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3 years ago

•What do you think salt water is useful for?

Chemistry

1 answer:

Ivanshal [37]3 years ago

6 0

Answer:

it is good for thermoelectric power plant cooling

it means that there is a lot of salt in the water

Someone would remove salt from water to be able to drink it

lastly, salt can be removed from water with reverse osmosis systems

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The balance of the following equations

myrzilka [38]

A. 6 NaOH + 2(NH4)3 PO4 -----> 2Na PO4 + 6H2O + 6NH3

b. C2 H6 O + 3O2 ----> 2CO2 + 3H2O

5 0

3 years ago

Use the Henderson-Hasselbalch equation, eq. (3), to calculate the pH expected for a buffer solution prepared from this acid and

notka56 [123]

Answer:

$pH=4.56$

Explanation:

Hello there!

In this case, given the Henderson-Hasselbach equation, it is possible for us to compute the pH by firstly computing the concentration of the acid and the conjugate base; for this purpose we assume that the volume of the total solution is 0.025 L and the molar mass of the sodium base is 234 - 1 + 23 = 256 g/mol as one H is replaced by the Na:

$n_{acid}=\frac{0.2g}{234g/mol}=0.000855mol\\\\n_{base}= \frac{0.2g}{256g/mol}=0.000781mol$

And the concentrations are:

$[acid]=0.000855mol/0.025L=0.0342M$

$[base]=0.000781mol/0.025L=0.0312M$

Then, considering that the Ka of this acid is 2.5x10⁻⁵, we obtain for the pH:

$pH=-log(2.5x10^{-5})+log(\frac{0.0312M}{0.0342M} )\\\\pH=4.60-0.04\\\\pH=4.56$

Best regards!

6 0

2 years ago

Which of the following is the smallest volume? 500 mL 2,500 cm3 5.5 x 10-1 L 25 m3

Anni [7]

500 ml is the answer

6 0

3 years ago

What is the mass in grams of 1.204x10^24 molecules of hydrogen gas (H2) ?

Katen [24]

Answer:

68 g/mol. 34 g/mol.

Explanation:

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3 years ago

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A(n)<br> wave carries energy through matter.

denis23 [38]

Answer:

A wave is a disturbance that carries energy from one place to another through matter and space. When we through a stone or a pebble in calm water, then the particles of water moves up and down and this process continues for some time. This implies that there is a disturbance produced in water.

Explanation:

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3 years ago