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3 years ago

Polyatomic ions

Chemistry

1 answer:

Vitek1552 [10]3 years ago

5 0

I believe the answer is A.

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Many hospitals, and some doctors\' offices, use radioisotopes for diagnosis and treatment, or in palliative care (relief of symp

jekas [21]

Answer:

For a: The isotopic symbol of the above atom will be $_{53}^{131}\textrm{I}$

For b: The isotopic symbol of the above atom will be $_{77}^{192}\textrm{Ir}$

For c: the isotopic symbol of the above atom will be $_{62}^{153}\textrm{Sm}$

Explanation:

The isotopic representation of an atom is: $_Z^A\textrm{X}$

where,

Z = Atomic number of the atom

A = Mass number of the atom

X = Symbol of the atom

For a: Iodine-131

Atomic number of iodine = 53

Mass number of iodine = 131

Symbol of iodine = I

The isotopic symbol of the above atom will be $_{53}^{131}\textrm{I}$

For b: Iridium-192

Atomic number of iridium = 77

Mass number of iridium = 192

Symbol of iridium = Ir

The isotopic symbol of the above atom will be $_{77}^{192}\textrm{Ir}$

For c: Samarium-153

Atomic number of samarium = 62

Mass number of samarium = 153

Symbol of samarium = Sm

The isotopic symbol of the above atom will be $_{62}^{153}\textrm{Sm}$

7 0

3 years ago

PLEASE HELP! How many grams of a stock solution that is 87.0 percent H2SO4 by mass would be needed to make 200 grams of a 35.5 p

icang [17]

Your answer will be m1= 8.609 grams

7 0

4 years ago

Which one is idk what it is giving brainliest

Salsk061 [2.6K]

Answer:

B or C

Explanation:

I don't really know sorry.

8 0

3 years ago

Read 2 more answers

Help would be appreciated t.t

Serhud [2]

Answer:

a) H3PO4 (aq) + 3 KOH (aq) → K3PO4 (aq) + 3 H2O (l)

AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq)

Ca(OH)2 (s) + 2 H3PO4 (aq) → Ca(H2PO4)2 (s) + 2 H2O (l)

2 KI (aq) + Pb(NO3)2 (aq) → 2 KNO3 (aq) + PbI2 (s)

3 H2SO4 (aq) + 2 Al(OH)3 (s) → 6 H2O (l) + Al2(SO4)3 (aq)

All balanced equation for each reaction!!

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3 years ago

"An acid is a substance that forms hydrogen ions when dissolved in water." this is an example of-

ValentinkaMS [17]

Hmm. This is very unspecific but it could either be indicating the pH of the solution or just saying it is an aqeous solution.

5 0

3 years ago

Read 2 more answers