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3 years ago

_____ is the most abundant gas in th Earths atmosphere?

Chemistry

2 answers:

taurus [48]3 years ago

8 0

Hey there!

The answer to your question is:

Nitrogen

Hope this helps! :)

ollegr [7]3 years ago

5 0

The answer to the question would be B since Nitrogen is the most abundant gas in our atmosphere

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Define density of a substance.

ozzi

Answer:

density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre. ... Density can also be expressed as kilograms per cubic metre (in metre-kilogram-second or SI units).

Explanation:

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3 years ago

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Why should you add acid to water rather than add water to acid when preparing solutions?.

victus00 [196]

Answer:It is because acid and water react violently exothermically, producing heat and occasionally melting the fluid.

Explanation:

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4 years ago

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Which of the following isotopes would most likely be unstable and therefore radioactive?

svlad2 [7]

Answer: Mercury-194 is an unstable isotope and hence is radioactive.

Explanation: Mercury-194 is an isotope of mercury, having formula $_{80}^{194}\textrm{Hg}$

Number of protons in this isotope = 80

Number of neutrons in this isotope = 114

This isotope is radioactive in nature and under decay process by Electron Capture.

Electron capture reactions are the reactions in which a proton in a nucleus absorbs an electron and convert it into neutron. The resulting nucleus will have a decreased atomic number and same atomic mass.

Reaction for electron capture of mercury-194 follows:

$_{80}^{194}\textrm{Hg}+_{-1}^0\textrm{e}\rightarrow _{79}^{194}\textrm{Au}$

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3 years ago

Which of the protist is the most complex organism ?

Evgen [1.6K]

Which of the protist is the most complex organism ?

A) paramecium

<u>B) amoeba </u>

C) Euglena

D) Volvox

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3 years ago