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nordsb [41]
3 years ago
6

The geological era about which we have the least information is called _____.

Chemistry
2 answers:
snow_lady [41]3 years ago
7 0

Answer:

<u>Hadean</u>

Explanation:

  • This a geologic eon period on earth dating to archean it begins with the formation of the planet about some 4.6 billion years ago. As data of 2016 ICS <u>International commission on Stratigraphy describes its status as "informal". </u>
  • As geologist Preston cloud named this eon in 1972, before the earliest known rock formations on earth. Also called as the Priscoan period" or ancient rock period. Word Hadean also signified the Greek god of the underworld.
  • The geologists believe that a sizeable quantity of water could have been the prime source of earth and that water molecules would have escaped due absence of earth gravity. It also asserted that the parts of the earth might have been disrupted due to the formation of the moon.
iVinArrow [24]3 years ago
4 0
Cretaceous Period.............

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The nucleus’ pull on its electrons, taking into account any attractions weakened by shielding is called the:
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Answer:

It's called the shielding effect

Explanation:

It describes the decrease in attraction between an electron and the nucleus in any atom with more than one electron shell. (I hope this helps)

8 0
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Write the balanced net ionic equation for the reaction that occur in the following case. Cr2(SO4)3(aq)+(NH4)2CO3(aq)→
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Cr2(SO4)3(aq) + 3(NH4)2CO3(aq) → 3(NH4)2SO4(aq) + Cr2(CO3)3(s) 

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6 0
3 years ago
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A doctor's Order is 0.125 g of ampicillin. The liquid suspension on hand contains 250 mg/s. How many milliliters (mL) of the sus
Molodets [167]

Answer:

c) 2.5 mL

Explanation:

Solution

Doctors order = 0.125g

and

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= 0.250g/5ml

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7 0
3 years ago
A gas at 1.5 atm had pits ressure decreased to 0.50 atm producing a new volume of 750 ml what was its original volume
Vlada [557]

Answer:

The original volume of the gas is 0.001 mL

Explanation:

This easy excersise can be solved by the law for gases, about pressure and volume; the volume of a gas is inversely proportional to the pressure it exerts.

We can propose the rule by this formula:

P₁  / V₁ = P₂ / V₂

We replace data given: 1.50 atm / V₁ = 0.50 atm / 750 mL

As the rule says, that volume is inversely proportional, and the pressure was decreased, volume must be lower than 750 mL.

1.5atm / (0.5 atm / 750mL) = V₁

V₁ = 0.001 mL

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35 Given the word equation:
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When the reactant is single compound before the reaction and become more than single compound after reaction is called decomposition reaction
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3 years ago
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