Supply the volume of insoluble substance from the displaced liquid Displaced liquid: 274 ml

Volume: ? L

Answers

Answer 1

Answer: 1 L ----------- 1000 mL
? ------------- 274 mL

L = 274 * 1 / 1000

= 0.274 L

hope this helps!

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Don’t understand this science Question.

Answers

What is the question?

Answer:

I got you..you need help but with which question?

Explanation:

Have a great day!

Which of these reactions can be classified as double replacement reactions?A) Zn + 2HCl → ZnCl2 + H2

B) 2NaCl + F2 → 2NaF + Cl2

C) 2AlBr3 + 3K2SO4 → 6KBr + Al2(SO4)3

D) 2K + MgBr2 → 2KBr + Mg

Answers

C is the answer. Reasons being that, two elements from both side of the reactant switches side to form two new compounds. On the other hand, A , B and D involves one element displacing the other to produce a new compound.

Answer:

The correct answer is option C.

Explanation:

Double displacement reaction is defined as the reaction in which exchange of ions takes place to give a product.

$AB+CD\rightarrow CB+AD$

Single displacement reaction is defined as the reaction in which more reactive element displaces a less reactive element from its chemical reaction.

$AB+C\rightarrow CB+A$

From all the given options the reaction which is classified as Double displacement reaction is :

$2AlBr_3 + 3K_2SO_4\rightarrow 6KBr + Al_2(SO_4)_3$

Where as other reactions are the examples of Single displacement reaction.

In a redox reaction, why does an element’s oxidation number decrease?

Answers

Element’s oxidation number decrease that because that element has received electrons from another element

Explanation:

a reduction in oxidation state is known as a reduction. Such reactions include the formal removal of electrons: a net gain in electrons moving a reduction, and a clear loss of electrons being an oxidation.

An oxidation-reduction (redox) reaction is a type of synthetic reaction that involves a transfer of particles between two species. An oxidation-reduction reaction is any synthetic reaction in which the oxidation number of a molecule, atom, or ion quarters by winning or missing an electron.

that because that element has received electrons from another element

hope that helps

Which is a unique feature of Jupiter? A.
the least dense planet in the solar system

B.
the largest, most massive planet

C.
rotates on an axis tilted entirely sideways

D.
the most distant planet from the sun

Answers

I would say the answer is A, because Jupiter is the least dense planet in the solar system. It is the largest planet in our solar system, but that is not what answer choice says. Jupiter does not rotate on an axis completely sideways, that is Uranus, and is not the most distant planet from the sun.

The reduced vapor pressure at high altitudes causes a liquid to boil at a temperature.A. Lower
B. Higher

Answers

Answer:

Lower Temperature

Explanation:

The boiling point is defined as the temperature at which the vapor pressure of a given liquid becomes equal to the external pressure or atmospheric pressure. Boiling point is mainly effected by following factors:

1) Inter-Molecular Interactions:

Greater the intermolecular interactions greater will be the boiling point because more energy is required to overcome these intermolecular interactions.

Example:

Water = 100 °C

Diethyl ether = 34.5 °C

Water requires more energy because it contains hydrogen bond interactions which are considered the strongest intermolecular interactions. While, Diethyl ether lacks Hydrogen bondings.

2) External Pressure:

The boiling point also varies with changing the external pressure for the same solvent. Greater the external pressure greater will be the boiling points and vice versa.

Example:

Water:

External Pressure Boiling Point

1 atm 100 °C

0.921 atm 98 °C

0.425 atm 72 °C

At higher altitudes (and thus lower atmospheric pressures), water boils at a lower temperature. This is because the lack of vapor pressure at that altitude doesn't constrain the speed of the molecules with barometric pressure. Therefore, the water begins boiling at a lower temperature. This is often a disadvantage because even if the water is boiling, it won't be hot enough for meals (which is why heat and temperature are distinct). That's why we have pressure cookers, which manage to keep a stable boiling point.
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Who discovered the electron?