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photoshop1234 [79]
3 years ago
10

For the following nuclear reaction, what was the beginning radionuclide (X)? X → 86Rn222 + 2He4

Chemistry
1 answer:
BigorU [14]3 years ago
3 0
The original radioisotope underwent double-alpha decay, where the original nucleus lost a total of 4 protons and 4 neutrons.

The original radioisotope would have an atomic number of 86+4 (protons), and would have an atomic mass of 222+8 (protons + neutrons). This would make the element Thorium-230, or 90Th230.
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When reacted with elemental chlorine at room temperature, liquid phosphorous trichloride (PCl3) is converted to solid phosphorou
Sergeu [11.5K]

PCl₅ reacts upon contact with water to launch hydrogen chloride and supply phosphorus oxides. the primary hydrolysis product is phosphorus oxychloride     PCl₅ + H₂O ========>  POCl₃ + 2HCl.

Phosphorus trichloride appears as a colorless or slightly yellow fuming liquid with a pungent and irritating odor resembling that of hydrochloric acid. Causes severe burns to skin, eyes and mucous membranes.

Divide the mass of the material through its molar mass. The molar mass of a substance is the mass in grams of 1 mole of that substance. This mass is given via the atomic weight of the chemical unit that makes up that substance in atomic mass units.

One mole is described as the amount of substance containing as many number one entities atoms, molecules, ions, electrons, radicals, and lots of others. As there are atoms in 12 grams of carbon - 12(6. 023×10²³. The mass of one mole of a substance equals to its relative molecular mass expressed in grams.

Learn more about  phosphorous trichloride here:-brainly.com/question/2626850

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6 0
2 years ago
silicon, tin, and lead are all in the same group. the density of tin is about 7.28 g/cm3 and the density of lead is about 11.34
Sophie [7]

The atom's radius and mass increase from top to bottom. The density of elements from top to bottom also increases in a periodic table.

Density of Sn= Mass of Sn/Volume of Sn

                     =24.3968/7.28

                     =3.49 g/ml*ml/cm³

                     =3.49 g/cm³

It is accurate to assume that the density of Sn will fall between that of Si and lead .  the mass number and radius of the atoms increase from group to group as we move from top to bottom in a periodic table.. The density rises because the increase in mass number is greater than the increase in radius. Simply multiplying by the molar mass of the gas  allows one to derive the formula for mass density from the formula for number density. Do not forget that the mass is equal to the moles (n) times the molar mass (M).  Smaller masses can be measured in grams instead of kilograms (kg), which is the standard SI unit for mass.

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brainly.com/question/406690

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7 0
2 years ago
Using dimensional analysis, how many seconds are in 1.2 days?
julsineya [31]

Answer:

103,680 seconds

Explanation:

1.2 days x  \frac{24 hours}{1 day} \frac{60 minutes}{1 hour} \frac{60 seconds}{1 minute}

(1.2)(24)(60)(60) = 103,680 seconds

4 0
3 years ago
You can start an experiment as soon as you are ready.
cestrela7 [59]

Answer:

what?

Explanation:

8 0
3 years ago
Using the solubility curve, what is the effect of increased temperature on the solubility of KBr in 100 grams of water?
earnstyle [38]
Here, Curve is nor provided but in general, Increase in Temperature increases the solubility of the solution, so it would be increase
(Brainliest please)
4 0
3 years ago
Read 2 more answers
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