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DIA [1.3K]
3 years ago
13

..................................

Chemistry
1 answer:
NeX [460]3 years ago
3 0

Answer:

??????????????

Explanation:

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What does the δ– symbol mean on a water diagram?
Law Incorporation [45]

Answer:

a or

Explanation:

im guessing that it has to involve something with a negative

4 0
3 years ago
Read 2 more answers
Calculate the number of moles of sodium carbonate originally present, if 6.0 ml of 0.100 M HCl were used to titrate the mixture
valina [46]

Answer:

0.0006 mole

Explanation:

Considering:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Or,

Moles =Molarity \times {Volume\ of\ the\ solution}

Given :

For HCl :

Molarity = 0.100 M

Volume = 6.0 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 6.0×10⁻³ L

Thus, moles of potassium iodide :

Moles=0.100 \times {6.0\times 10^{-3}}\ moles

Moles of HCl = 0.0006 moles

From the reaction shown below:-

HCl+Na_2CO_3\rightarrow NaHCO_3+NaCl

1 mole of HCl reacts with 1 mole of sodium carbonate.

So,

0.0006 mole of HCl reacts with 0.0006 mole of sodium carbonate.

<u>Moles of sodium carbonate = 0.0006 moles</u>

5 0
3 years ago
As the force increases, the ________ increases, too.
madreJ [45]

Answer:

Pressure?

Explanation:

...........

8 0
3 years ago
calculate the concentration in parts per million (ppm) of DDT if a sample size of 2000 g contained 0.050 g DDT
Firlakuza [10]

Answer:

= 25 ppm

Explanation:

  • PPM also refers to parts per million, it represents a low concentration of a solution. It represents 0.001 gram or a milligram in a 1000 mL, which equivalent to 1 mg per liter.

Given; a sample size of 2000 g contained 0.050 g DDT

It means, 2000 mL sample contained 50 mg DDT

Therefore in ppm we get;

= 50 mg/ 2 L

= 25 mg/L

<u>= 25 ppm</u>

4 0
3 years ago
Calcular el valor de la presión osmótica que corresponde a una solución que contiene 2 moles de soluto en un litro de solución a
Brums [2.3K]

El valor de la presión osmótica que corresponde a una solución que contiene 2 moles de soluto en un litro de solución a una temperatura de 17°C es 47.56 atmósferas.

La presión osmótica se puede calcular usando la siguiente ecuación:

\pi = \frac{nRT}{V}   (1)

En donde:

n: es el número de moles = 2 moles

R: es la constante de los gases = 0.082 L*atm/(K*mol)

T: es la temperatura = 17 °C = 290 K

V: es el volumen = 1 L

Introduciendo lo valores anteriores en la ecuación (1), tenemos:

\pi = \frac{nRT}{V} = \frac{2 moles*0.082 L*atm/(K*mol)*290 K}{1 L} = 47.56 atm

Por lo tanto, la presión osmótica es 47.56 atmósferas.

Puedes encontrar más aca:

  • brainly.com/question/5041899?referrer=searchResults
  • brainly.com/question/5925156?referrer=searchResults

Espero que te sea de utilidad!

5 0
3 years ago
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