What solution usually goes in burette? 1) Acid 2) Base 3) Indicators 4) Water

What is the frequency of a wave?

Lunna [17]

Divide velocity by the wavelength.

6 0

4 years ago

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What 2 chemicals react together during photosynthesis

Nitella [24]

Answer:

The photosynthesis chemical equation states that the reactants (carbon dioxide, water and sunlight), yield two products, glucose and oxygen gas. The single chemical equation represents the overall process of photosynthesis.

Explanation:

Definition: the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

Hope this helps!

Can I get brainliest?

5 0

4 years ago

List a couple general characteristics of primary consumers and list a few examples.

kakasveta [241]

Primary consumers operate one level up from plants and eat only plants

small crustaceans as primary consumers

antelopes as primary consumers

mice are the primary consumers

4 0

3 years ago

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*PLEASE HELP*

slava [35]

1 Double displacement

2 A) a reaction in which the exchange of electrons (or oxygen) occurs

3 A) Silver has a lower activity than hydrogen and cannot replace it.

4 C) 2C₂H₆ + 7O₂ → 4CO₂ +6H₂O

5. two

6.C) redox

7.B) The ions of two ionic compounds switch places and a gas is formed.

Explanation:

Problem 1:

Equation of the reaction:

Na₂S + Cd(NO₃)₂→CdS + 2NaNO₃

The above reaction is a double displacement reaction in which ions of two ionic compounds changes position to form new products.

A double displacement reaction is also known as metathesis.

The reaction involves actual exchange of partners to form new products.
In most double displacement reactions, precipitates are usually formed.
There might also be formation of water and any non-ionizing compound.
liberation of a gaseous product.

Learn more:

precipitates brainly.com/question/8896163

Question 2

A) a reaction in which the exchange of electrons (or oxygen) occurs:

Redox reactions are reactions in which one species is reduced and another species is oxidized simultaneously.

In this reaction types, there is exchange of electrons between reacting species.
In non-redox reactions, there is no exchange or transfer of electrons.
Redox reactions involves the transfer of electrons in which a specie gains and the other loses.

Learn more:

Oxidation brainly.com/question/2086855

Question 3:

A) Silver has a lower activity than hydrogen and cannot replace it.

H₂O + Ag→no reaction

The reaction above is a single replacement reaction

The replacement of a metallic ion in solution by a metal higher in the activity series than the metal in solution is this kind of reaction.
The positions of the two elements in the activity series provides the driving force for this reaction.
Hydrogen is higher than Ag in the reactivity series.
Since hydrogen is more reactive, Silver cannot displace it and the reaction will not occur.

Learn more:

Reactivity brainly.com/question/2193659

Question 4:

4 C) 2C₂H₆ + 7O₂ → 4CO₂ +6H₂O

Solution:

C₂H₆ + O₂→CO₂+H₂O

For combustion reactions in hydrocarbons, we use the expression below:

CₓHₙ + x + $\frac{n}{4}$ O₂ → xCO₂ + $\frac{n}{2}$ H₂O

x = 2 , n = 6

x + $\frac{n}{4}$ = 2 + $\frac{6}{4}$ = $\frac{7}{2}$

$\frac{n}{2}$ = $\frac{6}{2}$ = 3

multiply the coefficients by 2:

2, 7, 4 and 6

learn more:

Combustion brainly.com/question/1971314

Question 5

four

2NaNO₃ + CaCl₂ → 2NaCl + Ca(NO₃)₂

To find the number of atoms of Na, we must understand what an atom really is;

An atom is the smallest particle of an atom that takes part in chemical reaction. Distinct elements are made up unique types of atoms.

In the above reaction, we have:

2moles of NaNO₃ on the left hand side:

we have 2 Atoms of Na,

2 atoms N

6 atoms of O

2 moles of NaCl contains:

2 atoms of Na

2 atoms of Cl

In all, we have 4 atoms of Na

learn more:

Atoms brainly.com/question/10216585

Question 6

C) redox

AgNO₃(aq)+Cu(s)→Ag(s)+Cu(NO₃)₂(aq)

In a redox reaction, a specie is reduced and another is oxidized in the reaction.

In this reaction, one specie loses electrons and the other gains it.
Certain reactants change their oxidation state so as to form products.

In the reaction above,

Ag undergoes reduction; it goes from Ag⁺ to Ag from a +1 to zero.

whereas Copper goes from O to 2+ oxidation state.

Actually, this reaction is more appropriately described as a single displacement reaction in which atom higher in the activity series displaces the lower one.

learn more:

Redox Oxidation brainly.com/question/2086855

Question 7:

B) The ions of two ionic compounds switch places and a gas is formed.

A double displacement reaction is also known as metathesis or double replacement reaction.
It usually involves ionic compounds.
The reaction involves an exchange of partners to form new compounds.

One of the following serves as driving force for double displacement reactions:

formation of an insoluble compound called precipitate
formation of water or any other non-ionizing compound
liberation of a gaseous product.

Learn more:

Precipitate formation brainly.com/question/8896163

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7 0

3 years ago

Differentiate between acids and bases on the basis of their pH values. Give an example of each type.

Andrews [41]

Bases are the chemical opposite of acids. Acids are defined as compounds that donate a hydrogen ion (H+) to another compound.

Definition of Acids - An acid is any chemical compound which when dissolved in water gives a solution with a hydrogen ion activity greater than in pure water. Bronstead Lowry

Definition of Base - A base is an aqueous substance that can accept hydrogen ions. Bronstead Lowry Definition: A base is any substance which accepts a proton.

Physical Characteristics of Acids - Depending on the temperature, acids can occur in solid, liquid or gaseous form. Taste sour.

Physical Characteristics of Base - Bases feel slippery because of the reaction of the base with the oils of your hand. Frequently solids except ammonia which is a gas. Taste bitter.

Properties of Acids - Electrolytes, conduct electricity (because electrolytes), react with many metals.

Properties of Base - Electrolytes, conduct electricity, ranges from insoluble to so soluble that they can react with water vapor.

Acids are often used to remove rust from metals, as an electrolyte in batteries, for mineral processing, to produce fertilizers and gasoline and as additives in food and beverages. Bases are used primarily in cleaning as dishwashing and laundry detergents, oven cleaners and stain removers.

Here are some differences! Hope this helps, sorry I couldn't think of anything else. ;(

5 0

3 years ago