Chemistry High School

help pls I will mark brainlest​

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Answers

Answer 1

Resources found in lithosphere: gold and iron etc

Resources found in atmosphere: Water vapor, gases etc.

Related Questions

PLZ HELP Question 2 of 25 What is the total number of atoms in the molecule CzHg?
A. 2
B. 8
C. 11
D. 3​

Answers

A. 2

One Cs (Caesium), the other one Hg (Mercury)

Note: we don't have Cz this might be Cs

In the figure a cyclist moves A to B and then to C.he could also go through the shortest path AC. Depending on this fact solve the following questions: Find the length of AC .Find the displacement and total distance covered.​

Answers

Answer:

hope it helps you see the attachment for further information

How does a cirrus cloud look like
1) cotton
2) thin feather​

Answers

Answer:

2) thin feather​

Explanation:

Cirrus clouds are delicate, feathery clouds that are made mostly of ice crystals. Their wispy shape comes from wind currents which twist and spread the ice crystals into strands.

hope it helps :)

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c. The element in group 2 and period 3 is -

Answers

Answer:

Magnesium

Explanation:

Hope this helps!

Which of the following is an example of a solution?

A. An iron alloy
B. Iron metal
C. Iron rust
D. An iron ore

Answers

Answer:

A: an iron alloy.

Explanation:

Because iron alloy consists of minor components that are distributed within the major component, which is the basic requirement for a solution.

- calculate relative formula mass
[N=14, O=16, Mg=24, Al=27]

1) Mg(NO3)2

- calculate relative molecular mass
[H=1, C=12, O=16]

1) C4H10

2) CH3COOH​

Answers

Mg(NO3)2:-

[tex] \\ \sf \longmapsto \: 24u+2(14u+3\times 16u)[/tex]

[tex] \\ \sf \longmapsto \: 24u+2(14u+48u)[/tex]

[tex]\\ \sf \longmapsto \: 24u+2(62u)[/tex]

[tex] \\ \sf \longmapsto \: 24u+(124u)[/tex]

[tex] \\ \sf \longmapsto \: 148u[/tex]

What is the purpose of a catalyst in the production of hydrogen?
Select the correct answer.
- to increase the rate at which water molecules decompose
- to decrease the amount of oxygen produced
- to decrease the temperature of the reaction
- to increase the activation energy of the reaction

Answers

The purpose of a catalyst in the production of hydrogen is to increase the rate at which water molecules decompose.

What is a catalyst-A catalyst is a substance that increases the rate of a chemical reaction without itself being consumed or produced during the reaction. As a result, catalysts assist in speeding up chemical reactions while also decreasing the amount of energy needed for the reaction to occur. In hydrogen production, catalysts are used to speed up the decomposition of water into hydrogen and oxygen. The use of catalysts lowers the activation energy required for the reaction to occur, resulting in a faster reaction rate and lower operating temperatures.What is the process of hydrogen production?Hydrogen production has various methods, and one of the most commonly used methods is water electrolysis. In this method, water molecules are split into hydrogen and oxygen using an electric current passed through an electrode. Water is broken down into hydrogen and oxygen during the process, with the assistance of a catalyst. During this process, a catalyst like platinum or nickel is employed to speed up the chemical reaction of water decomposition.

When an electric current is applied to the catalyst, water molecules are broken apart, releasing hydrogen and oxygen atoms.Catalysts lower the activation energy of the reaction, allowing it to occur faster than it would otherwise. In hydrogen production, catalysts are crucial since they enable the reaction to occur at a lower temperature, reducing energy consumption and minimizing operating costs. As a result, the use of catalysts is essential to the production of hydrogen.

for such more questions on  catalyst

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Determine the mass of 6.33 mol of iron(II) nitrate.

Answers

Answer:

1822.72 g

Explanation:

Applying,

n = R.M/M.M.................. Equation 1

Where n = number of moles of iron(II) nitrate, R.M = Reacting mass of iron(II) nitrate, M.M = molar mass of Iron(II) nitrate.

Make R.M the subject of the equation

R.M = n×M.M............. Equation 2

From the question,

Given: n = 6.33 mol

Constant: M.M of iron(II) nitrate = 287.95 g/mol

Substitute these values into equation 2

R.M = 6.33(287.95)

R.M = 1822.72 g

Hence the mass of iron(II) nitrate is 1822.72 g

g) silver nitrate + magnesium chloride → silver chloride + magnesium nitrate
​

Answers

Answer:

AgNo3+Mgcl2--->Agcl2+Mg(No3)2

I hope this helps

You work in the special effects department of a movie studio. You are currently working on a superhero movie where the hero is very strong and cannot be hurt by normal weapons such as a sword. In the next scene, the villain is going to hit the hero with a lead pipe. The hero's costume is mostly made of foam and carbon so that is it very light and easy to move around in but will crumble if hit with anything hard. For this scene, a section of the costume needs to be replaced with a different material that will only dent, not crumble, when hit with the pipe. You are on a deadline and look around the props department for ideas, what could you use?

Answers

Answer:

Aluminum or Galvanized iron

Explanation:

If the costume has to be such that the hero does not get hurt when hit by a lead rod and also is easy for the mobility then the suitable option for the costume could be Aluminum material which will only dent and not crumble.

Galvanized iron could be another choice being harder and stronger as compared to aluminum but a little heavy. It can sustain heavy impacts as compared to aluminum.

Answer:

You could use a shield if you are not speaking from a scientific way.

The world is made up of ​

Answers

Answer:

Explanation:

           The world is made up of ​living beings .    

Describe what happens to the particles when a substance:

1. Melts

2. Freezes

3. Boils

4. Condenses

Answers

Particles vibrate when frozen when it boils it moves like you had 4 monsters in the morning
1. It will melt.
2. It will freeze.
3. It will evaporation.
4. It will freeze.

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Give the structural formula of CH3CH(CH3)CH3​

Answers

In the structure, we essentially have a Carbon with 3 methyl groups and a hydrogen attached to it

Which of the following elements is the smallest?

Answers

Explanation:

where is options?????????????????

Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Its boiling point is the lowest among all the elements. Wikipedia
Symbol: He
Atomic mass: 4.002602 u
Atomic number: 2
Electron configuration: 1s2
Electrons per shell: 2
Boiling point: -268.9 °C

How much water will the measuring cup have if you poured 1/2 of it out?

Answers

The cup will be filled up halfway

Explain Froath Flotation Method!

​

Answers

Explanation:

a process for separating minerals from gangue by taking advantage of the differences in their hydrophobicity.

I believe that is accurate

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write any two conditions at which a body of certain mass weightless​

Answers

Answer:

A body becomes weightless in a zero-gravity scenario and when a force is applied to a body that is equal and opposite to the force of gravity. If the body is falling only under the influence of gravity.

Answer:

A body becomes weightless in a zero-gravity scenario and when a force is applied to a body that is equal and opposite to the force of gravity.If the body is falling only under the influence of gravity.

what is the percentage composition of water in crystallization of oxalic acid
​

Answers

Answer:

5.17 percentage is water

Explanation:

answer from gauth math

the text of oxygen gas in the laboratory ​

Answers

Explanation:in testing for oxygen a glowing splint is used.

the glowing splint is brought in the presence of the test tube containing the gas

the glowing splint rekindles or lights up showing that oxygen is present.

this is a positive test because oxygen supports burning or combustion

Specific heat capacity is _____.


greater for metal than for wood

the amount of heat required to raise the temperature of 1g of a substance 1 oC

represented by the symbol, Q

all of these

Answers

Answer:

all of this

Explanation:

PLZ HELP Matthew wants to study how the body responds when the skin is broken. He learns that particles in the blood clump together at the site of the wound to stop the bleeding while the skin heals. Which of the following body systems is involved in carrying the blood to the site of the wound?
A. Cardiovascular
B. Skeletal
C. Respiratory
D. Muscular​

Answers

Answer:

A, Cardiovascular system

cardiovascular system

can you answer with working out ​

Answers

This is your answer I hope it is right.

Convert the following absolute temperatures to centigrade.
i) 0 K
ii) 298 K
iii) 323 K
iv) 423 K

SHOW STEP BY STEP

Answers

Answer:

0 K

[tex]{ - \bf{273 \degree C}}[/tex]

298 K

[tex]{ \tt{ = 298 - 273}} \\ = { \bf{25 \degree C }}[/tex]

323 K

[tex]{ \tt{ = 323 - 273}} \\ = { \bf{50 \degree C}}[/tex]

423 K

[tex]{ \tt{ = 423 - 273}} \\ = { \bf{150 \degree C}}[/tex]

1.T=[£+273]

=273

It is because kelvin temperature is absolute zero.

Question 5
1.00 g of He, 14.0g F2, and 19.0 g Ar are placed in a 13.0-L container at 20.0 °C.

The total pressure (in atm) in the container is _____ atm.

1 point

Answers

Answer:

2.03 atm

Explanation:

Number of moles of He = 1g/4g/mol = 0.25 moles

Number of moles of F2 = 14.0g/38 g/mol = 0.37 moles

Number of moles of Ar=19.0g/40g/mol = 0.48 moles

Total number of moles = 0.25 + 0.37 + 0.48 = 1.1 moles

From;

PV=nRT

P= pressure of the gas mixture

V= volume of the gas mixture

n= total number of moles of the gas mixture

R= gas constant

T= temperature of the gas mixture

P= nRT/V

P= 1.1 × 0.082 × 293/13

P= 2.03 atm

An atom with 6 protons and 8 neutrons is an)

Answers

Answer: carbon (C)

Explanation:

Một hỗn hợp X gồm CH3OH; C2H5OH; phenol có khối lượng 28,9 gam phản ứng vừa hết với 100ml dung dịch NaOH 2M. Phần trăm theo khối lượng phenol là ? Biết C = 12; O = 16; H = 1; Na = 23. *

Answers

Answer: bạn viết phương trình Phenol + NaOH

=> nNaOH = nPhenol = 0,2 mol

m Phenol = 0,2x94 = 18,8 gam

%mPhenol = 18,8/28,9% = 65,05

Explanation:

5. The energy diagram shown illustrates a reaction which is
an
A. exothermic reaction.
B. activated complex.
C. equilibrium reaction.
D. endothermic reaction.

Answers

Answer:

Explanation:

The answer is an exothermic reaction so A.

Determine the mass in grams of 3.60 mol of H2 SO4

Answers

Answer:

Explanation:

There are 353 grams of H2SO4 in 3.60 moles of H2SO4.

How is a slump different from creep?

Answers

Answer:

Is this chemistry or ELA!

What is the oxidation state of fluorine (F)?
The Periodic Table
A.-2
B. +1
C. -1
D. +2

Answers

Answer:

It is C. -1

Explanation:

[tex] { \underline{ \sf{ \blue{christ \: † \: alone}}}}[/tex]

Other Questions
someone whos good with science this is for you btw Ill brainlist and rate 5 star due today.Write the word equation for each of the following metal oxidation reactions also the chemical equations below it.1) Osmium reacts with oxygen in the air to form a highly toxic chemical called osmium oxide+=+= The valves in the heart open and close to move blood in between heart chambers. O a) three directions O b) two directions O c) four directions d) one direction HELLO PLEASE HELP??which equation represents the circle described? 1. the radius is 2 units 2. the center of the circle is at (5,-6) (x+5)^2+ (y- 6)^2 =4(x - 5)^2 + ( y + 6)^2 = 4(x + 5)^2 + (y - 6)^2 =2 (x - 5)^2 + (y + 6)^2 =2 Topic 1You are a student in Danang city. You will describe your neighborhood for new students. You should say: 1/ Where to buy food2/ Where to buy furniture 3/ Where to get a bus to university4/ Where to send a package5/ How do you feel about Danang city?Remember to: - Introduce yourself before starting talking on your topic- Use structures There is and There are - Start and end the talk properly In the middle of East, intense eye contact between men is a sign of How much greater are the negative effects of depression, anxiety, substance abuse, and cognitive difficulties including memory issues for older adults who have lost a spouse compared to older adults who have not lost a spouse Complete the Similarity statement below only if the triangles are similar. please help! Here are the shopping times(in minuts) of nine shoppers at a local grocery store. complete the grouped frequency distribution for the data. in the distribution, the frequency of a class is the number of shopping times in that class.( Note that we are using a class width of 6.) Question 9 of 502 PointsWhat group of people might The Very Young Man represent in The Time Machine?A. PoliticiansB. DoctorsC. TeenagersOD. LawyersReset SelectionDe here to searchWBI70F On his recent free-throw attempts, Lamar made 4 shots and missed 6 shots. Considering thisdata, how many of his next 20 free-throw attempts would you expect Lamar to miss? what is the simplification of 9^8 / 9^7? What are the solutions to the quadratic equation (5y + 6)2 = 24?y = StartFraction negative 6 + 2 StartRoot 6 EndRoot Over 5 EndFraction and y = StartFraction negative 6 minus 2 StartRoot 6 EndRoot Over 5 EndFractiony = StartFraction negative 6 + 2 StartRoot 6 EndRoot Over 5 EndFraction and y = StartFraction 6 minus 2 StartRoot 6 EndRoot Over 5 EndFractiony = StartFraction negative 4 StartRoot 6 EndRoot Over 5 EndFraction and y = StartFraction negative 8 StartRoot 6 EndRoot Over 5 EndFractiony = StartFraction 4 StartRoot 6 EndRoot Over 5 EndFraction and y = StartFraction 8 StartRoot 6 EndRoot Over 5 EndFraction the dog went with thempls rearrange the jumbled sentences If the mass of an object is 15 kg and the velocity is -4 m/s, what is the momentum? c. The reaction Br2 (l) --> Br2 (g) has H = 30.91 kJ/mol and S = 93.3 J/molK. Use this information to show (within close agreement) that the boiling point of bromine is 332 K. Find x (Round to the nearest tenth). PLS HURRY Land surveyors outlined a park as shown. What is the area of the park? Can someone please answer B (PICTURE) [tex]3x + 9 = 12[/tex]Solve for x Bryan works as a salesman for Jumbo Corp. Last year his sales target was $3 million. This year in an aggressive bid for growth, the company increased the sales quota for all its sales people to $5 million, although the market for Jumbo Corps products had slowed. In order to meet his target, Bryan bribed an official of a potential customer. The roots of his unethical behavior can be traced to ___ cultural differences in countries. varying ethical standards in different nations. unrealistic performance goals. strong personal ethics among employees.