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4 years ago

What is a system called when neither energy nor matter is exchanged between the system and the surroundings?

Chemistry

1 answer:

Evgesh-ka [11]4 years ago

4 0

Answer:

Isolated system

Explanation:

If we are talking about theremodynamic system answer is ISOLATED SYSTEM

If we talking about mechanic annswer is CLOSED SYSTEM

CLOSED SYSTEM IN CLASSICAL MECHANICS = ISOLATED SYSTEM IN THERMODYNAMICS.

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How many grams of naoh are needed to prepare 500 ml of 0.125 m naoh?

Romashka-Z-Leto [24]

First let us calculate for the number of moles needed:

moles NaOH = 0.125 M * 0.500 L = 0.0625 mol

The molar mass of NaOH is 40 g/mol, hence the mass is:

mass NaOH = 0.0625 mol * 40 g/mol

mass NaOH = 2.5 grams

6 0

3 years ago

Given a chemical equation, showing the dissociation of an acid in solution, be able to identify the "acid", the "base", the "con

Karo-lina-s [1.5K]

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory:

An acid is defined as a substance which looses donates protons and thus forming conjugate base
A base is defined as a substance which accepts protons and thus forming conjugate acid.

$HA+H_2O\rightarrow A^-+H_3O^+$

Suppose acid Ha is getting dissociated in its solution and after dissociation it donates its proton to water molecule and forms conjugate base. Where as water (acting as a base) accepts protons and forms conjugate acid.

HA = Acid

$H_2O$ = Base

$A^-$ = Conjugate base

$H_3O^+$ = Conjugate acid

For example:

$H_2SO_4+2H_2O\rightarrow SO_4^{2-}+2H_3O^+$

Sulfuric acid dissociating in its solution to form conjugate base and conjugate acid.

Sulfuric acid = Acid

$H_2O$ = Base

$SO_^{2-}$ = Conjugate base

$H_3O^+$ = Conjugate acid

3 0

4 years ago

0. 34 ll of hno3hno3 is titrated to equivalence using 0. 14 ll of 0. 1 mnaohmnaoh. what is the concentration of the hno3hno3 ?

Sphinxa [80]

When 0.34 of HNO₃ is titrated to equivalence using 0.14 l of 0.1 m NaOH then the concentration of HNO₃ is 0.041 M

The reaction of neutralization of HNO₃ with NaOH is

HNO₃ + NaOH → H₂O + NaNo₃

When 1 mole of HNO₃ react with 1 mole of NaOH, based on chemical rection the moles of NaOH at equivalence point are equal to moles of HNO₃ present in solution: -

With the mole and volumes, we can find molarity as follows:

Moles of NaOH = moles HNO₃

⁼ 0.14 L X (0.1 mol NaOH/L) = 0.014 mole NaOH

=0.014 mol HNO₃

Molarity: -

$\frac{(Mole of HNO₃)}{(volume of HNO₃)}= \frac{0.014}{0.34}$

= 0.041 M

Thus, from above solution we concluded that the concentration of HNO₃ solution is 0.041 M.

Learn more about molarity: brainly.com/question/8732513

#SPJ4

6 0

2 years ago

How does a balanced chemical equation demonstrate the Law of Conservation of Mass?

Gelneren [198K]

Answer:

it shows that no atom have been gained or loosed in that reaction

3 0

3 years ago

Which chemical property deals with the ability of a substance being able to

Fantom [35]

$\large\underline{\bf\red{Solution:-}}$

The chemical property deals with the ability of a substance being able to burn is called combustibility [ option b ] .

More to know :-

1) Combustion :-

Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives out heat.

The fuel can be any one of the 3 states of matter that is - solid , liquid & gases .

Examples of combustible substances :-

Solid - Coal

Liquid - Petrol , Disel , etc.

Gas - Hydrogen , Oxygen , etc .

5 0

3 years ago

Read 2 more answers