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4 years ago

All those questions

Chemistry

1 answer:

Alina [70]4 years ago

6 0

a. The two products for the reaction are Potassium Hydroxide and hydrogen gas.

2K₍s₎ +2H₂O₍l₎⇒ 2KOH₍aq) +H₂₍g₎

b. The piece of potassium melts and darts on the surface of the water then bursts into a lilac flame. This is because the reaction is highly exothermic- the heat produced makes the potassium melt.

c. Rubidium that has an electron configuration of 2.8.18.18.1 is extremely reactive with water since it has a very large atomic radius. the big atomic radius makes the outer electron loosely attached to the nucleus and thus it is easily lost during the reaction. Reaction under class conditions may cause an explosion.

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Taxonomic classification is a process of science that organizes living organisms by their structure, function, and relationships

DiKsa [7]

D) The broadest group of organization is known as the domain.

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4 years ago

During a chemical change items are lost or gained to make new substance true or false

Otrada [13]

Answer:

If you meant Atoms then the answer is false

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3 years ago

Any kind of help would be nice :)

alina1380 [7]

Answer:

1st page, number a-ENergy is added or absorbed

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3 years ago

Read 2 more answers

A 9.79 mol sample of freon gas was placed in a balloon. Adding 3.50 mol of freon gas to the balloon increased its volume to 21.8

aivan3 [116]

Answer:

16.06 L was the initial volume of the balloon.

Explanation:

Initial moles of freon in ballon = $n_1=9.79 mol$

Initial volume of freon gas in ballon = $V_1=?$

Moles of freon gas added in the balloon = n = 3.50 mole

Final moles of freon in ballon = $n_2=n_1+n=9.79 mol+3.50 mol=13.29 mol$

Final volume of freon gas in ballon = $V_2=21.8 L$

Using Avogadro's law:

$\frac{V_1}{n_1}=\frac{V_2}{n_2}$ ( at constant pressure and temperature)

$V_1=\frac{V_2\times n_1}{n_2}=\frac{21.8 L\times 9.79 mol}{13.29 mol}=16.06L$

16.06 L was the initial volume of the balloon.

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3 years ago

How do chemists use systems and order in their work?

san4es73 [151]

Answer:

5 point) Chemists used systems and order because they study the basic unit of all forms of matter, which is the atom . However, there are several different kinds of atoms, called elements . Chemists organize these elements using the periodic table .

Explanation:

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3 years ago