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3 years ago

an alpha particle is identical to a). a neutron b) a helium nucleus c) an electron d) a hydrogen nucleus

Chemistry

2 answers:

Kryger [21]3 years ago

6 0

Answer:

b) a helium nucleus

Explanation:

Alpha (α) particles are emissions from a radioactive nucleus, they occur when the nucleus loses 4 units of mass and 2 of atomic number.

They have less penetration than beta or gamma radiation and are composed of two protons and two neutrons, without electrons. That is why it has a +2 charge corresponding to the proton charge.

He nuclei are composed of 2 protons and two neutrons. This is why alpha particles are identical to their nucleus.

The Helium present in the atmosphere is the product of the emission of alpha particles. For example from the Radon gas that is mostly present in soil, water and rocks.

ElenaW [278]3 years ago

3 0

Alpha particles, also called alpha ray or alpha radiation, consist of two protons and two neutrons bound together into a particle identical to a <u>helium-4 nucleus. </u>They are generally produced in the process of alpha decay, but may also be produced in other ways.

Composition: 2 protons, 2 neutrons

Mass: 6.644657230(82)×10−27 kg; 4.0015061...

Electric charge: +2 e

Symbol: α, α2+, He2+

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4 years ago

Which of these is an example of food engineering?

Andrej [43]

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3 years ago

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How many moles of hydrogen gas will be produced if 5.00 moles of zinc reactions with an excess amount of sulfuric acid

harkovskaia [24]

Answer:

Moles of Hydrogen produced is 5 moles

Explanation:

The balanced Chemical equation for reaction between zinc and sulfuric acid is :

$Zn(s) + H_{2}SO_{4}(aq) \rightarrow ZnSO_{4}(aq) + H_{2}(g)$

This equation tells that ; when 1 mole of Zn react with 1 mole of sulfuric acid, it produces 1 mole of zinc sulfate and 1 mole of hydrogen.

Since sulfuric acid is in excess so Zinc is the limiting reagent

(Limiting reagent : Substance which get consumed when the reaction completes, limiting reagent helps in predicting the amount of products formed)

Limiting reagent (Zn) will decide the amount of Hydrogen produced

$Zn(s) + H_{2}SO_{4}(aq) \rightarrow ZnSO_{4}(aq) + H_{2}(g)$

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$5\ mole\ zinc\rightarrow 5\ mole\ H_{2}$

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3 years ago

you are studying an animal that produces only one offspring every three or four years. Is it likely to use external or internal

Igoryamba

Answer:

internal fertilization

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Internal fertilization enhances the fertilization of eggs by a specific male. Fewer offspring are produced through this method, but their survival rate is higher than that for external fertilization.

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3 years ago

Which of the following has a mass of 10.0 g?

Serjik [45]

Answer:

a. 0.119mol Kr

Explanation:

To solve this problem, we must understand that;

Mass = number of moles x molar mass

Molar mass of Kr = 83.3g/mol

Ar = 40g/mol

He = 4g/mol

Ne = 20.18g/mol

a0.119 mol Kr mass = 0.119 x 83.3 = 9.9g

b 0.400 mol Ar mass = 0.4 x 40 = 16g

C 1.25 mol He mass = 1.25 x 4 = 5g

d 2.02 mol Ne mass = 2.02 x 20.18 = 40.8

Krypton is the answer

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3 years ago

an alpha particle is identical to a). a neutron b) a helium nucleus c) an electron d) a hydrogen nucleus​

an alpha particle is identical to a). a neutron b) a helium nucleus c) an electron d) a hydrogen nucleus