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Helga [31]
3 years ago
11

3. Are quartz and coal minerals or only naturally occurring substances?

Chemistry
1 answer:
klasskru [66]3 years ago
6 0

Answer:

minerals

Explanation:

coal is made from decomposing matter

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The process by which waste products are eliminated from the cell by diffusion through the cell membrane is called _____.
madam [21]

Answer:

Exocytosis

Explanation:

8 0
2 years ago
30 its ASAP!!!! What is the volume, in liters, occupied by 0.485 moles of Oxygen gas at 23.0 oC and 0.980 atm?
USPshnik [31]
Use the universal gas formula

PV=nRT
where
P=pressure ( 0.980 atm)
V=volume (L)
T=temperature ( 23 ° C = 23+273.15 = 296.15 ° K)
n=number of moles of ideal gas (0.485 mol)
R=universal gas constant = <span>0.08205 L atm / (mol·K)

Substitute values,
Volume, V (in litres)
=nRT/P
=0.485*0.08205*296.15/0.980
= 12.0256 L
= 12.0 L (to three significant figures)

</span>
5 0
3 years ago
In the Gizmo, solid ice is gray, liquid water is blue, and water vapor gas is light blue. Heat or Chill the water as needed. Wha
Sauron [17]

It would be a solid because at -20 °C it has turned to ice

7 0
3 years ago
Cree que podríamos vivir sin leyes
astraxan [27]

Answer:

nop

Explanation:

porqUE todo sería un desastre

3 0
3 years ago
What type of reaction is pb(no3)2(aq) + 2kcl(aq) ® pbcl2(s) + 2kno3(aq)?
Sladkaya [172]

The given reaction is,

Pb(NO_{3})_{2}(aq) +2 KCl(aq) --->PbCl_{2}(s) + 2 KNO_{3}(aq)

In this reaction, the positive and negative ions of both the reactants rearrange resulting in the formation of new compounds. Such a reaction is referred to as the double replacement or the double displacement reaction. These type of reactions usually take place in aqueous medium and one of the products is a precipitate.

Double displacement reactions are of three types, precipitation reaction, neutralization reaction and reaction involving the formation of a gas. The given reaction is a precipitation reaction as one of the products is a solid.

6 0
3 years ago
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