1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Illusion [34]
3 years ago
5

* Who can help with this lol *

Chemistry
1 answer:
Viktor [21]3 years ago
5 0

Answer: subduction and sea floor spreading

Explanation:

He knew that the continents today were once joined together by fossil records of plants and animals that were found to be on continents far removed from each other. He knew this also by corresponding land forms that matches up as well. What he couldn’t prove is how the land masses would have moved so far away from each other. Subduction and sea floor spreading move the tectonic plates that the continents sit on. That’s what he was missing.

You might be interested in
If an object has a density of 0.00018 g/cm cubed, what density would it be if it had a mass of 10kg
Vladimir79 [104]

Answer:

Explanation:

first to get the density of some thing you have to devide the mass by the volume so 0.00018 (divided) by 10 kg and that gives you ur answer

3 0
2 years ago
Which of these elements is the most reactive
mr_godi [17]

Answer:

What elements?

Explanation:

The alkali metals are softer than most other metals. Cesium and francium are the most reactive elements in this group. Alkali metals can explode if they are exposed to water.

Not sure if this what you were talking about but here

This from google btw not gonna lie

7 0
3 years ago
Select the pair that consists of a base and its conjugate acid in that order. CO32−/CO22−
lana [24]

Answer: The pair that consists of a base and its conjugate acid in that order.NH_3/NH_4^+

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

H_3PO_4\rightarrow H_PO_4{2^-}+2H^+

H_2CO_3\rightarrow HCO_3^-+H^+

NH_3+H^+\rightarrow NH_4^+

HCO_3^-\rightarrow CO_3^{2-}+H^+

NH_3  is gaining a proton, thus it is considered as a brønsted-lowry base and after gaining a proton, it formsNH_4^+  which is a conjugate acid.

3 0
3 years ago
this is the chemical formula for methyl tert-butyl ether (the clean-fuel gasoline additive mtbe):a chemical engineer has determi
Alex17521 [72]

The Number of moles required for MTBE is 2 as per molarity based chemistry theories.

  1. A flammable liquid with a distinct, unpleasant smell is called methyl tert-butyl ether (MTBE).
  2. Since the 1980s, it has been added to unleaded gasoline as a fuel additive to promote more effective burning.
  3. It is created by mixing chemicals like isobutylene and methanol. Gallstones can be removed with MTBE as well.
  4. In this type of treatment, surgically inserted special tubes are used to deliver MTBE directly to the gall bladders of the patients.
  5. Methyl tert-butyl ether is a colorless liquid with a distinct anesthetic-like smell. Vapors are narcotic and heavier than air. 131 °F boiling point. 18 °F is the flash point.
  6. It is miscible in water and less dense than water. Boosts the octane of gasoline.
  7. Therefore it has 2 moles of oxygen.

To study about isobutylene -

<u>brainly.com/question/8409160</u>

#SPJ4

6 0
1 year ago
What is the half-life of a radioisotope if it decays to 25% of its original activity in 7 yr?
Pepsi [2]

Answer:

3.5 yrs

Explanation:

If a sample has decayed to 25%, this means 2 half-lives have passed. We are given this is equal to 7 yrs, and it follows that one half life is 3.5 yrs.

7 0
2 years ago
Other questions:
  • What is a hypothesis
    10·2 answers
  • The reaction of 11.9 g of chcl3 with excess chlorine produced 11.2 g of ccl4, carbon tetrachloride: what is the percent yield?
    8·2 answers
  • How are chemical bonds important in metabolism?
    12·1 answer
  • What do scientist do to easily share measurement data they can understand
    8·1 answer
  • Help me find the answer please
    10·2 answers
  • At constant volume, a tank of gas shows a pressure of 2500 atm at 290 K. The tank is then placed in a metal shed where the tempe
    11·1 answer
  • Find the number of atoms of arsenic in 28.62 moles of arsenic
    11·1 answer
  • How does the type of precipitation change currently?
    6·1 answer
  • PLEASE HELP PLEASE
    5·1 answer
  • Can someone help me on this one?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!