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LenaWriter [7]
3 years ago
14

If I bought a pen, would this be an irreversible change? Explain why

Chemistry
2 answers:
Ksju [112]3 years ago
5 0

Answer:

No

this is reversible because you can return the pen.

tia_tia [17]3 years ago
4 0

Answer:

No

Explanation:

it will not be a irreversible change because u can give back the pen if it is in its original state and the shop keeper might accept it back that is what mostly happens. if the pen breaks or is used then it might me called a irreversible change until then it is reversible if not used yet.

thank u

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In general, ethers have a much lower boiling point than their isomeric alcohols. why? the carbon-oxygen bond in ethers is nonpol
lana66690 [7]
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7 0
4 years ago
A student takes a measured volume of 3.00 M HCl to prepare a 50.0 mL sample of 1.80 M HCL. What volume of 3.00 M HCI
netineya [11]

To solve the question you use the following formula:

concentration (1) × volume (1) = concentration (1) × volume (1)

3 M ×  volume (1)  = 1.8 M × 50 mL

volume (1)  = (1.8 M × 50 mL) / 3 M = 30 mL

8 0
4 years ago
Read 2 more answers
Solid Al(NO3)3 is added to distilled water to produce a solution in which the concentration on nitrate, [NO3^-], is 0.10 M. What
VikaD [51]

Answer:

The concentration of nitrate ion NO_{3}^{-}  is 0.033 M.

Explanation:

Al(NO_{3})_{3} \rightarrow Al^{3+} + NO_{3}^{-}

1 mole of [Al^{3+}]  = 3 mole NO_{3}^{-}

Let  [NO_{3}^{-}]  = 3y

then according to above reaction,

[Al^{3+}] = y

[NO_{3}^{-}] = 0.10 M (given)

[Al^{3+}] = ?

3y = 0.10 M

y = \frac{0.1}{3}

y = 0.033 M

So ,concentration of [Al^{3+}] = y = 0.033 M

5 0
3 years ago
A sample of nitrogen gas with a volume of 180 cm at a temperature of
maksim [4K]

Answer:

The final pressure of gas is 82.64 KNm⁻²

Explanation:

Given data:

Initial volume of gas = 180 cm³

Temperature of gas = 27°C

Initial pressure = 101 KNm⁻²

Final volume = 220 cm³

Final pressure = ?

Solution:

The given problem will be solved through the Boly's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

101 KNm⁻² × 180 cm³ = P₂ × 220 cm³

P₂ = 18180 KNm⁻². cm³/220 cm³

P₂ = 82.64 KNm⁻²

The final pressure of gas is 82.64 KNm⁻².

4 0
3 years ago
How many moles are there in 44.71 g of chlorine (cl)? use significant figures?
krok68 [10]

Mass of chlorine  = 44.71 g (given)

Molar mass of chlorine  =35.45 g/mol

Now, number of moles is defined as the ratio of given mass in gram to the molar mass of the compound.

Number of moles  = \frac{given mass in g}{molar mass}

Number of moles of chlorine  =\frac{44.71 g}{35.45 g/mol}

= 1.26121297 moles

Now, according to significant figure rules, the least number of significant figure in the question identifies the number of significant figures in the solution.

Thus, in question, both digit have four significant figures, therefore, the answer must be in four significant figures.

Hence, number of moles of chlorine = 1.261 moles

7 0
4 years ago
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