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Elanso [62]
4 years ago
7

Which of this is the method by which fire extinguisher works?

Chemistry
2 answers:
Andrew [12]4 years ago
8 0

Answer:

the answer is a.cut off the supply of oxygen

katen-ka-za [31]4 years ago
6 0

Answer:

Option D

Explanation:

There are 5 main fire extinguisher types – Water, Foam, Dry Powder, CO2 and Wet Chemical. Hence the different chemicals released will react with oxygen in the air to prevent the fire from getting sufficient oxygen and spreading.

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For the reaction ag2s(s) ⇌ 2 ag+ (aq) + s2- (aq), keq = 2.4 × 10-4 and the equilibrium concentration of silver ion is [ag+] = 2.
Juliette [100K]

Answer : The concentration of silver ion is, 3.8\times 10^{-3}M

Explanation :

Equilibrium constant : It is defined as the equilibrium constant. It is defined as the ratio of concentration of products to the concentration of reactants.

The equilibrium expression for the reaction is determined by multiplying the concentrations of products and divided by the concentrations of the reactants and each concentration is raised to the power that is equal to the coefficient in the balanced reaction.

As we know that the concentrations of pure solids and liquids are constant that is they do not change. Thus, they are not included in the equilibrium expression.

The given equilibrium reaction is,

Ag_2S(s)\rightleftharpoons 2Ag^+(aq)+S^{2-}(aq)

The expression of K will be,

K_{eq}=[Ag^+]^2[S^{2-}]

2.4\times 10^{-4}=(2.5\times 110^{-1})^2[S^{2-}]

[S^{2-}]=3.8\times 10^{-3}M

Therefore, the concentration of silver ion is, 3.8\times 10^{-3}M

4 0
3 years ago
Read 2 more answers
Stiff outer layer that supports and protects the plant cell
pshichka [43]
Cell Membrane
The cell membrane also protects and supports the cell. Found in plant cells but not animal cells. This is the outer most layer in the plant cell. It is stiff, rigid and non living, and mad of cellulose.
6 0
4 years ago
Calculate the number of carbon atoms in 25.0 grams of isopropyl alcohol (c3h8o)
allochka39001 [22]
First, let's determine the number of moles of carbon atoms by using molar mass. Then, using Avogadro's number, we can find the number of C atoms:
*1 mole of C3H8O= (12.0x3)+(1.0x8)+(16.0x1) = 60.0g/mol

25.0 grams C3H8O x (1 mole C3H8O/60.0 grams) = 0.417 mol

0.417mol C3H8O has (3 x 0.417 moles) C atoms = 1.251 moles C atoms

1.251 moles C atoms x(6.022x10^23 atoms/mol) = 9.42x10^23 C atoms.

The answer is in 3 significant figures, as that's what we have in the given, and we matched it with our rounding of the atomic masses from the periodic table.
You can do this all in one equation written left to right, just exclude the intermediate answers. Just easier to show it this way on the computer screen.



7 0
4 years ago
Read 2 more answers
Which image represents a homogeneous mixture?
Pani-rosa [81]
Imagine A is a Heterogeneous mixture because it a mixture composition that does not stay the same throughout the mixture.
Imagine B is the Homogeneous mixture because it has no changes or irregularities
4 0
3 years ago
What mass of caco3 (in grams) is needed to make 10.5 l of a 1.50 m caco3 solution?
kiruha [24]
Data:

M = 1.50 (assiming the data is Molarity and not molality, which is written with capital letter)

V= 10.5 l

n = ?

Formulas:

M = n / V => n = M * V

n = mass in grams / molar mass => mass in grams = n * molar mass

Solution

n = 1.50 * 10. 5 l = 15.75 moles

molar mass CaCO3 = 40.08 g/mol + 12.01 g/mol + 3* 16 g/mol = 100.09 g/mol

mass in grams = 15.75 moles * 100.09 g/mol = 1,576.4 g.

Answer: 1,576 g
4 0
3 years ago
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