Describe how the production of a gas (carbon dioxide) suggests a chemical change
occurred?

Answers

Answer 1
When matter changes it is considered a chemical change. For example if a liquid or solid changes to a gas it indicates a chemical change because the atoms that make up the substances are undergoing change.

Related Questions

Lead has a density of 11.29 g/mL. If you had 186 g of lead, what would its volume be?

Answers

I think you just do 11.29 multiplied by 186 since to find density you divide mass by volume. So 186 divided by x is 11.29. So in conclusion the volume would be 2,099.94mL

Review the information from the documents you read for this assignment. Use what you learned to answer the following question. What were the major effects of a dust storm? Give your answer in at least four sentences.

Answers

Answer:

what people experienced during a dust storm

how people reacted to a dust storm

what people did after a dust storm

Explanation:

i passed

Answer:

what people experienced during a dust storm

how people reacted to a dust storm

what people did after a dust storm

Explanation:

the protein’s specific sequence is?

Answers

Answer:

The linear sequence of amino acids within a protein is considered the primary structure of the protein. Proteins are built from a set of only twenty amino acids, each of which has a unique side chain. The side chains of amino acids have different chemistries.

Hope this helps

What is the average acceleration of the car between 24 and 40 seconds? Include the correct units.

Answers

Answer:

16

Explanation:

40 - 24  16

Elements in the same period in the same periodic table have the same ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Answers

Elements in the same period have the same number of electron shells; moving across a period (so progressing from group to group), elements gain electrons and protons and become less metallic. This arrangement reflects the periodic recurrence of similar properties as the atomic number increases.

PLEASE MARK ME BRAINLIEST ANSWERER

why are there no elementary substances that have the ionic bond?

Answers

This problem is asking for the reason behind the nonexistence of elementary substances with ionic bonds. First of all, it is necessary to bear to mind that the definition of the type of bond in a compound depends on the difference electronegativity that is present between two of the atoms composing it.

For instance, in binary salts, such as KCl, NaCl, KBr and so on, we are able to know these are all ionic because they are composed by a metal and a nonmetal, which have the smallest and largest electronegativities, so that the difference electronegativity is large enough to produce an ionic bond.

In contrast, elementary susbtances, such as liquid bromine (Br2) and gases such as H2, N2, Cl2, F2 and O2, since they are all nonmetals and the same type, the electronegativity difference will be 0 and therefore, they will not be ionic but covalent.

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hii what the procedures of making organic fertilizer and its precautions. can u answer it i kinda need it now

Answers

Answer:

Go through your kitchen waste. Vegetables and fruit peelings are the number one food remnants you should keep aside. ...

Add other organic materials to the compost. ...

Collect some garden waste. ...

Create the compost. ...

Apply the fertilizer.

Answer:

Abstract

Organic fertilizers are an essential source for plant nutrients and a soil conditioner in agriculture. Due to its sources and the composition of the organic inputs as well as the type, functionality and failures of the applied treatment process, the organic fertilizer may contain various amounts of infectious agents and toxic chemicals, especially the antibiotics that can be introduced to the subsequent food chain. A range of human and animal pathogens of bacterial, viral and parasitic origin have been the cause of food-borne epidemics due to unintended contamination from organic fertilizers. The use of antibiotics by humans and in animal feeds will also end up in the organic fertilizers. These antibiotics and other chemicals, depending on the sources of the organics, will enhance the likelihood of occurrence of resistant and multi-resistant strains of microorganisms in society and have been reported to cause ecotoxicological environmental effects and disruption of the ecological balance. Exposure of microorganisms to sublethal concentration of antibiotics in the organic products induces antibiotic resistance. WHO guidelines for the reuse of excreta and other organic matters identify the risk for the exposed groups to the reuse of the

Explanation:

how might rising atmospheric co2 concentrations lower the ph of the oceans?

Answers

Explanation:

As CO2 concentrations rise, excess CO2 is absorbed by the oceans. CO2 in the oceans can react chemically with water to form acid. ... The difference in pH units between two acidic solutions is three.

Darwin observed __________________ types of mockingbirds and finches lived in different island environments.

Answers

Answer:    

Darwin observed   many  different   types of mockingbirds and finches lived in different island environments.

How many molecules are in 0.79 moles of NH4?

Answers

Answer:

14

Explanation:

5. How could you use Kepler's 3rd Law to find the relationship between all of the
moons of Jupiter?

Answers

Answer:

essentially through the use of keplers 3rd law comparing the proportionality of a planets squared versus cubed orbital patterns you can determine how fast a planet will orbit something and complete a full orbit

Explanation:

Kepler's Third Law: the squares of the orbital periods of the planets are directly proportional to the cubes of the semi-major axes of their orbits. Kepler's Third Law implies that the period for a planet to orbit the Sun increases rapidly with the radius of its orbit. (from NASA)

The reaction is at dynamic equilibrium.
N2 + 3H2 ⇌ 2NH3

Which statement is correct?

(1 point)

The solution has the same concentrations of nitrogen gas and ammonia.
The solution has the same concentrations of nitrogen gas and ammonia.

Nitrogen and hydrogen combine at the same rate that ammonia breaks down.
Nitrogen and hydrogen combine at the same rate that ammonia breaks down.

The solution has the same concentrations of nitrogen and hydrogen gases.
The solution has the same concentrations of nitrogen and hydrogen gases.

Both directions of the reaction have stopped.
Both directions of the reaction have stopped.

Answers

When the reaction N₂ + 3 H₂ ⇌ 2 NH₃ is at dynamic equilibrium, Nitrogen and hydrogen combine at the same rate that ammonia breaks down.

The reaction is at dynamic equilibrium.

N₂ + 3 H₂ ⇌ 2 NH₃

Which statement is correct?

The solution has the same concentrations of nitrogen gas and ammonia. NO. Even though we don't know the equilibrium constant, it is unlikely that N₂ and NH₃ have the same concentrations at equilibrium. Nitrogen and hydrogen combine at the same rate that ammonia breaks down. YES. At the equilibrium, the forward rate is equal to the reverse rate. The solution has the same concentrations of nitrogen and hydrogen gases. NO. Even though we don't know the equilibrium constant, it is unlikely that N₂ and H₂ have the same concentrations at equilibrium. Both directions of the reaction have stopped. NO. The reactions don't stop because the equilibrium is dynamic.

When the reaction N₂ + 3 H₂ ⇌ 2 NH₃ is at dynamic equilibrium, Nitrogen and hydrogen combine at the same rate that ammonia breaks down.

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A compound is 2. 00% H by mass, 32. 7% S by mass, and 65. 3% O by mass. What is its empirical formula? The first step is to calculate the mass of each element in a 100-g sample of the compound. We use 100 g because it makes the calculations more straightforward. What is the mass of each element in a 100. 0-g sample of the compound? mass H = g mass S = g mass O = g.

Answers

Answer:

We assume that there is 100g of the compound (because it makes it easier to calculate) and we turn the percentages into grams.

2% of Hydrogen = 2g of H

32.7% of Sulfur = 32.7g of S

65.3% of Oxygen = 65.3g of O

Now we change the mass of these elements to moles by dividing the mass by the molar mass (which is the value of atomic mass on your periodic table)

2g/1.01g = 1.98 mol

32.7g/32.06g = 1.02 mol

65.3g/16g =4.08 mol

divide all these mol values by the smallest mol value, which is 1.02. (Round the values to whole numbers)

1.98/1.02 = 2 (rounded) of Hydrogen

1.02/1.02 = 1 of Sulfur

4.08/1.02 = 4 of Oxygen

H2SO4 (also known as sulphuric acid) is your empirical formula.

how many electrons need to be lost or gained by Ca to attain noble gas electron configuration?

Answers

Answer:

six electrons need to be gained

Explanation:

Calcium has two valence electrons. To have a stable amount of valence electrons, or to attain noble gas electron configuration, an element needs to have eight valence electrons. Now, it's just a simple math problem. How many  more valence electrons does calcium need to get to eight? It needs six, since eight minus two is six.

Hopefully that's helpful! :)

In the chloroplast, energy in sunlight is passed around different chlorophyll molecules until it reaches a specific chlorophyll molecule that can transfer energy in sunlight to an energized electron. This chlorophyll molecule is called the accessory pigment. electron-carrier molecule. nucleus. photoelectric point. reaction center.

Answers

Answer:In the chloroplast, energy in sunlight is passed around different chlorophyll molecules until it reaches a specific chlorophyll molecule

Explanation:

Answer: In the chloroplast, energy in sunlight is passed around different chlorophyll molecules until it reaches a specific chlorophyll molecule

Atoms: SC.8.P.8.7

Match the definition to proper definition:

Term:

Definition:

1. Atoms

A.Positive subatomic particles found in the

nucleus of the atom

2. Neutron

B. Negative subatomic particle found in the cloud

3. Proton

C. Substance that has no electrical charge

4. Nucleus

D. Basic building block of all matter

5. Electron cloud

E. Substance that consists of only one type of ato,

6. Electrons

F. Center of an atom with a positive charge

G. Outside of the atom with a negative charge

7. Element

Answers

Answer:

1 = D

2 = C

3 = A

4 = F

5 = G

6 = B

7 = E

Which over lappings are present in carbon(iv)oxide molecule

Answers

Answer:

the double carbon to oxygen bond

what do you mean by decimal number system

please give answer​

Answers

The decimal number system also called Hindu-Arabic number system or Arabic number system, comprises digits from 0-9 that are 0, 1, 2, 3, 4, 5, 6, 7, 8 & 9.

2. Calculate the heat of combustion of C6H14(l) in kJ/mol if 1.66 g of C6H14(l) were ignited in a calorimeter containing 2750. g H2O. A 3.54˚C temperature rise was observed. The calorimeter constant is 11.2 kJ/˚C. The specific heat of water is 4.184 J/g˚C.

Answers

This problem is describing the combustion experiment where by the heat of combustion of 1.66 g of liquid C6H14 can be calculated via calorimetry. The calorimeter (C=11.2kJ/°C) contains 2750. grams of water with a temperature rise of 3.54 °C, it means we can calculate the total heat released by the combustion of this hydrocarbon via:

[tex]Q_{combustion}=-(Q_{calorimeter}+Q_{water})[/tex]

Because the heat of combustion is released to the water and the calorimeter. Next, we break down each heat and subsequently plug in the given values:

[tex]Q_{combustion}=-(11200\frac{J}{\°C}*3.54\°C +2750.g*4.184\frac{J}{g\°C}*3.54\°C )\\\\Q_{combustion}=-80,379J=-80.4kJ[/tex]

After that, we calculate the moles of C6H14 by considering the given mass and its molar mass (86.18 g/mol):

[tex]n=1.66g*\frac{1mol}{86.18g} =0.01926mol[/tex]

And finally, we divide the total heat of combistion by the moles to get the heat of combustion:

[tex]\Delta H_{comb}=\frac{-80.4kJ}{0.01926mol} =4,174\frac{kJ}{mol}[/tex]

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PLZ HELP i need it now

Answers

If maybe you can state what you’re writing about

anyone have any ideas on what i should draw for my art project please let me know

Answers

Answer:

A pumpkin or a deer cus it's hunting season

Birds, Scenerys, Fish, Planets, Seas, Trees, Butterflys, BTS, Fruits, Cactus! Drawing Ideas: Imagination

Draw an object and give it a face.

Create an alternate cover to your favorite book or album.

Illustrate a scene from your favorite song.

Draw a scene or character from your favorite book.

Illustrate your favorite fairy-tale.

Invent your own insects.

Draw an intricate made up flower.

Hope this helps!

What products would you expect from the reaction of ammonia and sulfuric acid in aqueous solution

Answers

Answer:

(NH4)2SO4

Explanation:

2NH3(aq) + H2SO4 (aq) ---> (NH4)2SO4(aq)

Ammonia reacts with sulfuric acid to give the fertilizer ammonium sulfate.

What were the first 5 planets that were observed? Why were those the only ones? Help pls!

Answers

Mercury Venus mars Jupiter Saturn

Study the chemical equation.
Na + Cl2 → NaCl
Is the chemical equation properly balanced?

Answers

no it should be Na2Cl

Determine the pH of 7.53 x 10-4 mol/L calcium hydroxide solution

Answers

Answer:

pH = 11,17

Explanation:

[tex][OH^{-} ] = \frac{n_{OH^{-} } }{V} = \frac{2n_{Ca(OH)_{2} } }{V} = 2[ Ca(OH)_{2} ]\\[/tex]

[tex]Ca(OH)_{2}[/tex]    →   [tex]Ca^ {2+}[/tex]        +     [tex]2OH ^ -[/tex]

[tex]7,53.10^-4[/tex]   → [tex]7,53.10^-4[/tex]   →    [tex]1,506^-3[/tex]

pOH = -log [[tex]OH^-[/tex]] = [tex]-log 1,506^{-3}[/tex] ≈ 2,822

pH = 14- pOH = 14-2,822 = 11,178

Which of the following is the best definition of deposition in geology?(1 point)

A:the creation of volcanic rock when liquid magma hits the ocean and cools

B:the mixing of many layers of sediment by wind, water or ice


C:laying down of sediment in layers carried by wind, water or ice


D:the creation of any metamorphic rock

Answers

Answer:

Deposition is the laying down of sediment carried by wind, flowing water, the sea or ice. Sediment can be transported as pebbles, sand and mud, or as salts dissolved in water.


11) When sodium metal is subjected to violet light, it causes the photoelectric effect. However, red light does not affect
the sodium. Explain this phenomena.

Answers

The maximum wavelength for which photoelectric effect occurs in sodium is 400 nm.

Photoelectric effect has to do with the ejection of electrons from a clean metal surface when energy is supplied in the form of light. All wavelengths of light are not capable of achieving photoelectric effect.

There exists a maximum wavelength that the incident rays must posses in order for photoelectric effect to occur. The maximum wavelength for which photoelectric effect occurs in sodium is 400 nm.

The wavelength of red light is around 625 - 740 nm which is far longer than the wavelength of violet light which is around 380 - 425 nm. Hence, when sodium metal is subjected to violet light, it causes the photoelectric effect but red light does not affect the sodium metal.

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¿que otro nombre reciben las órbitas?

Answers

Podría decirse que es una elipse con el sol

the electron configuration of an element describes _____.

Answers

Answer:

here

Explanation:

This is the electron configuration of the element carbon.

EASY QUESTION (PLEASE HELP THE INTERNET ISN'T SUCH A BIG HELP RIGHT NOW)
Things microscopes have helped scientists discover about cells.
(No links plz)

Answers

Answer:

Microscopes allowed scientists to observe Prokaryotic cells which make up Bacteria and Archaea.

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