Explain how you know it must be oxygen. Where
did the oxygen come from?
Intro
Previous Activity
I
000
O Tutoring Help

Answers

Answer 1

Answer:

oxygen is a present in our atmosphere and mixed with other gases on the surrounding screen plants are also measure source of getting oxygen they take carbon dioxide from making their food by for the cities and give away oxygen in return

Explanation:

most of the earth oxygen comes from tiny Ocean plants are called phytoplaston


Related Questions

The cutoff frequency for a certain
element is 1.22 x 1015 Hz. What is its
work function in eV?
Hint: 1 eV 1.60 x 10-19 J
[?] eV

Answers

The cutoff frequency for a certain element is 1.22 x 1015 Hz this is its

work function in eV that is Work done = 5.05 eV.

What is supposed through a piece function?

Definition of labor function is the power this is wished for a particle to return back from the indoors of a medium and spoil via the surface —used particularly of the photoelectric and thermionic emission of electrons from metals paintings function.

Work function = hfh= planks constant.f= frequency.W = 6.626 10^-34  1.22* 10^15.W = 8.08  10^-19 / ( 1.6 10^-19)W = 5.05 eV.

Read more about work:

https://brainly.com/question/1501489

#SPJ1

Figure 2 shows what happens to the electrons in the outer shells when a sodium atom reacts with a fluorine atom.

The dots (•) and crosses (x) represent electrons.

Describe, as fully as you can, what happens when sodium reacts with
fluorine to produce sodium fluoride.

Answers

Sodium reacts with fluorine to make a covalent bond between them.  A covalent bond is formed when there is a mutual sharing of electrons between the two adjacent atoms.

Here, Sodium is metal and fluorine is non-metal. So, the bond between them may be an ionic bond, but as the Sodium has one valence electron and fluorine is highly electronegative. Sodium wants to lose electrons and fluorine wants to gain electrons to form a chemical bond. Therefore, the sodium donates its valence electron to fluorine, forms a cation, and fluorine accepts the electron and forms an anion and they distribute the difference in the charge between them.

So, we can say that when sodium and fluorine react to form sodium fluoride with a covalent bond.

Learn more about covalent bonds here:

https://brainly.com/question/12732708

#SPJ10

You are trying to determine how
many moles of lithium nitrate are in
256 mL of a 0.855 M solution.
How many liters is 256 mL?

Answers

Answer:

0,218 moles

Explanation:

I will first explain how many liters is 256ml, that is 0,256 l.

because the m stands for milli which is a factor of 1000 -> (256 ml / 1000 = 0,256 l)

To calculate the amount of moles you multiply the volume with the concentration. So 0,256l x 0,855M = 0,218 moles.

Answer: 0.256

Explanation:

How does nuclear fission occur?

A) Protons gather in the nucleus of Uranium atoms and cause the nucleus to explode and release energy in the form of heat.

B) Neutrons smash into the nucleus of Uranium atoms. The neutrons are then split in half and release the energy in the form of heat .​

Answers

A
Since it is the nucleus that splits and not the the neutrons

9- Which pair of formulae represents two alkanes? (1 mark)
A)CH4 and C8H18
B)C₂H6 and C5H8
C) C3H6 and C5H12
D) C₁0H8 and C4H8​

Answers

Answer:

A) CH4 and C8H18

Explanation:

General Formula for an Alkane = CnH2n+2

This means for every number of Carbon (C) atoms, there are twice as many Hydrogen (H) atoms with an additional two added onto that.

Therefore, if there is one Carbon Atom, and we multiply that by two, and then add an additional two, we get 4 Hydrogen atoms, so CH4, which is our first Formulae

Secondly, if we have eight Carbon Atoms, and we multiple that by two (16), and then add an additional two, we get 18 Hydrogen atoms, so C8H18, which is our second Formulae

The other Formulas do not follow this 'General Formula'

I need the answer asap

Answers

Answer:

The energy will be added  

Explanation:

A distillation column with a partial reboiler and a total condenser is being used to separate a mixture of benzene, toluene, and 1,2,3-trimethylbenzene. The feed, 40 mol% benzene, 30 mol% toluene, and 30 mol% 1,2,3-trimethylbenzene, enters the column as a saturated vapor. We desire 95% recovery of the toluene in the distillate and 95% of the 1,2,3-trimethylbenzene in the bottoms. The reflux is returned as a saturated liquid, and constant molar overflow can be assumed. The column operates at a pressure of 1 atm. Find the number of equilibrium stages required at total reflux, and the recovery fraction of benzene in the distillate. Solutions of benzene, toluene, and 1,2,3-trimethylbenzene are ideal.

Answers

Answer:

11.8.4 Distillation Columns

Distillation columns present a hazard in that they contain large inventories of flammable boiling liquid, usually under pressure. There are a number of situations which may lead to loss of containment of this liquid.

The conditions of operation of the equipment associated with the distillation column, particularly the reboiler and bottoms pump, are severe, so that failure is more probable.

The reduction of hazard in distillation columns by the limitation of inventory has been discussed above. A distillation column has a large input of heat at the reboiler and a large output at the condenser. If cooling at the condenser is lost, the column may suffer overpressure. It is necessary to protect against this by higher pressure design, relief valves, or HIPS. On the other hand, loss of steam at the reboiler can cause underpressure in the column. On columns operating at or near atmospheric pressure, full vacuum design, vacuum breakers, or inert gas injection is needed for protection. Deposition of flammable materials on packing surfaces has led to many fires on opening of distillation column for maintenance.

Another hazard is overpressure due to heat radiation from fire. Again pressure relief devices are required to provide protection.

The protection of distillation columns is one of the topics treated in detail in codes for pressure relief such as APIRP 521. Likewise, it is one of the principal applications of trip systems.

Another quite different hazard in a distillation column is the ingress of water. The rapid expansion of the water as it flashes to steam can create very damaging overpressures.

How do you separate a honey and water solution?

Answers

Answer:

Keep it undisturbed for some time and let it settle down. Then use a separating funnel, to separate them both

Explanation:

Please check the photo! I will award brainliest ONLY FOR PERSON WHO GIVES A LEGITIMATE ANSWER!!! Thank you :)

Answers

From the calculations, the percentage of the mineral left is 6.25%.

What is half life?

The term half life refers to the time that it takes for only half of the number of radioactive isotopes to remain.

From;

N/No = (0.5)^t/t1/2

N = ?

No = ??

t = 2000

t1/2 = 500

N/No =(0.5)^(2000/500)

N/No = 0.0625

Thus the percent left = 0.0625 * 100 = 6.25%

Learn more about half life of a nucleus:https://brainly.com/question/23518766

#SPJ1

Warning signs are sometimes placed on aerosol cans to prevent people from throwing them into a fire. What is true about the gas in the aerosol can after it is placed in a fire? Check all that apply.

Answers

Answer:

If the gas in the aerosol is placed in a fire then the volume will remain constant.

Explanation:

Avogadro's Law provides the formula needed to determine the relationship between the gas amount and volume present in a container.

                        Plez   na me   brainliestt

Newton law of motion

Answers

Answer:

newtons law states that every body in the universe attracts every other body with a force which is directly proportional to the product of their masses and inversely proportional to square of the distance between their centers

Answer:

an object at rest tends to stay at rest

the ability to roll your tongue allele T is dominant to the allele t inability to roll your tongue. if mother is a homozygous tongue roller TT and father tt can't roll his tongue. what possible offspring will they have?​

Answers

Answer:

homozygote

Explanation:

Because tongue-rolling is recessive, the only way a person would be unable to roll his/her tongue would be if s/he were homozygous mutant.

what is the percent yield of sulfur dioxide if the burning of 25.0 g of carbon disulfide produces 40.5 g of sulfur dioxide?

Answers

Answer:

25-54-46-36 619-73 77-88-50

What is the answer to this question? I need help!!

Answers

Answer:

[tex]\fbox {C}[/tex]

Explanation:

By repeating the experiment with new amounts of each reactant, this conflict can be resolved as we can see the effect of a reactant on the final amount of product formed.

The AP Biology teacher is measuring out 638.0 g of dextrose (C6H12O6) for a lab. How many moles of dextrose is this equivalent to?

Answers

The AP Biology teacher is measuring out 638.0 g of dextrose (C6H12O6) for a lab the moles of dextrose is this equivalent to is 3.6888 moles.

What are moles?

A mole is described as 6.02214076 × 1023 of a few chemical unit, be it atoms, molecules, ions, or others. The mole is a handy unit to apply due to the tremendous variety of atoms, molecules, or others in any substance.

To calculate molar equivalents for every reagent, divide the moles of that reagent through the moles of the restricting reagent. The calculation is follows:

655/12 x 6 + 12+ 16 x 6 = 655/ 180 = 3.6888 moles.

Read more about moles:

https://brainly.com/question/24322641

#SPJ1

if earth has an oxidizing environment, what would you expect to happen to if left to sit over time?

Answers

If the earth is completely an oxidizing atmosphere, materials would ignite spontaneously when they are exposed to air.

What would happen if the earth is an oxidizing environment?

Let us recall that oxidation has to do with an increase in oxidation number. If the earth is left as an oxidizing atmosphere without any attenuation, we can not have pure substances.

Secondly, materials would ignite spontaneously when they are exposed to the oxidizing atmosphere of the earth.

Learn more about oxidation:https://brainly.com/question/9496279

#SPJ11

What is the molar volume of a gas at standard temperature and pressure? 1.0 L2.4 L11.2 L22.4 L

Answers

The molar volume of a gas at standard temperature and pressure is 22.4L

Molar volume of a gas at STP

Because the particles in gases are compressible, they can be driven to enclose one another when subjected to high pressure. As a result, the volume of the gas is smaller and there is less free space. The temperature has an impact on gas volume as well. A gas expands as a result of its molecules moving more quickly when it is heated. The comparison of gas volumes must be done at standard temperature and pressure due to the variation in gas volume caused by variations in pressure and temperature. The definition of standard temperature and pressure (STP) is (273.15K) and 1atm pressure. The volume of one mole of a gas at STP is its molar volume. A mole (6.02 x 10^23 typical particles) of any gas takes up 22.4L at STP.

using ideal gas law:-

PV =nRT

P = 1.00atm

n = 1.00 mol

R = 0.0821 L atm/mol  K

T = 273 K

V = ?

V = nRT/P

V = (1.00 x 0.081 x 273)/1.00

V = 22.4 L

To know more about molar volume refer to:-

https://brainly.com/question/24780351

#SPJ10

How many sublevels inn the second energy level?

Answers

There are two subshells that are s and p, which are present in the second energy level.

The energy level can be defined as the fixed distances from the nucleus of an atom where electrons may be found. Each energy level is divided into some Subshells. These subshells are known as s-subshell, p-subshell, d-subshell, and f-subshell. This subshell contains some orbitals, these orbitals are the place where there is the maximum probability of getting the electrons. In one orbital, a maximum of two electrons can be present.

Hence, there are two subshells in the second energy level.

Learn more about subshells here:

https://brainly.com/question/26438203

#SPJ10

How many moles of electrons are transferred when 2.0 moles of aluminum metal react with excess copper(II) nitrate in aqueous solution to form Al(NO3)3(aq) and Cu(s)

Answers

Moles of electrons:

The moles of electrons that are transferred are 12F

A balanced equation:

2 moles of Aluminium metal react with excess copper(II) nitrate.

[tex]2Al + 3Cu{(NO_3)}_2 \rightarrow 2Al{(NO_3)}_3 +3 Cu[/tex]

Given:

Moles of Aluminium = 2

As Aluminium goes from 0 to +3 oxidation state

[tex]Al \rightarrow Al^{3+} + 3e^-[/tex]

And copper goes from +2 to 0

[tex]Cu^{2+} + 2e^-\rightarrow Cu[/tex]

On balancing the number of electrons we get:

For 1 mole of Al [tex]6e^-[/tex] is required.

Therefore for 2 moles of Al,

Total [tex](2\times6)[/tex]F mole of electrons

Where F= Faraday's constant= 96500 C

So, 12F moles of electrons are transferred.

Learn more about Faraday's Law here,

https://brainly.com/question/27985929

#SPJ4

what is the molarity of the NaOH

Answers

the answer is:

40 g/mole

All of the following are anthropogenic greenhouse gases except Group of answer choices a. carbon dioxide. b. molecular oxygen. c. chlorofluorocarbons (CFCs). d. methane.

Answers

Answer:

c

Explanation:

its not a plant based gas

Which of the following is a ketone?

Answers

Answer:

b

Explanation:

b is the ketone because it is and that's a fact

Answer:

D

Explanation:

Ketones are a class of organic compounds that have an Oxygen double bonded to the middle of the main carbon chain.

Option A is not a ketone (despite having an Oxygen double bonded to the middle of the main carbon chain) because it has an adjacent single bonded Oxygen in the main carbon chain.  This type of compound is classified as an "Ester".

Option B is not a ketone, but is instead classified as an aldehyde, a group of compounds with their Oxygen double bonded at the end of the main carbon chain.

Option C is not a ketone (despite having an Oxygen double bonded to the middle of the main carbon chain), but is instead classified as an Carboxylic Acid, because it has an adjacent single bonded Oxygen in the main carbon chain, and both of these pieces (with the single bonded O pointing outward) are at the end of the main carbon chain.

Option D is a ketone because it does have an Oxygen double bonded somewhere to the middle of main carbon chain, not at an end, and not with another Oxygen single bonded adjacently in the carbon chain.  Specifically, this ketone is "2-pentanone" or "methyl propyl ketone"

(a) write the net acid-base reaction that occurs when hi is added to water. (use the lowest possible coefficients. omit states-of-matter in your answer.)

Answers

The net acid-base reaction that occurs when HI is added to water is HI(aq) + H2O(l) ⇄ H3O^+(aq) + I^-(aq).

What is an acid base reaction?

A acid base reaction involves the transfer of a proton in the Bronsted- Lowry sense. In this case, the acid is the lone pair donor while the base is the lone pair acceptor.

Thus;

HI(aq) + H2O(l) ⇄ H3O^+(aq) + I^-(aq). This the  net acid-base reaction that occurs when HI is added to water.

Learn more about acid base reaction:https://brainly.com/question/15220646?

#SPJ11

The net acid-base reaction that takes place when HI is added to water is HI(aq) + H2O(l) ⇄ H3O^+(aq) + I^-(aq).

What is an acid-base reaction?

An acid-base reaction involves the shift of a proton in the Bronsted Lowry sense. The acid is the lone pair giver while the base is the lone pair acceptor(takes the lone pair). The acid and base reaction will rely upon the strength of the acid and base. This eventually means if the reaction is between a strong acid and a weak base then its result will differ from the reaction between a strong acid and a strong base or a weak acid and a weak base.

Therefore; HI(aq) + H2O(l) ⇄ H3O^+(aq) + I^-(aq).

The above-mentioned equation is the net acid-base reaction that occurs when HI is added to water.

Learn more about the acid-base reaction here:

https://brainly.com/question/1056445

#SPJ10

Describe the reasoning behind using phosphorus and boron in conjunction
with one another.

Answers

defective greatest formerly knows sd ghost;

G identify which substitution product is expected to be favored. explain. the product with retention of configuration is expected to predominate slightly, because the leaving group blocks the nucleophile. the inverted product is expected to predominate slightly, due to sn2 competition. the inverted product is expected to predominate slightly, as a result of ion pairs. the product with retention of configuration is expected to predominate slightly, because the leaving group attracts the nucleophile.

Answers

The substitution product that is supposed to be favoured. The product with retention of configuration is expected to predominate slightly because the leaving group blocks the nucleophile.

What is a substitution product?

A substitution product is a product that is gotten from a reaction in which a group of reactants is replaced by another group in the reaction.

Therefore, the substitution product is supposed to be favoured. The product with retention of configuration is expected to predominate slightly because the leaving group blocks the nucleophile.

Learn more about substitution reaction below.

brainly.com/question/10143438

#SPJ1

Identify the reaction type for each unrelated, radical reaction as either initiation, propagation, or termination. Reaction A. A chlorine chlorine bond splits into two chlorine radicals. What type of reaction is reaction A

Answers

A is the initial reaction when a chlorine bond splits into two chlorine radicals.

What are radicals?

In chemistry, a radical is an atom, molecule, or ion that has an unpaired valence electron.

The question is based on Radical Chain Reaction. And these reactions have three different phases: Initiation, Propagation and Termination.

Reaction A- Initiation

Reaction B- Termination

Reaction C- propagation

Learn more about the radicals here:

https://brainly.com/question/1369233

#SPJ1

What does it mean when a solution is saturated?
O The container is full.
O No more solute can dissolve in solvent.
O The solute has turned into a solid.
O The solvent has turned into a solid.

Answers

2. No more solute can dissolve in solvent

Answer:

A solution in which the maximum amount of solvent has been dissolved. Any more solute added will sit as crystals on the bottom of the container.

Explanation:

several balls and sticks glued together to represent a molecule

Answers

Answer:

The different elements are represented by their symbols one line shows a single bond and two lines show a double bond. This written representation is called a structural diagram

i hope someone can help me here please don't answer nonsense​

Answers

Answer:

4560 torr

Explanation:

PV = K

4 x 1.5 = k

k = 6

V = k / p

V = 6 / 1

V = 6

atm to torr = 1 to 760

760 x 6 = 4560

Answer:

4560 Torr

Explanation:

Boyle's Law

[tex]\sf P_1 \cdot V_1=P_2 \cdot V_2[/tex]

where:

[tex]\sf V_1[/tex] = initial volume[tex]\sf V_2[/tex] = final volume[tex]\sf P_1[/tex] = initial pressure[tex]\sf P_2[/tex] = final pressure

Given:

[tex]\sf V_1[/tex] = 4 L[tex]\sf V_2[/tex] = 1 L[tex]\sf P_1[/tex] = 1.5 atm

Substituting the given values into the formula:

[tex]\implies \sf 1.5 \cdot 4=P_2 \cdot 1[/tex]

[tex]\implies \sf P_2=6\:atm[/tex]

To convert atm to Torr, multiply atm by 760:

[tex]\implies \sf P_2=6\cdot 760=4560\:Torr[/tex]

Which formula represents the compound commonly known as phosphine with iupac name phosphorus trihydride? ph ph2 ph3 ph4

Answers

C. PH3 represents a compound commonly known as phosphine, whose IUPAC name is phosphorus trihydride.

What type of bond is PH3?

The electronegativity of PH3 found in the Periodic Table of the Period attracts covalent electron pairs and creates covalent bonds. However, because the electrons are not bound, asymmetrical rate distribution occurs. Therefore, PH3 is a polar molecule with a non-polar covalent bond and currently has no polar bond.

What defines a covalent bond?

A covalent bond consists of sharing one or more electron pairs between two atoms. These electrons are attracted to two nuclei at the same time. Covalent bonds are formed when the difference in electronegativity between two atoms is too small for electron transfer to form ions.

Click here for more information on covalent bonds https://brainly.com/question/12732708

# SPJ10

Answer:

C.) ph3

Explanation:

Other Questions
Preform the indicated operation.(2x+y)(3 x + y) Dihybrid crosses??? pls tell this answers Read the sentence. it always makes some students uncomfortable. which revision best establishes clarity? taking tests makes us uncomfortable. it always makes some students uncomfortable taking tests. it always makes some students, taking tests, uncomfortable. taking tests always makes some students uncomfortable. A breastfeeding mother is worried that her baby will develop food allergies if she eats peanuts or tree nuts before breastfeeding. Food allergies do not develop after breastfeeding, but they do develop if the infant is formula fed. Current evidence regarding breastfeeding and food allergies states that Si en un autobs hay disponibles solo tres asientos y siete personas estn de pie De cuntas maneras distintas podran ocupar esos asientos? Simplify24xy6xfor all x = 0. Camacho is buying a monster truck. The price of the truck is x dollars, and he also has to pay a 13%, percent monster truck tax. Which of the following expressions could represent how much Camacho pays in total for the truck? which statement about hormone replacement therapy is true? Question 13 of 32Which of the following is an example of a healthy dating relationship?OA. One person convinces the other that they are meant to be togetherforever.B. One person insists that they split the check for a meal.OC. One person insists that he or she get a goodnight kiss.OD. One person pressures the other into stepping outside his or hercomfort zone.SUBMIT Justify the following statement - 'You can't always tell if a person has an intellectual disability by looking at them.' . Write a paragraph (three to five sentences) to explain how your allocation of Marc andJulian's portfolio matches their investment goals and priorities. (12 points) 128 (4 + 2) = (128 4) + 2A. TrueB. False Meeting planners might find themselves doing all of the following except:1.arranging for technical and audiovisual needs2.establishing agenda, objectives, and budget3.establishing policies and programs for business travel4.working with vendors to secure locations The basic difference between consumer goods and capital goods is that Multiple Choice consumer goods satisfy wants directly, while capital goods satisfy wants indirectly. an economy that commits a relatively large proportion of its resources to capital goods must accept a lower growth rate. consumer goods are produced in the private sector and capital goods are produced in the public sector. the production of capital goods is not subject to the law of increasing opportunity costs. Which of the following rational functions is graphed below? Draw a graph of y=3x-2. Using a scale of 2cm to 5units on both axes for values from x -2 to +2What is the x-interceptWhat is the y- interceptFind the value of x when y= 5Find the value of y when x= 0.5pls pls ASAP Before his assassination, KennedyO saw victory in Vietnam as certain.O supported all of Ngo Dinh Diem's actions on principle.O aggressively pursued policies to increase the fighting in Vietnam.O actively attempted to end the Vietnam War.O questioned the wisdom of involvement in Vietnam. In a _________________________ economy, the individuals and the government share in the economic decision-making process. These groups work togther to ensure economic development. A rocket is fired with an initial Velocity OF 100m/s at an angle OF 55 above the horizontal, It explodes on the mountain Side 12s after its Firing What is x-and y-coordinates of the rocket relative to its Firing point?