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Radda [10]
4 years ago
13

Describing physical and chemical changes:

Chemistry
1 answer:
svetoff [14.1K]4 years ago
8 0
Physical: The chemist could try to bend it to find out how malleable it is. He could also try to pull it into wires to find out how ductile it is.

Chemical: The chemist could put the metal into contact with other substances to get an idea of how reactive it is, and he could try to burn it and find out how flammable it is.
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The number of calories in 10 grams of sugar is an example of a(n) ___________________.
DanielleElmas [232]

Answer:

Extensive is the answer of this question?

4 0
4 years ago
Please help I’ll mark you as brainliest if correct!
Brums [2.3K]

Answer:

C.

Explanation:

Gas molecules are diatomic which means it usually comes in 2.

So, H2(g)+O2(g) is H2O (l)

The first one is OH(hydroxide, not water)

Second one is not gas(not diatomic)

Answer is C.

8 0
3 years ago
The elements located in the lower left corner of the Periodic Table are classified as
Rasek [7]
<span>In the lower left corner of the Periodic table are elements of the Group 1 and they are called Alkali metals. The Alkali metals are highly reactive elements that readily lose their outmost electron to form cations with charge +1. The elements are: rubidium ( Rb ), caesium ( Cs ) and francium ( Fr ). Answer : 1 ) Metals
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3 0
3 years ago
Sodium chlorate, NaClO3, decomposes when heated to yield sodium chloride and oxygen, a reaction used to provide oxygen for the e
netineya [11]
Sodium chlorate decomposes into sodium chloride and oxygen.
The reaction is
NaClO3 --Δ--> NaCl + O2
The Δ means that heat is used
This equation is still not balanced.
Balancing the equation
2NaClO3 --Δ--> 2NaCl + 3O2
The equation is now balanced.
3 0
3 years ago
The atomic number of an element:
Aleonysh [2.5K]

Answer:

I think #3 might be the answer .

Because in #1 atomic mass tells mass .

#4 Atomic number doesnot only tell about the electrons atom has

6 0
3 years ago
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