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3 years ago

7

Which best describes a radioactive isotope?

1 answer:

sergiy2304 [10]3 years ago

5 0

Answer:

A radioactive isotope, also known as a radioisotope, radionuclide, or radioactive nuclide, is any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta, and gamma rays.

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The isotope carbon-14 has 6 protons and an atomic mass of 14. Carbon-14 has:

Aleks [24]

Carbon has 7 neutrons

Hope this helps

5 0

3 years ago

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Nitrous oxide (n2o), or laughing gas, is commonly used as an anesthetic in dentistry and surgery. how many moles are present in

Gelneren [198K]

Answer is: 0.375 moles are present in 8.4 liters of nitrous oxide at stp.

V(N₂O) = 8.4 L.

V(N₂O) = n(N₂O) · Vm.

Vm = 22,4 L/mol.<span>
n</span>(N₂O) = V(N₂O) ÷ Vm.

n(N₂O) = 8.4 L ÷ 22.4 L/mol.

n(N₂O) = 0.375 mol.<span>
Vm - molare volume on STP.</span>

5 0

3 years ago

Which way can heat never flow?

Elena L [17]

Which way can heat never flow?

The wrong answer is a,c,d

The correct answer is b. Cold to Hot

7 0

3 years ago

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The formula for calcium oxide is CaO. What are the formulas for magnesium oxide and strontium oxide?

Hunter-Best [27]

Answer:

Formula of magnesium oxide is MgO and formula of strontium oxide is SrO

Explanation:

Ca, Mg and Sr are same group bivalent metals.

Oxygen is a bivalent element

In general, formula of a compound made of a cation $M^{x+}$ and an anion $A^{y-}$ is $M_{y}A_{x}$ for $x\neq y$

When x = y, formula of the compound becomes MA

As both these metals and oxygen are bivalent therefore formula of magnesium oxide is MgO and formula of strontium oxide is SrO.

8 0

3 years ago

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The elementary gas-phase reaction takes place isobarically and isothermally in a PFR where 63.2% conversion is achieved. The fee

a_sh-v [17]

Answer:

Explanation:

check below for explanation in the attached files.

6 0

3 years ago