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3 years ago

Which statements describe inorganic compounds? Check all that apply.

1 answer:

6 0

Inorganic compounds contain carbon. Inorganic compounds usually lack carbon. Inorganic compounds are not associated with or made from living things

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______ contributes to the nitrogen cycle by removing nitrogen from the air and converting it into a form that is usable by plant

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Answer: Bacteria✅

Explanation:

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2 years ago

How many grams of carbon are contained in one mole of C3H8?

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Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles C3H8, or 44.09562 grams

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2 years ago

Molecules that contain nothing but hydrogen and carbon are

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Hydrocarbons. They usually burn. In fact, I can't think of one that does not.

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3 years ago

A radioisotope decays to give an alpha particle andPb-208.

oee [108]

Answer: The original element is $_{84}^{212}\textrm{Po}$

Explanation:

Alpha decay is defined as the process in which alpha particle is emitted. In this process, a heavier nuclei decays into a lighter nuclei. The alpha particle released carries a charge of +2 units.

The released alpha particle is also known as helium nucleus.

$_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_2^4\alpha$

For the given alpha decay process of an isotope:

$^{Z}_{A}\textrm{X}\rightarrow ^{208}_{82}\textrm{Pb}+_2^4\alpha$

To calculate A:

Total mass on reactant side = total mass on product side

A = 208 + 4

A = 212

To calculate Z:

Total atomic number on reactant side = total atomic number on product side

Z = 82 + 2

Z = 84

The isotopic symbol of unknown element is $_{84}^{212}\textrm{Po}$

Hence, the original element is $_{84}^{212}\textrm{Po}$

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3 years ago

Which are geologic evidence?

Naya [18.7K]

The scientific study of the origin, history, structure, and composition of the earth.

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3 years ago