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Arlecino [84]
3 years ago
15

Which type of matter needs to be separated by chemical methods ( breaking of bonds required ) such as electrolysis or decomposit

ion
Chemistry
1 answer:
Irina18 [472]3 years ago
6 0

The correct answer is compound.  

The compounds comprise two or more elements, which are bonded together chemically, and can be dissociated, that is, distinguished by reforming and breaking the chemical bonds, by the decomposition reactions, like thermal decomposition or electrolysis. The process of decomposition generate simpler compounds or individual elements.  


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Question 3(1 point)
SVETLANKA909090 [29]

Answer:

<u><em>Group 8 is a group (column) of chemical elements in the periodic table. It consists of iron (Fe), ruthenium (Ru), osmium (Os) and hassium (Hs). They are all transition metals.</em></u>

Explanation:

5 0
3 years ago
The boiling point of water is 100.00 °C at 1 atmosphere.
Oksana_A [137]

Answer:

The solution's boiling point is 100,2°C and its molality is 0,13 m

Explanation:

This is the colligative propertie about elevation of boiling point

ΔT = Kb . m . i where

ΔT is the difference between T° at boiling point of the solution - T° at boiling point of the solvent pure

Kb means ebulloscopic constant (<u><em>0,52 °C.kg/m .- a known value for water</em></u>)

m means molality (moles of solute in 1kg of solvent)

i means theVan 't Hoff factor ( degree of dissociation for a compound)

IT HAS NO UNITS

NiI2 ---> Ni2+  +  2I-  (we have 1 Ni2+ and 2 I-), the i for this, is 3

The 11,11 g of the salt are in 272,2g of water but I need to know how many mass of the salt is in 1000 g of water (1000 g is 1 kg) so the rule of three is:

272,2g ____ 11,11g

1000g _____ (1000 g . 11,11g) / 272,2g = 40,81g

As the molar mas of NiI2 is 312.5 g/mol, the moles of salt are, mass/molar mass, 40,81g /312.5 g/mol = 0,130 moles

T° of b p sl - 100°C = 0,52 °C.kg/m . 0,130 m/kg . 3

T° of boiling point solution = (0,52 °C.kg/m . 0,130 m/kg . 3) + 100°C

T° of boiling point solution = 100,2°C

4 0
3 years ago
Find an element that has the same
navik [9.2K]

Answer:sodium

Explanation: because its not hard to look on the PERIODIC TABLE

4 0
3 years ago
why do all of these elements- hydrogen, helium, lithium, and beryllium all have negative charges? explain
Dmitry_Shevchenko [17]
They all don’t, they also can have positive charges like LiOH (Lithium Hydroxide)
3 0
3 years ago
So it will help you see what is 5 times 9 it is 40.
dolphi86 [110]

Answer:

40

Explanation:

5+5+5+5+5+5+5+5+5=40

7 0
3 years ago
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