Chemistry College

Can someone help me I only have 5 minutes left.

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Answer 1

Graph 4. Graph 4 is the answer but I need 20 characters

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Will give brainliest

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Answer:

Explanation:

The concept behind, is mole ratio of Al:FeO

For the following reaction, calculate how many moles of each product are formed when 4.05 g of water is used.

2 H2O → 2 H2 +02

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Answer:

A. 0.225 mole of H₂

B. 0.113 mole of O₂.

Explanation:

We'll begin by calculating the number of mole in 4.05 g of water (H₂O). This can be obtained as follow:

Mass of H₂O = 4.05 g

Molar mass of H₂O = (2×1) + 16 = 2 + 16 = 18 g/mol

Mole of H₂O =?

Mole = mass /Molar mass

Mole of H₂O = 4.05 / 18

Mole of H₂O = 0.225 mole

Next, the balanced equation.

2H₂O —> 2H₂ + O₂

From the balanced equation above,

2 moles of H₂O produced 2 moles of H₂ and 1 mole of O₂.

A. Determination of the number of mole hydrogen produced.

From the balanced equation above,

2 moles of H₂O produced 2 moles of H₂.

Therefore, 0.225 mole of H₂O will also produce 0.225 mole of H₂.

B. Determination of the number of mole oxygen produced.

From the balanced equation above,

2 moles of H₂O produced 1 mole of O₂.

Therefore, 0.225 mole of H₂O will produce = (0.225 × 1)/2 = 0.113 mole of O₂.

Thus, 0.113 mole of O₂ is produced.

Pieces of DNA that pass genetic traits from parent to offspring

A. Phenotype
B. Gene
D. Allele

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Answer:

gene

Explanation:

PLEASE HELP ME!!!!!!!!

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Answer:

I think the answer is false

I think the answer is true am not sure tho.

anyways i passed my chemistry final yall. yupp

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Explanation:

CONGRATULATIONS!!!!!

Answer:

chemistary more lliek dumastry ahaha

Explanation:

An angle of refraction is the angle between the refracted ray and the

incident ray.
normal.
medium.
boundary.

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Answer:

Normal

Explanation:

with the boundary, is a glancing angle

with the incident ray, is the field of view

Answer:

B. normal

Explanation:

A mirror forms an image because of which behavior of light?

refraction
reflection
diffraction
absorption

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Answer: reflection

Explanation:

A mirror forms an image because of reflection of light. Therefore, the correct option is option B among all the given options.

What is light?

Light is the electromagnetic radiation that is visible with the eye. Electromagnetic radiation has a very broad wavelength range, ranging from gamma rays having wavelengths shorter than around 1 1011 metre to radio waves with wavelengths measured in metres.

The spectral areas next to the visible band, infrared at one end as well as ultraviolet at the other, are often commonly referred to as light. The velocity of light in the vacuum is indeed a basic physical constant, with the current accepted value being 299,792,458 meters per second, or approximately 186,282 miles a second. A mirror forms an image because of reflection of light.

Therefore, the correct option is option B.

To learn more about light, here:

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What is another name for acetic acid? *
1. lemons, limes or oranges
2 .vinegar
3. vitamin C

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It’s not b because vinegar is no less than 4%. Most likely it’s C but I’m not sure if you do choose C let me know if I’m wrong or right. Good luck !

Please help this affects my grade a lot and im confused

Double Replacement/Combustion I need to find the product of each one
zinc oxide + Cobalt(III) nitrite
Calcium hydroxide + phosphoric acid
Copper(I) dichromate + Iron(III) arsenate
Hydrochloric acid + aluminum hydroxide

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1 ) Cobalt(II) nitrate react with nitrate zinc(II) to produce cobalt(III)-zinc oxide, nitrogen dioxide and oxygen

2Co(NO3)2 + Zn(NO3)2 → Co2ZnO4 + 6NO2 + O2

2) Calcium hydroxide react with phosphoric acid to produce calcium, hydrogen phosphate and water

Ca(OH)2 + H3PO4 → CaHPO4 + 2H2O

3) Copper(II) dichromate will react with Iron(III) arsenate to form Copper(II) Arsenate and Iron(III) dichromate

3Cr2CuO7 + 2AsFeO4 → Cu3(AsO4)2 + Fe2(Cr2O7)3

Reaction Type : Double Displacement

4) aluminium hydroxide and hydrochloric acid react to form aluminium chloride and water

Al(OH)3 + 3HCl → AlCl3 + 3H2O

all of the following are properties of ionic compounds except:

A. Ionic compounds have low melting points,

B. Ionic compounds have high boiling points

C. Ionic compounds conduct electricity when dissolved in water

D. Ionic compounds are solid at room temperature

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Answer:

Explanation:

They have generally high melting point compared to covalent compounds because they are formed by electrostatic force of attraction between two opposite charge is not easy to melt them in low melting point.

Ionic compounds have high melting and boiling points. Therefore, option A is not a property of ionic compound. Hence, option A is the correct answer.

Ionic compounds are neutral compounds. Ionic compounds are formed from cations and anions. Positively charged ion (cation) and negatively charged ion (anion) are held together with strong ionic bond. Some main properties of ionic compounds are,

High melting point and boiling pointsHave definite size and shapeConduct electricity in molten statesoluble in water and not soluble in organic solvents

Thus, we can conclude ionic compounds have high melting and boiling points. Hence, option A is the correct answer.

Learn more about ionic compounds here:

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Plz help
Plz and thank u

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D Excretory systems regulate the chemical composition of body fluids by removing metabolic wastes and retaining the proper amounts of water, salts, and nutrients. Components of this system in vertebrates include the kidneys, liver, lungs, and skin.

fill in the blank please

amino acids as _____ are to words

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Answer:

Sentences are where there is a beginning and an end of a section of a paragraph. Letters are individual parts of sentences.

The answer that would make the MOST sense would be SENTENCES

what is the Curie used to measure

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Answer:

it's used to measure intensity of radioactivity in a sample of material

sodium hydroxide + sulfuric acid

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Answer:

NaOH + H2SO4 ‐‐> 2H2O + Na2SO4;

Explanation:

NaOH+H2SO4= Na2SO4+H2O

Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are mixed. If a precipitate will form, enter its empirical formula in the last column.

solution A solution B Does a precipitate form when A and B are mixed? empirical formula of precipitate
zinc nitrate iron(II) iodide

yes

no

potassium bromide lead(II) nitrate

yes

no

ammonium bromide sodium hydroxide

yes

no

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Answer:

1) No, 2) Yes, 3) Yes

Explanation:

Refer to solubility rules to understand if a precipitate occurs between a mix of solutions.

Two solutions form a precipitate if they react to yield an insoluble product.

Let us now consider each of the reacting species one after the other.

In the first case;

Zn(NO3)2(aq) + FeI2(aq) ----> ZnI2(aq) + Fe(NO3)2(aq)

The two products of the reaction are soluble so no precipitate is formed.

In the second case;

2KBr(aq) + Pb(NO3)2(aq) ------> 2KNO3(aq) + PbBr2(s)

An insoluble product PbBr2 is formed hence a precipitate is formed.

In the third case;

NH4Br(aq) + NaOH(aq) -------> NH4OH(aq) + NaBr(aq)

No insoluble product is formed so the there is no precipitate.

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How many moles are present in 2.126 g of H2O2 ?

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Answer:

molecular weight of H2O2 or grams. This compound is also known as Hydrogen Peroxide. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles H2O2, or 34.01468 grams.

1 grams H2O2 is equal to 0.029399071224542 mole.

1 grams H2O2 to mol = 0.0294 mol

10 grams H2O2 to mol = 0.29399 mol

20 grams H2O2 to mol = 0.58798 mol

30 grams H2O2 to mol = 0.88197 mol

40 grams H2O2 to mol = 1.17596 mol

50 grams H2O2 to mol = 1.46995 mol

100 grams H2O2 to mol = 2.93991 mol

200 grams H2O2 to mol = 5.87981 mol

There are 0.0625mol in 2.126 g of H2O2.

HOW TO CALCULATE MOLES:

The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass. That is;

no. of moles (mol) = mass (g) ÷ molar mass (g/mol)

According to this question, 2.126 g of H2O2 were given. The number of moles of H2O2 can be calculated as follows:

Molar mass of H2O2 = 1(2) + 16(2)

= 2 + 32

= 34g/mol

no. of moles = 2.126g ÷ 34g/mol

no. of moles = 0.0625mol

Therefore, there are 0.0625mol in 2.126 g of H2O2..

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which particles are transferred or shared when atoms form bonds?

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Answer:

The electrons are shared when atoms form bonds.

what is stastical thermodaynamics deal?

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Explanation:

Statistical thermodynamics is a theory that uses molecular properties to predict the behavior of macroscopic quantities of compounds. ... From these energy-level data, a temperature-dependent quantity called the partition function can be calculated.

Answer:

the stastical thermodaynamics deal is essentially a theory that you can use the molecules and their properties in order to predict how the molecule will behave in a macroscopic quantities of compounds. Using this, you can also tell a temperature-dependent quantity called the partition function.

(I also didn't copy and paste this, so it's safe for you to use)

May I have brainliest please? :)

PLEASE HELP

is this a chemical or physical change???

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Answer:

Chemical, cause physical are changes affecting the form of a chemical substance, but not its chemical composition. This doesn't affect the substance but the composition.

Explanation:

chemical change! answer: chemical change!

step by step explanation:

All of these are types of slime except

A cornstarch slime.
B algal slime.
C slime molds.
D bacterial slime.

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Answer:

imma say slime molds

Explanation:

if I'm wrong please tell me

Answer:

algal slime i think

Explanation:

An amusement park charges $27 for adult tickets (a) and $24 for children's tickets (c). Last Friday the amusement park sold 272 tickets and collected $7,137. Which of the following systems of equations is a correct representation of this data?

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Try using a calculator

Answer:

a+c=272

27a+24c=7,137

Explanation: Hope this helps!!!

What does the chemical formula C3H6O2 tell about a molecule of the compound it represents?

It is made up of 3 atoms of 11 different elements.
It is made up of 11 atoms joined in a straight line.
It is made up of 11 total atoms of 3 different elements.
It is made up of 1 atom composed of 3 different elements.

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Answer:

it number 3 it's made up of total 11 atoms of 3 different elements .

Answer:

Explanation:

The larges lakes in the world are found in:

A. Asia

B. Europe

C. North America

D. South America

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The answer is
C. North America
Explanation:

how is the strength of an acid affected by the number of hydrogen ions it contains

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More the no. of hydrogen ions more is the solution acidic.

pH means the power of hydrogen that determines the concentration of hydrogen ions or the level of acidiy or basicity of a solution.

so more the hydrogen ions more will be the Power of Hydrogen (pH) and thus more wil be the acidity.

which event would most likely lead to a thunderstorm HELP GIVING BRAINLIEST

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Warm moist air jaisjsisksusjisjud

Answer:

Explanation:

i got right

what is the molecular formula of methanoic acid

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Answer:

CH₂O₂

Mark me as brainliest plz.

Explanation:

CH2o2.is right ans hi I'm anmol kulkar from India

A certain first-row transition metal ion forms many different colored solutions. When four coordination compounds of this metal, each having the same coordination number, are dissolved in water, the colors of the solutions are red, yellow, green, and blue. Further experiments reveal that two of the complex ions are paramagnetic with four unpaired electrons and the other two are diamagnetic. What can be deduced from this information about the four coordination compounds

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Answer:

See explanation

Explanation:

From the analysis we have in the question, we must look towards a first row transition metal ion having a d^6 configuration because it yields a paramagnetic complex having four unpaired electrons and a diamagnetic complex having no unpaired electrons.

We have two possible candidates in mind, Fe^2+ and Co^3+. However, Fe^2+ does not form as many coloured complexes as stated in the question so we have to eliminate that option.

We are now left with only Co^3+. Various ligands are going to cause these various colours of Co^3+ to appear in solution.

Hence, we can deduce from all these that the nature of ligands determines the colour of the complex . Don't forget that the colour of a complex arises from crystal field splitting.

I am a nonmetal.I am in the Oxygen family and in row 3.I have 6 valence electrons.I am yellow and have a stinky smell.Who am i

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Answer:

sulfur

Explanation:

In oxygen family sulfur has yellow color and also having stinky smell. Thus given statements are about sulfur.

It is present in oxygen family.

It has six valance electrons.

Its atomic number is 16.

Its atomic weight is 32 amu.

The electronic configuration of sulfur is given below,

S₁₆ = 1s² 2s² 2p⁶ 3s² 3p⁴

We can see the valance shell is third shell and it have six electrons thus sulfur have six valance electrons. (3s² 3p⁴ )

Sulfur is used in vulcanisation process.

It is used in bleach and also as a preservative for many food.

it is used to making gun powder.

6b
Which of the following is a starting compound during
cellular respiration?

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Answer: Oxygen and glucose.

Explanation:

Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.Jun 1, 2020

Which term best describes the molecule shown below?

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Answer:

Unsaturated alkene

Explanation: