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2 years ago

If element X has 99 protons, how many electrons does it have

Chemistry

2 answers:

White raven [17]2 years ago

8 0

As long as it’s an atom then it would also have 99 electrons also

Tresset [83]2 years ago

3 0

99 electrons also. Protons and neutrons share the same number

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Answer:

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2 years ago

Consider a homogeneous mixture, such as a

gogolik [260]

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Explanation:

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2 years ago

Write balanced net ionic equations for the three reactions carried out in Part A given that the sulfur-containing product is the

Alik [6]

Answer:

Please find the complete question in the attached file.

Explanation:

Balanced equation: $8KMnO_4+14NaOH +Na_2S_2O_3 \longrightarrow 8Na_2MnO_4 +2K_2SO_4 +5H_2O +4KOH$

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$8K^{+} + 8MnO_4^{-}+14Na^{+}+ 14OH^- +2Na^+ S_2O_3^{-}\longrightarrow16Na^+8MnO_4^- +4K^+ + 2SO_4 +5H_2O+4K^+ +4OH^-$

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2 years ago

The name of the commonly used hardness scale is:

Wittaler [7]

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2 years ago

Read 2 more answers

Select all the correct answers. Which substances are made up of polymers? DNA a glass bottle ice crystals the proteins in hair r

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Answer:

DNA, the proteins in hair, rubber car tires.

Step-by-step explanation:

Polymers are large molecules consisting of long chains of small repeating units.

DNA is a natural polymer that consists of hundreds of millions of repeating units called nucleotides.

Hair protein consists of long chains of amino acid repeating units.

The rubber in car tires is a mixture of natural and synthetic rubber. Natural rubber consists of long chains of isoprene repeating units. In one type of synthetic rubber, the repeating units are butadiene and styrene molecules.

The glass in a bottle is not an organic polymer. However, some chemists consider it to be a highly cross-linked inorganic polymer of SiO₂.

Ice crystals are not even inorganic polymers, because the water molecules are held together only by hydrogen bonds, not covalent bonds.

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2 years ago