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2 years ago

Which best explains the relationship between evaporation and temperature?

Chemistry

1 answer:

RideAnS [48]2 years ago

5 0

Answer:

A liquid evaporated slow at higher temperature bz the vapour pressure of the is higher so few molecule can escape the surface

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The label on a pressurized can of spray disinfectant warns against heating the can above 130 degree fahrenheit . What are the co

Leviafan [203]

Answer : The temperature in degree Celsius and Kelvin is, $54.44^oC\text{ and }327.59K$ respectively.

Explanation :

The conversion used for the temperature from Fahrenheit to degree Celsius is:

$^oC=(^oF-32)\times \frac{5}{9}$

where,

$^oF$ = temperature in Fahrenheit

$^oC$ = temperature in centigrade

The conversion used for the temperature from degree Celsius to Kelvin is:

$K=273.15+^oC$

where,

$K$ = temperature in Kelvin

$^oC$ = temperature in centigrade

As we are given the temperature in Fahrenheit is, 130

Now we have to determine the temperature in degree Celsius.

$^oC=(^oF-32)\times \frac{5}{9}$

$^oC=(130^oF-32)\times \frac{5}{9}$

$^oC=54.44$

Now we have to determine the temperature in Kelvin.

$K=273.15+^oC$

$K=273.15+(54.44^oC)$

$K=327.59$

Therefore, the temperature in degree Celsius and Kelvin are, $54.44^oC\text{ and }327.59K$

3 0

3 years ago

The total number of electrons _______ must equal the total number of electrons ____________.

larisa [96]

Answer:

(not sure if this helps but)

The number of electrons in a neutral atom is equal to its proton.

Explanation:

The number of protons in a neutral atom are equal to its number of protons. It is also equal to its atomic number.

hope it helps :)

7 0

3 years ago

En la electrólisis del Cloruro de plomo se han depositado 2.6 gramos del metal en 20 minutos el peso atómico del plomo es 206 ca

mart [117]

Answer:

2.01 A

Explanation:

Para esta pregunta debemos empezar por la semi-reaccion del plomo:

$Pb^+^2~_(_a_q_)~+~2e^-~->~Pb_(_s_)$

Se intercambian dos electrones en la semi-reacción del plomo. Si tenemos en cuenta la ecuación:

$n=\frac{I*t}{z*F}$

Donde:

n= Moles depositados 

I= Intensidad de corriente (en Amperios)

z= Numero de electrones intercambiados

F= Constante de faraday = 96484 C/mol

t=tiempo (en segundos)

Que conocemos de esta ecuación?

Los moles (se pueden calcular a partir de la masa atómica del plomo, 207.2 g/mol)

$2.6~g~Pb\frac{1~mol~Pb}{207.2~g~Pb}=0.0125~mol~Pb$

El tiempo (hay que convertirlo a segundos):

$20~min\frac{60~s}{1~min}=1200~s$

Z (Numero de electrones)

De acuerdo a la semi-reacción son intercambiados 2 electrones.

Por lo tanto podemos resolver para "I":

$I=\frac{n*z*F}{t}=\frac{0.0125~mol*2*96484\frac{C}{mol}}{1200~s}$

$I~=~2.01~\frac{C}{s}=2.01~A$

Espero que sea de ayuda!

6 0

3 years ago

If 7.50 g of NaClO3 decomposes in the presence of heat to produce 4.12 g

USPshnik [31]

Answer:

3.38 grams of O2 will be produced

Explanation:

Step 1: Data given

Mass of NaClO3 = 7.50 grams

Mass of NaCl = 4.12 grams

Molar mass of NaClO3 = 106.44 g/mol

Molar mass of NaCl = 58.44 g/mol

Step 2: The balanced equation

2NaClO3(s) → 2NaCl(s) + 3O2(g)

Step 3: Calculate moles

Moles NaClO3 = mass NaClO3 / molar mass NaClO3

Moles NaClO3 = 7.50 grams / 106.44 g/mol

Moles NaClO3 = 0.0705 moles

Moles NaCl = 4.12 grams / 58.44 g/mol

Moles NaCl = 0.0705 moles

For 2 moles NaClO3 we'll have 2 moles NaCl and 3 moles O2

For 0.0705 moles NaClO3 we'll have 0.0705 moles NaCl and 3/2 * 0.0705 = 0.10575 moles O2

Step 4: Calculate mass O2

Mass O2 = moles O2 * molar mass O2

Mass O2 = 0.10575 moles * 32.0 g/mol

Mass O2 = 3.38 grams O2

3.38 grams of O2 will be produced

6 0

3 years ago

Which of the following is a balanced chemical equation for the synthesis of NaBr from Na and Br2? A. 2Na + Br2 --> 2NaBr B. N

max2010maxim [7]

A. 2Na + Br2-->2NaBr.

6 0

4 years ago

Read 2 more answers