sodium oxide, Na 2O. The relative formula mass of a substance, shown in grams, is called one mole of that substance.

Explanation:

asexual reproduction involves 1 parent and produces offspring that are genetically identical to each other and parent.

Sexual reproduction involves 2 parents and produces offspring that are genetically unique.

Answer:

D . It describes a compound being broken down into the elements from which it was formed.

Explanation:

A compound consists of two or more elements chemically combined together in a chemical reaction. The compound carbon monoxide is represented by the chemical symbol, CO. This means that it contains 1 atom of the carbon element and 1 atom of the Oxygen element.

This compound is formed when carbon is directly oxidized in a limited supply of oxygen. In the above reaction, this compound is disintegrated into its individual components, namely, carbon and oxygen.

Answer:

21.8

Explanation:

add both because there both forces are going down

Answer:

"When two or more elements combine to form more than one compound, the mass of one of them, which joins the fixed mass of the other, is in relation to whole numbers and simple" Example: The carbo