Chemistry High School

Please Help giving high points. Perform the following mathematical operation, and eport the answer to the correct number of significant figures. 4568/1.3 = [?]​

Please Help Giving High Points. Perform The Following Mathematical Operation, And Eport The Answer To

Answers

Answer 1

Answer:

1.3 is the value with the lowest sig figs in your question. So we have 2 sig figs.

4568/1.3 = 3513.84615

Now let's change the answer in sig figs.

We know that trailing zeros don't actually count as part of sig figs.

So we can round the answer to 3500, having the 2 sig figs (3 and 5) while the trailing zeros don't count.

Final answer = 3500

Related Questions

how much water will you need to add to your working solution to get to a 100 ml total volume of a 0.03m nacl solution?

Answers

Answer:

The solution is made by adding 4.38 g NaCl to a 250-mL volumetric flask. About 100 mL of water are added and when all the NaCl dissolves water is added up ...

How many moles of AgCl can form from 6.5 moles of Ag and abundant HCl in the equation: 2Ag + 2HCl -> 2AgCl + H2

Answers

6.5 moles of AgCl can be formed from 6.5 moles of Ag.

STOICHIOMETRY:

According to this question, silver reacts with hydrochloric acid to form silver chloride and hydrogen gas as follows:

2Ag + 2HCl → 2AgCl + H2

Based on this balanced equation, 2 moles of silver (Ag) produces 2 moles of silver chloride (AgCl).

This means that 6.5 moles of Ag will produce (6.5 × 2)/2 = 6.5 moles of AgCl.

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how many moles of oxygen would you need to produce 4 moles of aluminum oxide? 4 Al + 3 O2 ----> 2 Al2O3

Answers

Answer:

6 moles

Explanation:

3 moles of O2 produce 2 moles of Al2O3 so in order to produce 4 moles pf AL2O3 you need 4 x 3 /2 moles of O.

noble gases are used in many situations where a safe and constant environment must be maintained. for example, helium is used to provide a protective atmosphere for making fiber optics and semiconductors. argon is used to fill incandescent and flourescent light bulbs to prevent oxygen from corroding the hot filament. why are noble gases used in these situations?

Answers

Answer:

Noble gases have a complete valence electron shell making them stable and nonreactive.

Explanation:

Look at the diagram. Which shows the correct arrangement of electrons in a hydrogen chloride molecule?

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Answer:

D............................

There are two types of chemical compound one is covalent compound and another is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. The correct representation is option D.

What is chemical Compound?

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Covalent bond is present in molecule HCl. Hydrogen has 1 electron in its outermost shell. Chlorine has 7 electrons in its valence shell. So one one electron from each element is shared between them to form a covalent bond.

Therefore, the correct representation of arrangement of electrons in a hydrogen chloride molecule is option D.

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True or False: A food chain is the feeding relationships among all the organisms in an
ecosystem.

Answers

Answer:

False.

Explanation:

A food web is the feeding relationships among all the organisms in an

ecosystem.

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The answer is false bro

arrange the bromine-containing compounds cabr2, br2, asbr3, cbr4 in order of increasing normal boiling point.

Answers

Answer:

Br2, CBr4, AsBr3, CaBr2. this is the increasing order of boiling point

The arrangement of given compound in the increasing order of normal boiling point is Br₂ < CBr₄ < AsBr₃ < CaBr₂.

What is normal boiling point?

Norma boiling point of any liquid is that point where the vapor pressure is equal to the standard sea level atmospheric pressure.

And boiling point is directly proportional to the strength of bond which is present between the atoms of any compound.

As we know that ionic bond is the strongest bond and in CaBr₂ ionic bond is present so the boiling point of this compound will be highest.In AsBr₃, bromine is more electronegative than arsenic and arsenic also have one lone pair on it so some dipole moment develope in it and then this compound will have boiling point less than CaBr₂.CBr₄ is a covalent compound as in this compound bromine is present which is more electronegative but overall dipole moment of this compound is zero.Br₂ is also a covalent molecule and it has no dipole moment in it and have minimun boiling point among all compounds.

So, correct order will be Br₂ < CBr₄ < AsBr₃ < CaBr₂.

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10. Would it be possible for an earthquake at this same location to be felt where you live? Why or why not ?

Answers

Answer:

yes if big  no if weak

Explanation:

According to new research, a large earthquake can not only cause other quakes, but also large ones on the opposite side of the Earth.

What is an earthquake and how it is caused?

An earthquake is a sudden movement of rock materials beneath the earth's surface that causes a weak to violent shaking of the ground. The earthquakes are caused by tectonic plate boundaries.

Every day, earthquakes occur all over the world, along both tectonic plate edges and interiors. Earthquakes happen along faults, which are fractures in the rock that allow the blocks to move relative to one another.

Earthquakes are typically caused by underground rock suddenly breaking and rapid movement along a fault. The seismic waves that cause the ground to shake are caused by this sudden release of energy.

A large earthquake can not only cause other quakes, but also large ones on the opposite side of the Earth, according to new research.

Thus, it is possible for an earthquake at this same location to be basically felt where you live.

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Identify the subatomic particles in strontium-82 and rubidium-82. Then, explain what type of nuclear decay is most likely to convert strontium-82 to rubidium-82.

Answers

We can convert strontium-82 to rubidium-82 by positron emission.

The three main fundamental subatomic particles in an atom are;

ProtonsNeutronsElectrons

In a neutral atom, the number of protons is always equal to the number of electrons.

In strontium-82, there are 44 neutrons, 38 electrons and 38 protons. In rubidium-82, there are 45 neutrons, 37 electrons and 37 protons. We can convert  strontium-82 to rubidium-82 by positron emission.

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PLEASE HELP

2.How many atoms are in 3.35 moles of Aluminum?

3.How many moles of CO2 gas are in a 101.25 L container filled with CO2 gas?

4.What is the mass of 13.7 moles of N2 gas?

Answers

Answer:

2: 2.02 x 1024 atoms

3: 4.5201 atoms

4: 384 g/mol

Explanation: I'm in your class

please help fast thank yuo

Answers

Answer:

what is your question tell may i can help you

Answer:

decrease as we go down a group I know ionisation energy increases from left to right across the periodic table

Which of the following is an oxidation-reduction reaction? Fe2O3 3CO Right arrow. 2Fe 3CO2 CuSO4 2NaOH Right arrow. Cu(OH)2 Na2SO4 2NaOH H2CO3 Right arrow. Na2CO3 2NaOH Pb(NO3)2 Na2SO4 Right arrow. 2NaNO3 PbSO4.

Answers

The reaction, Fe2O3 + 3CO------> 2Fe + 3CO2 is an oxidation-reduction reaction.

An oxidation-reduction reaction is a reaction in which there is a change in oxidation number from left to right in the reaction. This is because, a specie is oxidized and another specie is reduced.

In the reaction;  Fe2O3 + 3CO------> 2Fe + 3CO2, we can see that the oxidation number of iron decreased from +3 on the left hand side to zero on the right hand side. The oxidation number of carbon was increased from + 2 to +4.

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Answer:

A

Explanation:

EDGE2022

Direction: To compare and differentiate the animal and plant cell base on the presence and absence of certain organelles.Fill in the corresponding organelles in the Venn Diagram




please please answer this question properly i need it!!!!!!​

Answers

Answer:

hi what are you doing

Explanation:

............

A sample of nitrogen gas at STP has a volume of 65.8 L. What is the mass of the gas?
A)
82.3 g
B) 41.18
2.94 g
07
0.210 g
E
0.1058

Answers

Answer:

B

Explanation:

The paths that planets follow around the sun are called ____ , and they are shaped like an ellipse.

Answers

The path that planets follow around the sun are called orbitals.

The paths that planets follow around the sun are called as orbit, and they are shaped like an ellipse.

What is orbit ?

The orbits of the planets around the sun are elliptical. Kepler, an astronomer, provided a clear definition of these orbits. The three rules he created are referred to as Kepler's laws of planetary motion. It says that every planet does an orbit around the sun.

The plane of Earth's orbit around the sun serves as the definition of the ecliptic. The primary planets of our solar system, their moons, some asteroids, and their orbits all roughly follow this plane.

An orbit is a curved path taken by an object, such as a planet's path around a star, a natural satellite's path around a planet, or a man-made satellite's path around a planet, moon, or asteroid.

Thus, the paths that planets follow around the sun are called as orbit.

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what activity occurs in the process of photosynthesis

Answers

Answer:

Photosynthesis is the process in which light energy is converted into chemical energy in the form of sugars. In a process powered by light energy, glucose (and other sugars) molecules are created from water and carbon dioxide, while oxygen is released as a by-product.

Explanation:

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calculate the volume in dm3 occupied by 26.4 g of carbon dioxide​

Answers

Density of carbon dioxide=1564kg/m^3Mass=26.4g=0.0264kg

[tex]\\ \sf\longmapsto Density=\dfrac{Mass}{Volume}[/tex]

[tex]\\ \sf\longmapsto Volume=\dfrac{Mass}{Density}[/tex]

[tex]\\ \sf\longmapsto Volume=\dfrac{0.0264}{1564}[/tex]

[tex]\\ \sf\longmapsto Volume=1.687m^3=1.69m^3[/tex]

1m^3=1000dm^3

[tex]\\ \sf\longmapsto Volume=1.69(1000)=1690dm^3[/tex]

Pls help if you only know the correct answer! Thanks! :)

Answers

18. the blank should be "[tex]CO_{2}[/tex]"

19. the question seems to be answered.

20. [tex]CH_{3}[/tex]

Question 20 0/1 pts What is the frequency of a light wave with the wavelength of 680 nm? 'Reminder: the speed of light is 3.00 X 10 m/s​

Answers

Answer:

[tex]4.4*10^{14}[/tex]Hz

Explanation:

electric current is passed through water, it decomposes inti hydrogen and oxygen. write full balanced chemical equation for the reaction​

Answers

Answer:

2H2O ------------------] 2H2 + O2

what does the heisenberg uncertainty principle state

Answers

Answer: It states that there is a fundamental limit to what one can know about a quantum system.

Explanation:

Most stars are part of the main sequence of stars in the HR diagram

Question 2 options:
True
False

Answers

I’m pretty sure that the answer is true

Choose all of the examples that show a chemical change.
A) A woodpecker digs in the bark.
B) A dead tree rots on the ground.
C) A forest fire burns a lot of trees.
D) A farmer is cutting logs with an axe.
E) A tree drops rainwater from its leaves.

Answers

Answer:

B and C

Explanation:

Answer:

B) A dead tree rots on the ground.

C) A forest fire burns a lot of trees.

Explanation:

It cannot return the the state it was in before or have the same composition it had before.

Find the percent composition of OXYGEN in Manganese (III) nitrate, Mn(NO3)3.

Answers

Answer:

Mn(NO3)3 Molar mass = (54.93) + (3 x 14) + (9 x 16) = 240.93g/mol

Total number of Oxygen atoms in formula = 9

Total mass of oxygen atoms theoretically in the formula = 9x16 = 144g/mol

Oxygen's percentage composition:

(144/240.93) x 100 = 59.7% of the compound is oxygen

True or false: The
louder you yell into a
megaphone in space,
the more likely it is for
the sound waves to
travel.

Answers

Answer:

True

Explanation:

This is known as a lapse rate. When you shout something to someone across the lake, the sound waves near the surface end up moving faster than the sound waves higher up. Since the speed is greatest near the ground, sound waves bend upward, causing the audio to be just out of ears reach.

substance x reacts with sodium carbonate to form a gas . The gas turns lime water cloudy. What is substance K and which process takes place in the reaction?

Answers

When sodium carbonate reacts with hydrochloric acid, Carbon dioxide gas is released. Pass the gas through calcium hydroxide,the solution turns milky indicating that the gas is Carbon dioxide .

The substance K is hydrochloric acid and this is called as neutralisation.

hope this helps u

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Substance x is an acid. The process that takes place in the reaction is a Neutralization reaction

Neutralization reaction

From the question, we are to determine what substance x is.

First, we will identify the gas given off.

The gas that turns lime water milky is carbon (IV) oxide (CO₂) gas.

RECALL: Acids react with carbonate to produce salt and water with the release of carbon dioxide gas.

Hence, substance x is an acid. The process that takes place in the reaction is a Neutralization reaction.

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What is the relationship between layering of fluids and density?

Answers

Density of a liquid determines how it will layer (heaviest to lightest). If the liquid is least dense it will float to the bottom. Layers will remain separated because each liquid is actually floating on top of the more dense liquid beneath it.

A scientist tested a series of solutions to determine their pH, and recorded the results in this table.


Substance pH
A 9
B 12
C 11
D 14
According to this data, which solution would be most effective at neutralizing a strong acid?


Substance A

Substance B

Substance C

Substance D

Answers

D because strong bases ( and 14 is a strong base ) will make a strong acid neutral

Answer:d

Explanation:

Here is Beck's address:
12 Riverdale Lane, Apartment A
San Jose, California
USA
Imagine each of the five parts of Beck's address represents Earth, the Milky Way, the moon, the solar system, or the universe, based on their sizes. Which of the
following parts of Beck's address would represent the solar system?
O California
O 12 Riverdale Lane
San Jose
O USA

Answers

Answer:

The answer is San Jose

3CaCl2 + Al2O3 —> 3CaO + 2AlCl

Answers

im not sure about the answer sorry in advance if it's wrong

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