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IgorLugansk [536]

3 years ago

7

During an ionic bond, electrons are basically transferred from one atom to another whereas in a covalent bond, electron pairs ar

e shared. true or false

1 answer:

Ad libitum [116K]3 years ago

8 0

The answer is true......

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disolvemos 25 g de hidroxido de sodio en agua hasta obtener 500 cm3 de disolucion. ¿Cual es la concentracion molar de la disoluc

LiRa [457]

Answer:

$M=1.25M$

Explanation:

Hola,

Dado que la molaridad de una solución es definida en términos de las moles de soluto y el volumen de la solución en litros:

$M=\frac{n}{V}$

Primero debemos calcular las moles de hidróxido de sodio, teniendo en cuenta que su masa molar es de 40 g/mol:

$n=25gNaOH*\frac{1molNaOH}{40gNaOH}=0.625mol$

Luego, el volumen el litros:

$V=500cm^3*\frac{1L}{1000cm^3} =0.500L$

Así, calculamos la concentración molar de la solución:

$M=\frac{0.625mol}{0.500L}\\ \\M=1.25M$

Saludos!

3 0

3 years ago

Read 2 more answers

Perform the following mathematical operations and express the correct answer to the proper number of significant figures or deci

nordsb [41]

Answer: 7.71 + 4.31 + 1.7 + 4.00141= 17.72141

7.71 x 4.31 x 1.7 x 4.00141= 226.04433255

Explanation:

(i) 7.71 + 4.31 + 1.7 + 4.00141

= 7.71000+4.31000+1.70000+ 4.00141 [make like decimals]

= 17.72141 [By adding the corresponding places ]

(ii) 7.71 x 4.31 x 1.7 x 4.00141 =( 7.71 x 4.31) x 1.7 x 4.00141

= 33.2301 x 1.7 x 4.00141

= (33.2301 x 1.7) x 4.00141

= 56.49117 x 4.00141

= ( 56.49117 x 4.00141 )

= 226.04433255

Hence, 7.71 + 4.31 + 1.7 + 4.00141= 17.72141

7.71 x 4.31 x 1.7 x 4.00141= 226.04433255

7 0

3 years ago

What is the suns color

WINSTONCH [101]

The suns color is orange and yellow

3 0

3 years ago

Read 2 more answers

Write a goal of the lab or the question you tried to answer

Free_Kalibri [48]

Answer:

I need to see the lab

Explanation:

7 0

3 years ago

Positive Deviation from Raoult's Law occurs when the vapour pressure of component is greater than what is expected in Raoult's L

8090 [49]

Answer:

All of the above.

Explanation:

In positive deviation from Raoult's Law occur when the vapour pressure of components is greater than what is expected value in Raoult's law.

When a solution is non ideal then it shows positive or negative deviation.

Let two solutions A and B to form non- ideal solutions.let the vapour pressure of component A is $P_A$ and vapour pressure of component B is $P_B$ .

$P^0_A$ = Vapour pressure of component A in pure form

$P^0_B$ = Vapour pressure of component B in pure form

$x_A$ =Mole fraction of component A

$x_B=$ =Mole fraction of component B

The interaction between A- B is less than the interaction A- A and B-B interaction.Therefore, the escaping tendency of liquid molecules in mixture is greater than the escaping tendency in pure form.Hence, the vapour pressure of a mixture is greater than the initial value of vapour pressure.

$P_A >P^0_A\cdot x_A$ , $P_B>P^0_B\cdot x_B$

Therefore, $P_A+P_B >P^0_A\cdot x_A+P^0_B \cdot x_B$

Therefore, the enthalpy of mixing is greater than zero and change in volume is greater than zero.

Hence, option a,b,c and d are true.

6 0

3 years ago