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svlad2 [7]
1 year ago
10

Hemoglobin ___________. (Select all that apply).

Chemistry
1 answer:
alexandr1967 [171]1 year ago
5 0

Answer:

Option B and A

Explanation:

  • First our lungs take purified oxygen from air then provide it to heart
  • Our heart gives oxygen to hemoglobin which is present in our blood
  • It carries oxygen to all cells
  • and comes back with cO_2
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A molecular covalent substance (such as co2) has a low melting point because the covalent bonds that hold the molecules together
Leona [35]

A molecular covalent substance (such as co2) has a low melting point because the covalent bonds that hold the molecules together are weak and do not require much energy to break:- False.

What are covalent bonds ?

An electron transfer that leads to the formation of electron pairs between atoms is known as a covalent bond. When atoms share electrons, a stable balance of the repulsive and attractive forces among them is known as covalent bonding. These electron pairs are also known as bonds or shared pairs.

It is a molecular compound, which is a mixture of at least two atoms—the smallest building blocks of matter—joined by a covalent bond. These atoms are joined by a covalent bond, which is formed when electrons are shared.

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2 years ago
How much heat is needed to boil 3,000 mL of water at its boiling point, 100 C?
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Answer: 100C of heat is needed.

Explanation: That is the heating point of water

3 0
3 years ago
If 60.2 grams of hg combines completely with 24.0 grams of br to form a compound what is the percent
NikAS [45]

Answer is: the percent composition of Hg in the compound is 71.5%.

Balanced chemical reaction: Hg + Br₂ → HgBr₂.

m(Hg) = 60.2 g; mass of the mercury.

m(Br₂) = 24.0; mass of the bromine.

m(HgBr₂) = m(Hg) + m(Br₂).

m(HgBr₂) = 60.2 g + 24 g.

m(HgBr₂) = 84.2 g; mass of the compound.

ω(Hg) = m(Hg) ÷ m(HgBr₂) · 100%.

ω(Hg) = 60.2 g ÷ 84.2 g · 100%.

ω(Hg) = 71.5%.

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3 years ago
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Technological advances in microbiology are providing evidence which indicates:
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Cells and microorganisms are extremely complex
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