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dem82 [27]
3 years ago
5

What kind of properties can only be observed when a substance changes into a different substance? physical properties reaction p

roperties chemical properties changing properties
Chemistry
2 answers:
Vitek1552 [10]3 years ago
8 0

When a substance changes into a different substance, you are observing its chemical properties.

In a physical change, the substance must <em>not </em>change into a different substance.

The physical and chemical properties of a substance do <em>not</em> change.

balu736 [363]3 years ago
7 0
<h3>Answer:</h3><h2>C. Chemical properties</h2><h3>Explanation:</h3>

By its very definition, a chemical property is one which is exhibited as a result of a chemical reaction. This may happen during or after the reaction. This is because in a chemical reaction there is a transformation in the physical composition of the components and this directly affects its chemical properties.

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Decomposition of NI3 produces nitrogen gas and iodine. How many grams of the reactant would be required to react completely to g
VMariaS [17]

Answer:

Grams of the reactant would be required is 8.26 g

Explanation:

Decomposition of NI3 is :

2 NI3 (s) --------------------> N2 (g)............... +..................... 3 I2 (g)

2 mol..................................1 mol.........................................3 mol

2 x 394.7 g/mol..............28 g/mol....................................3 x 253.8 g/mol

789.4 g...............................28 g...........................................761.4 g

From chemical equation it is cleared that

761.4 g of iodine is obtained from = 789.4 g of NI3

Therefore,

7.97 g of iodine is obtained from = 789.4 g x 7.97 g / 761.4 of NI3

                                                       = 6291.518 / 761.4 of NI3

                                                       =  8.26 g  of NI3

Hence

Grams of the reactant would be required = 8.26 g

5 0
3 years ago
What are thermosetting plastics???​
mina [271]

Explanation:

Thermosetting plastic are made up of long chain of molecules which are cross-linked and can be moulded into different shape and size.

6 0
3 years ago
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Percentage composition of a compound is a ratio of an amount of each element to the total amount of individual elements in a compound, which is then multiplied with 100.
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How many elements does a compound need to form?
Vinvika [58]

Answer:

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3 years ago
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C.Doesn't
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the other two arent anything.

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3 years ago
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