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klemol [59]
3 years ago
11

How many electrons, neutrons and protons isotopes have?

Chemistry
1 answer:
mars1129 [50]3 years ago
5 0

How many protons, neutrons, and electrons are there in an atom of uranium-238? Write the symbol for this isotope. The atomic number of uranium (see periodic table) is 92, and the mass number of the isotope is given as 238. Therefore, it has 92 protons, 92 electrons, and 238 — 92 : 146 neutrons.

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The sun's motion across the sky is caused by _____.
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The earths rotation. The earth rotates and as it rotates, the sun moves across the sky

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Please help me with this chemistry question. Image attached.
Leya [2.2K]

Answer:

Moles of zinc chloride produced are 0.09942 moles.

Explanation:

Zn+2HCl\rightarrow ZnCl_2+H_2

Mass of zinc used = 6.5 g

Moles of zinc =\frac{6.5 g}{65.38 g/mol}=0.09942 mol

According to reaction, 1 mol of zinc gives 1 mole of zinc chloride,then 0.09942 moles of zinc will give :

\frac{1}{1}\times 0.09942 =0.09942 mol of zinc chloride

Moles of zinc chloride produced are 0.09942 moles.

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3 years ago
The noble-gas notation for tin (Sn) will contain the symbol Ar Kr Xe Rn
KIM [24]

Answer: Noble-gas notation of Sn contains Kr.

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Nearest noble gas to this element is Krypton which has an atomic number 36.

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As seen from above, Noble gas Krypton having symbol 'Kr' is coming in the electronic configuration for Tin.

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4 years ago
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What would you predict about the reaction of potassium in hydrochloric acid compared to potassium in water?
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<span>Define a Potassium Reaction: A Potassium Reaction involves a process in which Potassium is mixed with another substance which react to form something else. Reactions are manifested by the disappearance of properties characteristic of Potassium and the appearance of new properties in the new substance or Compound. The substances initially involved in a reaction are called reactants or reagents. The most important of the Potassium compounds is Potassium chloride (KCl) which is used in the production of fertilizers and chemicals and also as a salt substitute. Other important compounds are Potassium nitrate (KNO3), also known as saltpeter which is used in the production of gunpowder, fertilizers and pyrotechnics and Potassium hydroxide (KOH) is used to make detergents and soaps. Reactions are described with Chemical Formula and Equations.</span>

 
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An area with an average annual temperature of more than 64°F and greater than 59 inches of annual rainfall would be an example o
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Based on the temperature and rainfall, it is the tropical

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3 years ago
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