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3 years ago

At 20 degrees celsius, how much sodium chloride could be dissolved in 2L of water

1 answer:

8 0

The source below says 35.89g of NaCl dissolve in 100 g of water at 20 °C.

(35.89g / 100 mL) x (2000 mL) = 718 g

Hope this helped

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The form of heat transfer taking place in the crust of the earth would be ____

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The form of heat transfer taking place in the crust of the Earth would be Convection.

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2 years ago

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Which of the following represents the least number of molecues?

Mars2501 [29]

Answer:

Answer: a) 20g of H2O (18.02 g/mol) molecules=6.68x10^23

Explanation:

In order to find the amount of molecules of each of the options, we need to follow the following equation.

$molecules=\frac{mass(g)x6.022x10^{23}(molecules/mol) }{atomic weight(g/mol)}$

So, let´s get the number of molecules for each of the options.

$a) molecules=\frac{20(g)x6.022x10^{23}(molecules/mol) }{18.02(g/mol)}=6.68x10^{23}molecules$

$b) molecules=\frac{77(g)x6.022x10^{23}(molecules/mol) }{16.06(g/mol)}=2.89x10^{24}molecules$

$c) molecules=\frac{68(g)x6.022x10^{23}(molecules/mol) }{42.09(g/mol)}=9.73x10^{23}molecules$

$d) molecules=\frac{100(g)x6.022x10^{23}(molecules/mol) }{44.02(g/mol)}=1.37x10^{24}molecules$

$d) molecules=\frac{84(g)x6.022x10^{23}(molecules/mol) }{20.01(g/mol)}=2.53x10^{24}molecules$

the smalest number is in option a)

Best of luck.

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2 years ago

Can a bad thermostat cause radiator to blow

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I don't exactly know but probably so.

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3 years ago

C como Se define una cuenca hidrogatica Ayudaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

sladkih [1.3K]

Answer:

Una cuenca es un área de tierra que drena todos los arroyos y la lluvia a una salida común, como la salida de un embalse, la boca de una bahía o cualquier punto a lo largo del canal de un arroyo.

Explanation:

Espero que esto ayude a marcar el MÁS CEREBRAL !!!

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3 years ago

Aluminium and potassium nitrate will not react when mixed together?

Stels [109]

Answer:

they would react to make aluminum oxide and nitrogen

Explanation:

hope this helps plz mark as brainliest

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2 years ago

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