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borishaifa [10]
2 years ago
13

Who discovered copper

Chemistry
2 answers:
Komok [63]2 years ago
7 0

Explanation:

The exact person is unkown cooper has been around for ages since 9000 BC in the Middle East are the earliest discoveries

sesenic [268]2 years ago
5 0

Although various copper tools and decorative items dating back as early as 9000 BCE have been discovered, archaeological evidence suggests that it was the early Mesopotamians who, around 5000 to 6000 years ago, were the first to fully harness the ability to extract and work with copper

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Hemoglobin is the protein that transports oxygen in mammals. Different species of mammals have slightly different forms of hemog
Anna35 [415]

Answer;

= 64561.95 g/mole

Explanation;

mass of Fe in 100g = .346g

= .346 / 55.8452 moles

= 0.0061957 moles  

These represent 4 moles of Fe in the molecule so moles of hemaglobin

=  0.0061957/4  

= 0.0015489 moles  

these are in 100 g so mass of 1 mole = 100 / 0.0015489

= 64561.95 g / mole

molar mass of hemoglobin = 64561.95 g/mole

6 0
3 years ago
Picture a neutral S atom. This neutral atom will have
ser-zykov [4K]

Answer:

it will have 6 valence electrons

it will gain electrons

charge will be 2-

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2 years ago
The amount of energy available to do work after a chemical reaction has occurred is called
sveticcg [70]
Free energy is the answer i hope this helped
8 0
3 years ago
Which contains 3 significant figures.
jolli1 [7]
B, E, F have 3 significant figures
4 0
3 years ago
Please guysssss
mina [271]
If you would draw the Lewis structures of these atoms, you would see that A has 2 electron pairs and 2 lone electrons (that can bond). For B you’d see that you only have 1 electron that can form a bond. This means that 1 atom of A (2 lone electrons) can bond with 2 atoms of B. To know the kind of bond you have to know wether or not there will be a ‘donation’ of an electron from one atom to another. This happens when the number of electrons on one atoms is equal to the number of electrons another atom needs to reach the noble gas structure. As you can see, this is not the case here. This means that you get an AB2 structure with covalent character.
6 0
3 years ago
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