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zmey [24]
3 years ago
11

Why can characteristics properties be used to identify unknown substances

Chemistry
1 answer:
frozen [14]3 years ago
5 0

Characteristic properties are used because the sample size and the shape of the substance does not matter.

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2 A certain gas of 25 g at 25°c and 0.65 atm occupies a volume of 23.52L Determine the molecule mass of the gas.​
denpristay [2]

Answer:

{ \bf{PV= \frac{m}{M} RT}} \\  \\ { \tt{(0.65  \times 23.52)  =  \frac{25}{M}  \times 0.081 \times (25 + 273)}} \\  \\ M = 39.5 \: g

8 0
3 years ago
A white crystalline salt conducts electricity when it is melted and when it dissolves in water.
sergeinik [125]

Answer: Option (a) is the correct answer.

Explanation:

Ionic salts are defined as the salts which tend to contain ionic bonds as there occurs transfer of electrons between its combining atoms.

So, when an ionic salt melts or it is dissolved in water then it will dissociate into its respective ions and as electricity is the flow of electrons or ions. Hence, this salt is then able to conduct electricity.

As covalent compounds are insoluble in water so, they do no dissociate into ions. Hence, they do not conduct electricity.

Similarly, metallic and network solids do not dissociate into ions either when melted or dissolved in water. Therefore, they also do not conduct electricity.

Thus, we can conclude that when a white crystalline salt conducts electricity when it is melted and when it dissolves in water then this bond is of ionic type.

7 0
3 years ago
When there is a shifting of party allegiances within the electorate, it is called?
IgorLugansk [536]

Party realignment a shifting of party alliances within the electorate.

<h3 /><h3>What is party alliances?</h3>

An electoral alliance is a grouping of political parties or individuals who get together primarily to run for office in elections. It is also referred to as a bipartisan electoral accord, electoral pact, electoral agreement, electoral coalition, or electoral bloc.

Founded in 2019, the Alliance Party is a centrist American political party. It is connected to the American Party of South Carolina, the Minnesota Independence Party, the Connecticut Independent Party, and the Florida Reform Party.

to learn more about party alliances go to -

brainly.com/question/12448825

#SPJ4

8 0
2 years ago
How many moles of KNO3 are in 500 mL of 2.0 M KNO3?<br> ___ mol KNO3
weeeeeb [17]

Answer: 1mole

Explanation:

Mole = concentration× Volume (dm3)

Mole = 2× 500/1000

4 0
3 years ago
Read 2 more answers
Please help!!! Stoich Question
Greeley [361]

Answer:

4KO₂ + 2CO₂ -> 2K₂CO₃ + 3O₂

<u> Step 1: Find the moles of O₂.</u>

n(O₂) = mass/ Mr.

n(O₂) = 100 / 32 = 3.125 mol

<u>Step 2: Find the ratio between KO₂ and O₂.</u>

        <u>KO₂ </u>    :      <u> O₂</u>

          4        :       3

        4/3       :       1

  (4*3125)/3  :      3.125

=4.167 mol of KO₂

Thus now we know, to produce 100 g of O₂, we need 4.167mol of KO₂

<u>Step 3: Find the mass of KO₂:</u>

<u />

mass = mol * Mr. (KO₂)

Mass = 4.167* 71.1

Mass = 296.25 g

5 0
2 years ago
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