is carbon dioxide from a fire extinguisher a physical or chemical change?

Answers

Answer 1

Answer:

Fire is a chemical reaction between oxygen and the fuel. If you want to put out a fire, just get rid of one of those three things – fuel, oxygen or heat. ...It also prevents oxygen from reaching the fuel. Most fire extinguishers work by separating the fuel from the oxygen.

Explanation:

Answer 2

Answer:

It is a chemical change

Explanation:


Related Questions

Let's start by figuring out the amount in miles. From there, we can easily find the equivalent mass. Which equation do we need to find out how many moles of NH4Cl would there be in 500 mL of a 0.300 M solution of it?

A. n=C x V
B. C=V x n
C. C=n x V
D. n=C / V

Answers

Answer:

A. n= C x V

Explanation:

Molarity of a solution is the molar concentration of that solution. It can be calculated using the formula:

M = n/V

Where;

M = molarity (M)

n = number of moles (n)

V = volume (mL)

To calculate the number of moles from a given molarity value and volume, we say:

n = M × V

For this case of NH4Cl;

V = 500mL = 500/1000 = 0.5L

M = 0.300 M

n = 0.300 × 0.5

n = 0.15moles

Answer: n=CxV

Explanation:

What is the volume of .750 M hydrochloride acid required to react completely with 25.00 mL of .290 M NaOH solution?

Answers

from

HCl + NaOH----> NaCl +H2O

n of acid=1

n of base=1

Molarity of acid=750M

Molarity of base=290M

volume of base=25ml

from

Va=Mb ×vb×na

Ma×nb

Va=290×25×1

750×1

Va=7250

750

Va=9.67ml

The volume of .750 M hydrochloride acid is required to react completely with 25.00 mL of .290 M NaOH solution is 9.67ml

HCl + NaOH----> NaCl +H2O

n of acid=1

n of base=1

Molarity of acid=750M

Molarity of base=290M

volume of base=25ml

Therefore,

Va=Mb ×vb×na

Ma×nb

Va=290×25×1

750×1

Va=7250

750

Hence,

Va=9.67ml

What is Hydrochloric acid?

Hydrochloric acid, also known as muriatic acid, is an aqueous solution of hydrogen chloride. It is a colorless solution with a distinctively pungent smell. It is classified as a strong acid. It is a component of the gastric acid in the digestive systems of most animal species, including humans. Hydrochloric acid is an important laboratory reagent and industrial chemical.

Learn more about Hydrochloric acid

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What is the concentration of a solution made by combining 52 grams of NaCH3COO with 150 mL of water?

Answers

Answer: The concentration of a solution made by combining 52 grams of  [tex]NaCH_{3}COO^{-}[/tex] with 150 mL of water is 4.22 M.

Explanation:

Given: Mass = 52 grams

Volume = 150 mL (1 mL = 0.001 L) = 0.150 L

Molarity is the number of moles of a substance present in liter of a solution.

And, moles is the mass of a substance divided by its molar mass.

Hence, moles of [tex]NaCH_{3}COO^{-}[/tex] (molar mass = 82.034 g/mol) is as follows.

[tex]Moles = \frac{mass}{molar mass}\\= \frac{52 g}{82.034 g/mol}\\= 0.633 mol[/tex]

Therefore, concentration of given solution is as follows.

[tex]Molarity = \frac{moles}{Volume(in L)}\\= \frac{0.633 mol}{0.150 L}\\= 4.22 M[/tex]

Thus, we can conclude that the concentration of a solution made by combining 52 grams of  [tex]NaCH_{3}COO^{-}[/tex] with 150 mL of water is 4.22 M.

what are some different natural events and man-made activities that can affect ocean acidification?

Answers

Some man made events are activities that include the burning of fossil fuels, deforestation and vehicle emissions.
Natural events are earthquakes,floods, wildfires

Ocean acidification is the process of decreased pH levels of the oceans. The burning of fossil fuels and industrialization are man-made activities that lead to this process.

What is Ocean acidification?

Ocean acidification is an increased concentration of acidic components of the oceans due to an increase in the carbon dioxide level of the oceans.

Human activities like cutting down a large number of trees, discharging from industrial outlets, and burning fossils like petrol, coal, diesel, etc. are leading to increased acidification of the oceans.

Therefore, natural causes like increased salinity, flood, and earthquake are the reasons for oceanic acidification.

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how many moles of H2 are required to make 10 moles of water?​

Answers

Explanation:

10 moles h20 is required

10 moles of H₂ are required to make 10 moles of H₂O.

What is Stoichiometry ?

Stoichiometry is an important concept which helps us use the balanced chemical equation to measures the amount of reactants and products.

What is Balanced Chemical equation ?

A balanced chemical equation is chemical equation that has equal number of atoms on both sides of arrow that is reactant and product.

First we have to write the Balanced chemical equation

2H₂ + O₂ → 2H₂O

To produce 2 moles of water, 2 moles of hydrogen are required to produce 10 moles of water.

So,

[tex]\frac{2\ \text{moles of}\ H_2}{2\ \text{moles of}\ H_2O}[/tex] × 10 moles of H₂O

= 10 moles of hydrogen are required.

Thus, from above conclusion we can say that 10 moles of H₂ are required to make 10 moles of H₂O.

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An apple has been left out, and it is starting to rot. Which of the following is the best method to slow down the chemical changes that are occurring?

The best method is to keep rinsing the apple with water every hour.
The best method is to keep the apple in a cooler place.
The best method is to put the apple in the sun to warm it up.
The best method is to wrap the apple in plastic.

Answers

It’s B just answered that question correctly

If the power source in a motor was to be replaced with an electrical load, and the armature was turned by hand, then what device have you made?

Answers

Answer:

This question doesnt make much sense but ill try to answer it.

A brushed DC electric motor is an internally commutated electric motor designed to be run from a direct current power source. Brushed motors were the first commercially important application of electricity. If the shaft of a DC motor is turned by an external force, the motor will act as a generator. DC Motor rotation does have to do with the voltage polarity and the direction of the current flow.

Consider the redox reaction below talking place in certain electro chemical cell: Cu(s)+cu^2+(aq) -------> Cu^2+(aq) + Cu (s)

Answers

Answer:

cu+2 ------ oxidation whereas Cu ------ reduction.

Explanation:

In the reaction, cu+2 is the place where oxidation occurs because this cupric ion losses electrons  which causes +2 charge on it. we know that oxidation is the loss of electrons and reduction is the gaining of electrons so the Cu is the place or atom at which reduction occurs. Electrochemical cells have two electrodes, which is anode and the cathode. The anode is the electrode where oxidation occurs whereas the cathode is the electrode where reduction takes place.

The pH of a solution with a [OH-] of 1x10^-6 is

Answers

Answer:

pH = 6

Explanation:

Given that,

The concentration of [OH]⁻ ion is [tex]10^{-6}[/tex].

We need to find the pH of the solution.

We know that,

[tex]pH=-\log[OH]^-[/tex]

Put all the values,

[tex]pH=-\log(10^{-6})\\\\pH=6[/tex]

Hence, the pH of the solution is 6.

The atoms of which element bond to one another in chains, rings, and networks?
1.
barium
2.
carbon
3.
iodine
4.
mercury
Submit An:

Answers

The answer is 2. Carbon.

the act of salt and sugar dissapering in water is called​

Answers

Answer:

dissolving

Explanation:

Answer:

dissoliving

Explanation:

salt and sugar are both soluble

True or false:
The following equation is balanced properly: 6CO2 + 6H2O → C6H12O6 + O2

Answers

No as oxygen is not balance
In reactants side there is 12 oxygen and in the product side there is 8 oxygen

How many milliliters of 1.5 M H.So, are needed to exactly
neutralize 20. milliliters of a 0.8 M KOH solution?

Answers

Answer: A volume of 10.66 mL of 1.5 M H is required to exactly neutralize 20. milliliters of a 0.8 M KOH solution.

Explanation:

Given: [tex]M_{1}[/tex] = 1.5 M,     [tex]V_{1}[/tex] = ?

[tex]V_{2}[/tex] = 20 mL,         [tex]M_{2}[/tex] = 0.8 M

Formula used to calculate the volume is as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]

Substitute the values into above formula as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}\\1.5 M \times V_{1} = 0.8 M \times 20 mL\\V_{1} = 10.66 mL[/tex]

Thus, we can conclude that a volume of 10.66 mL of 1.5 M H is required to exactly neutralize 20. milliliters of a 0.8 M KOH solution.

_ As + _ NaOH → _Na3AsO3 + _H2

Answers

Yesssssssssssssssssssssss

A reaction requires 22.4 L of gas at STP . There are 25.0 L of gas at 101.5 kPa and 373 K.

Which statement is true?

Use the ideal gas law: PV = nRT where R = 8.31 L-kPa/mol-K

A. There is not enough gas for the reaction.

B. Given this information, there is no way to tell if there is enough gas for the reaction.

C. There is excess gas for the reaction.

D. There is enough gas for the reaction.

Answers

Answer:

STP is 101.325 kPa pressure and 273K temperature

Also, at STP, 1 mol of an ideal gas = 22.4 L

Since the question states that 22.4 L are needed at STP, we know that ONE MOLE is needed.  Now, the question is, how many moles are actually present?

V = 25.0 L

P = 101.5 kPa

T = 373K

n = ?

R = 8.31 L-kPa/Kmol

Solving the ideal gas law for n (moles) and comparing that to 1 mole, we have...

n = PV/RT = (101.5)(25.0)/(8.31)(373)

n = 0.82 moles of gas.  THIS IS NOT ENOUGH as it is less than the ONE mole required.

Explanation:

Aqueous solutions of a strong acid and a weak acid of equal concentrations are compared. Which of the following statements are true?

I. The strong acid reacts with a metal oxide but the weak acid does not

II. The weak acid is less disassociated than the strong acid

III. The strong acid has a greater conductivity that the weak acid.

Answers

Answer:

 

Explanation:

i need help asap plzz i will give 100 points

Answers

Answer:

u can g00gle it , just copy nd paste its all there. hope this helps

Explanation:

Trial 3 is the answer

Why nitration of benzene is easier than that of benzene......... And how is phenol converted to TNT

Answers

Answer:

The nitration of phenol is easier than that of benzene because benzene has delocalised pie-electrons which makes it more stable than phenol.

Phenol is converted to Trinitrotoluene by adding zinc dust to remove the hydroxyl group, then reacted with Aluminium oxide followed by haloalkane.

9. Which of the following is a nucleotide found in DNA?
1
O
deoxyribose sugar, phosphate, nitrogenous base
ribose sugar, amino acid, nitrogenous base
ribose sugar, phosphate, nitrogenous base
deoxyribose sugar, amino acid, nitrogenous base

Answers

The first one. So A

Match the following quantities


-
6.02 x 1023 atoms of Al


-
1 molecule of N2O


-
6.02 x 1023 molecules of C2H4


-
1 atom of Au

A.
28.05 g

B.
26.98 g

C.
44.01 u

D.
196.97 u

Answers

Answer:

C.44.01 u

Explanation:

basta ayan yong answer ko

Number of molecules in 16 grams of h2co3

Answers

1 mole =6.023×10 root 23. 16 x 10root 23=160root 23 mole.

For this one u can work out the amount of moles in h2co3 by using moles=mass/mr(of h2co3 is 52)

so 16/62=0.258moles then u use the equation

number of particle = moles × 6.02×10^23

=0.258×6.02 ×10^23

=1.55×10^23 molecules.

hope this helps

_______ are events that disrupt the stability of a whole ecosystem.

A.Resources
B.Disturbances
C.Species

Answers

B. Disturbances are events that disrupt the stability of a whole ecosystem

Based on your understanding of how bond types influence a material’s properties, identify each of the following compounds as being made of ionic, covalent, or metallic bonds.
ANSWER
Steel: Metalic
Propane: Covalent
Calcium chloride: ionic
Water: Covalent
Edge 2021

Answers

Answer: The given compounds are identified as being made of ionic, covalent, or metallic bonds:

Steel - Metallic bondsPropane - Covalent bondsCalcium chloride - Ionic bondsWater - Covalent bonds

Explanation:

A bond formed by transfer of electrons from one atom to another is called an ionic bond. An ionic bond is formed between a metal atom and a non-metal atom.

A bond formed by transfer of electrons from one atom to another is called a covalent bond. A covalent bond is formed between two or more non-metal atoms only.

Steel is actually an alloy of carbon and iron where there is less than 2% carbon, 1% manganese and small amounts of silicon, phosphorus, oxygen and sulphur are present.

When atoms of metals are held together then bond formed between these atoms is called metallic bond.

Hence, steel is made of metallic bond.

Chemical formula of propane is [tex]CH_{3}CH_{2}CH_{3}[/tex] as there are only non-metal atoms are present. So, sharing of electrons takes place in such atoms due to which covalent bonding will be there.

Hence, propane is made up of covalent bonds.  

Calcium chloride contains a metal and a non-metal atom. This means that electrons are being transferred from calcium atom to the chlorine atom. Hence, bond present in calcium chloride is ionic bond.

Water has chemical formula [tex]H_{2}O[/tex]. Since, non-metal atoms are present there so sharing of electrons takes place between hydrogen and oxygen atoms. Hence, covalent bond is present in water.

Thus, we can conclude that given compounds are identified as being made of ionic, covalent, or metallic bonds:

Steel - Metallic bondsPropane - Covalent bondsCalcium chloride - Ionic bondsWater - Covalent bonds

Steel: ✔ metallic

Propane: ✔ covalent

Calcium chloride: ✔ ionic

Water: ✔ covalent

What chemical reaction happens when water breaks down into hydrogen and oxygen

Answers

Answer:

bldg licking no-good also

Answer:

Water splitting is the chemical reaction in which water is broken down into oxygen and hydrogen: 2 H2O → 2 H2 + O. Efficient and economical water splitting would be a technological breakthrough that could underpin a hydrogen economy, based on green hydrogen.

In which classification of matter are the components chemically combined?
A metal
B compound
C mixture
D Metalloids

Answers

The answer is B. Compound

Why would the electrolysis reaction stop if the battery was removed

Answers

If the battery was removed, the energy produced by the battery would not be able to continue its path along the circuit.

PLEASE HELP WILL GIVE LOTS OF POINTS!!!!!!!!!!!! What is the daughter particle if Uranium -234 undergoes beta decay? Write your answer in isotopic notation.

Answers

Answer:

Given nuclide is uranium-234.

If it undergoes beta decay then, what will be the daughter particle?

Explanation:

The beta particle decay increases the atomic number of the nuclide by one.

There is no change in the mass number of the nuclide.

The decay of beta particle from Uranium-234 is shown below:

It forms Np-93.

Please help!!!!!!!!!!!!!!!!!!!

Answers

Answer:

Hydrochloric acid + calcium hydroxide = calcium chloride + water

. If you have 5.42 x 1024 aluminum atoms, approximately how many moles is that?


Please help me

Answers

Answer:

5.42x10^24 atoms/1 x 1 mole/6.022x10^23

= 9.5 mol

Evaluate the method of separation to be used.
1. Stones and rice (for cooking)​

Answers

Answer:

hand picking

Explanation:

as stone is bigger in size we can see them with our eyes so we can handpick it

Answer:

The method of hand picking is used to separate undesirable substances such as small pieces of stones from wheat, rice and pulses. The food grains containing small pieces of stones are taken in a flat container. The pieces of stones are picked up from the grains by hands, one by one, and thrown away.23 Oct 2020

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