help asap i need help

Answers

Answer 1

Answer:

from producers to consumers

Explanation:

Energy is transferred between organisms in food webs from producers to consumers. The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants

Short answer, don't know but i'm sure the answer is up here

Related Questions

What are the five major lines of latitude?

Answers

Answer: Arctic Circle, Tropic of Cancer, Equator, Tropic of Capricorn, and the Antarctic Circle. Hope this helps.

How many moles of KBr will be produced from 7 moles of BaBr2?
BaBr2 + K2SO4 --> 2 KBr + BaSO4
1 mole KBr
7 moles KBr
3.5 moles KBr
14 moles KBr

Answers

1 mol BaBR2 produces 2mol KBr .

7 mol s of BaBr_2 produces:-

7(2)14mol KBr

Option D is correct

La cantidad de corriente se expresa en...

A. Ohmios.
B. Voltios.
C. Amperios.

Answers

Answer:

Explanation:

Amps measure the flow of Electrons

Answer:

Explanation:

is c

Question 6 of 10
What does it mean when a reaction is spontaneous?
O
A. The reaction requires added energy.
B. The reaction goes to completion.
C. The reaction occurs rapidly.
O O
D. The reaction happens by itself.
SUBMIT

Answers

Answer:

Explanation:

Does not require energy ...may be slow or fast....

Explain how DNA can provide some evidence for evolution.

Answers

The shared ancestry of life is reflected in DNA and genetic code. DNA comparisons can reveal how closely two species are related. Biogeography. Evolution and geological change are reflected in the global distribution of life and the particular characteristics of island species.

The attractions between anions and cations throughout a crystal are known collectively as.

Answers

The attractions between anions and cations throughout a crystal are known collectively as ionic bonds.

What are ionic bonds?

The ionic bonds are a special type of bond where ions (cations and anions) are mutually attracted.

The ionic bonds are fundamental bonds for the development of certain compounds and molecules.

Ionic bonds may be produced between metal compounds that lose electrons (e-) and non-metals that gain e-.

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Grace runs 6 miles in 2 hours. What is her speed?

Answers

About… 20 mph because 6 miles is not a lot and I can do 8 in 1 hour

A Cu/Cu2+ concentration cell has a voltage of 0.21 V at 25 ∘C . The concentration of Cu2+ in the cathode is 1.6×10−3 molL−1 .
What is the concentration of Cu2+ in the anode?

Answers

For a Cu/Cu2+ concentration cell has a voltage of 0.21 V at 25 ∘C, the concentration is mathematically given as

c1=2.7*10^6.77m

What is the concentration of Cu2+ in the anode?

Generally, the equation for the Chemical reaction is mathematically given as

Cu---->cu +2^e O

2e+Cu+2 ---->Cu R

Therefore

[tex]Ecell=\frac{0.0591}{n}log(c2/c1)\\\\0.25=\frac{0.0591}{2}log(1.6*10^{-3}/c1)[/tex]

c1=2.7*10^6.77m

In conclusion, the concentration is

c1=2.7*10^6.77m

Answers

Explanation:

The question had been explained.

Consider the following reaction: 2 Bi(s) + 3 Cl2(g) → 2 BiCl3(s)
How many grams of chlorine gas are required to produce 3.32 grams of bismuth chloride is
produced? Use correct significant digits and units, for example 1.234 g.

Answers

Taking into account the reaction stoichiometry, 1.119 grams of chlorine gas are required to produce 3.32 grams of bismuth chloride is produced.

Reaction stoichiometry

In first place, the balanced reaction is:

2 Bi + 3 Cl₂ → 2 BiCl₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

Bi: 2 molesCl₂: 3 moles BiCl₃: 2 moles

The molar mass of the compounds is:

Bi: 209 g/moleCl₂: 70.90 g/moleBiCl₃: 315.45 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Bi: 2 moles ×209 g/mole=418 g

Cl₂: 3 moles ×70.90 g/mole= 212.7 g

BiCl₃: 2 moles ×315.45 g/mole= 630.9 g

Mass of Cl₂ required

The following rule of three can be applied: If by reaction stoichiometry 630.9 grams of BiCl₃ are formed by 212.7 grams of Cl₂, 3.32 grams of BiCl₃ are formed by how much mass of Cl₂?

[tex]mass of Cl_{2} =\frac{3.32 grams of BiCl_{3}x212.7 grams of Cl_{2} }{630.9 grams of BiCl_{3}}[/tex]

mass of Cl₂= 1.119 grams

Finally, 1.119 grams of chlorine gas are required to produce 3.32 grams of bismuth chloride is produced.

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describe how to separate iron fillings, iron (II) chloride crystals and sulphur powder all separately

Answers

Answer:

1. Place in a platic bag and use a magnet to attract the iron filings. [See explanation for an alternative step].

2. Disolve the remainer in water

3. Pass the liquid through a microporous filter to capture the undissolved sulfur

4. Evaporate the filtered water to retrieve iron chloride crystals

Explanation:

The Fe(II) chloride will dissolve in water. It is paramagnetic, and thus is weakly attracted to a magnet. The process above should not result in attracting the solid Fe(II) crystals. In fact, it is probably acceptable to dissolve the entire sample in water as the fisrt step. The dissolved Fe(II) chloride should also not be strongly attraced to a magnet, and htis step would allow easier separation of the iron filings.

Sulfur is not soluble in water, so it will collect as a dsolid in the microporous filter.

The Fe(II) has a high solubility, so it will wind up in the filtered soluition. Evaopate using heat or vacuum to retrieve the solid Fe(II) chloride crystals (they will be hydrated).

2) The coregion in the area of the Texas Panhandle. This coregion is level plates that ranges in elevation from 3000 to 4500. This is very fry dry and
the characteristics of this coon we would expect to see plenty of
A) wind ersoin
B) water ersoin
C) deposition of sediment

Answers

Answer:

the correct answer is B po sure po ako

Explanation:

Sure na sure po

Answer:

The map shows the various ecoregions of Texas. Which ecoregion is most vulnerable to wind erosion from hurricanes originating in the Gulf of Mexico? desert. A.

Explanation:

How many energetically equivalent ways can you distribute the particles in system a?.

Answers

The number of energetically equivalent ways that one can distribute the particles in system A and B are 1 and 6 respectively.

How to calculate the number of ways?

From thx complete information, system A has only 1 distribution that's possible.

For system B, the number of ways will be:

= 3 × 2 × 1

= 6

In conclusion, the correct options are 1 and 6 respectively.

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The co32- ion is an example of a polyatomic ion with ________. a. a nonpolar bond b. linear structure c. resonance structures d. triple bonds

Answers

The Co32- ion is a polyatomic molecule and have resonance structure

What is resonance structure?

Resonance structures refer to different sets of Lewis structures that depict and explain the delocalization of electrons in a polyatomic ion or a molecule.

What are polyatomic molecules?

Polyatomic molecules are molecules that are electrically neutral and have three or more atoms held together by covalent bonds. Examples are So3, Co3 and so on.

Therefore, The Co32- ion is a polyatomic molecule and have resonance structure.

Learn more about resonance structure here.

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during lanslides rock and soil are?

Answers

Answer:

Getting carried down a moutain side or a cliff and they are relocated.

Explanation:

Glaciers are responsible for moving rocks from one place to another

In a typical mammalian cell, the net transport by the sodium-potassium exchange pump that maintains the 70 mv membrane potential is 500 singly charged ions per second.

Answers

For a typical mammalian cell, the net transport by the sodium-potassium exchange pump, Work done is mathematically given as

W= 5.6*10-18 J

How much work does the pump do each second?

Generally, the equation for the Potential difference is mathematically given as

Potential difference = Work done / Charge

Therefore

W=q*P.d

Q= 500 * 1.6*10-19 C

P.d. = 70 mV

In conclusion,Workdone

W500 * 1.6*10-19 * 70*10-3

W= 5.6*10-18 J

Answers

Answer:

Law of Conservation Matter

Question 4 of 10
What effect does adding a solute have on the freezing point of a solution?
A. The solution will not reach a freezing point temperature.
B. The temperature at which the solution freezes is raised.
C. The temperature at which the solution freezes is lowered.
D. The temperature at which the solution freezes is unchanged.

Answers

Answer:

C. The temperature at which the solution freezes is lowered.

How many molecules are in 50.000 g of aspartame?

Answers

Aspartame stands for C_14H_18N_2O_5

Molar mass:-

14(12)+18(1)+2(14)+5(16)168+18+28+80294g/mol

No of moles:-

Given mass/molar mass50000/294170mol(Approx)

No of molecules:

No of moles×Avagadro no170×6.022×10²³1023.7×10²³1.02×10²⁶molecules

Balance the equation first.

N2 + H2 -> NH3

a) Find how many moles of NH3 are produced when 4.9 moles of N2 are completely reacted with hydrogen.

b) how many moles of H2 are required to produce 59.4 moles of NH3?

Answers

Answer:

Therefore, 12 moles of hydrogen makes 8 moles of ammonia.

Using the proportions of the amount of the molecules, we can convert from any reagent or product to any other reagent or product. In the context of this reaction, for every mole of N2 and every 3 moles of H2 we obtain 2 moles of NH3.

Explanation:

;)’ hola

Carbon 14 decays to Carbon 12 and has a half-life of 5730 years. If a fossil is analysed and it has 5 grams of Carbon 14 and 15 grams of Carbon 12, how old is the fossil?

Answers

Answer:

im sorry but this question doesnt make sense

Explanation:

Choose the correct option:

Answers

Answer:

i think your answer is d

Explanation:

sorry if it is wrong

50. g of NaNO3 was dissolved in 1250 mL of water.
What is the molality of the solution? (Molar mass of
NaNO3 = 85 g/mol; Density of water = 1.00 g/mol)
m.
Your answer should be rounded to two significant figures. Do not
include units in your answer.

Answers

Answer:

.47

Explanation:

I just took a test that asked this exact same question and I got it right.

4. One mole of H2O has a mass of 18g. How many moles of H,0 are there in 54g of
H2O?

Answers

Answer: 3 moles

Explanation: Divide 54 by 18 to get 3.

What makes an acid a strong acid in water makes a base or weak base

Answers

It’s ph level on the ph scale. 1-3 is a strong acid, 4-6 is a weak acid, 7 is neutral, 8-10 is a weak base, and 10-14 is a strong base.

Acids or bases with strong bonds remain as molecules in solutions known as weak acids or bases. The acids or bases with weak bonds easily dissociate into ions and are called strong acids or bases.

What is acid or base?

Acid is proton donor hydrogen containing substance. Base is proton acceptor molecule.

It can be predicted by pH indicator. pH with value less than 7 indicate acidity and value with more than 7 denotes base, and the one with value 7 is considered as neutral.

Thus, based on bond strength and its dissociation in the water makes it strong acid or weak base.

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9. A 2.00 L flask is filled with propane gas (CH) at a pressure of 1.00 atm and a
temperature of -15.0°C. What is the mass of the propane in the flask?

Answers

the correct amswer is 4.17g

What is the oxidation number of chromium in sodium dichromate, na2cr2o7?.

Answers

Answer:+6

Explanation:Oxygen always has an ON of -2 so when there’s O7 the total is -12. Sodium is in group 1 so has an ON of +1 that means with two of them it’s overall ON is +2. When you combine the two that equals -12 but you want it to equal 0. So it would be +12. Considering there are two chromium present you would divide that by 2 making the answer +6.

how many grams is 1.25 moles of NaCl

Answers

Molar mass of NaCl:-

23+35.558.5g/mol

Now

Mass=Molar mass ×MolesMass=125(58.5)Mass=7312.5g

Why do chemist prefer to use kipp’s apparatus for the production of hydrogen sulphide instead of woulf’s bottle??

Answers

Chemist prefer to use kipp’s apparatus for the production of hydrogen sulphide instead of woulf’s bottle because they produce gas without generating heat.

What is kipp's appratus & woulf's bottle?

Kipp's appratus and woulf's bottle both are the laborartory appratus and used in the analytical process of any reactions.

Hydrogen sulphide gas will be produced in the laborartory by using both given appratus but we prefer the use of kipp's apparatus because in this apparatus small amount of gas is produced in the controlled heat condition by the reaction between the liquid sulphuric acid and solid iron sulphide.

Hence we prefer kipp's appratus as it produces gas without heat.

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a gas that has a pressure of 7.5 atm and a volume of 20L what would be the new volume if the pressure was changed to 3.5 atm

Answers

Answer: 43 L

Explanation:

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