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3 years ago

What's a closed system?Explain

Chemistry

2 answers:

LiRa [457]3 years ago

7 0

Answer:

A physical system

Explanation:

It doesn't allow certain types of transfers, though the transfer of energy is permitted.

NikAS [45]3 years ago

7 0

Physical system that doesn’t allow certain types of transfers, though the transfer of energy is allowed.

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What can physical properties not separate?

Mashutka [201]

Color, phase, odor and boiling point are the physical properties. Reactivity with oxygen depends on the chemical nature of object, thus, it is not a physical property. It is a chemical property.

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3 years ago

Define an independent variable in an experiment. Explain the term with respect to the solubility of salt at different temperatur

nekit [7.7K]

Independent variable would be salt since you can't change it in this experiment.

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3 years ago

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

Identify the correct statement regarding the strength of chemical bonds.

allsm [11]

Answer:

<h2>B)</h2><h2><u><em>brainlist plz</em></u></h2>

Explanation:

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3 years ago

A jar of mixed nuts is a ________ mixture

Alisiya [41]

It is a heterogeneous mixture <span>
</span>

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3 years ago

Read 2 more answers

What's a closed system?Explain​

What's a closed system?Explain