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
Katyanochek1 [597]
3 years ago
8

Shells constructed from seawater incorporate the 18O/16O ratio of seawater during their lifetime within their CaCO3 shell walls,

providing a paleothermometer that is used to estimate the temperatures of ancient seas.
Chemistry
1 answer:
Ksivusya [100]3 years ago
6 0

Answer:

Hello, the above question is not complete, nonetheless let us check somethings out.

Explanation:

Paleothermometer definition is from two words, that is "Paleo" which means something that is old and ''thermometer" which is an instrument for measuring temperature. So, if we add this up, Paleothermometer is an instrument for measuring "old" temperature, that is temperature. One of the Paleothermometer that is been used is the δ18O which is the one in the question that has isotopic ratio of 18O/16O, and it deals with the measurement of 18O to 16O. The others include Alkenones Paleothermometer, Mg/Ca Paleothermometer, Leaf physiognomy and so on.

If the values of the isotopic ratio that is 18O/16O ratio is low, then the temperature is high. To Calculate the 18O/16O ratio for ancient ocean then we will be using the equation below;

δ18O = (z - 1) × 1000. Where z= [(18O/16O)/( 18O/16O)sm. And sm= standard mean.

You might be interested in
Out of 500 silicon atoms: 460 are si-28, which has a mass of 27.98 amu 25 are si-29, which has a mass of 28.98 amu and 15 are si
liberstina [14]

Answer;

=28.09 amu

Explanation;

In this problem, they did not give us the percentages. However, since we know the number of atoms, we can easily calculate the percentages. For example:  

(460 X 100)/500 = 92%  

If we do this for all three isotopes,

(460 × 25)/500 = 5 %

(460 × 15) /500 = 3%

-We get 92%, 5%, and 3%. (We'll assume these are absolute numbers for determining our significant figures).

Now the problem is just like the previous one. First convert the percentages into decimals. Then multiply those decimals by the masses and add. Here's the solution:  

= (0.92) X (27.98 amu) + (0.05) X (28.98 amu) + (0.03) X (29.97 amu)

= 25.74 amu  +  1.449 amu  + 0.8991 amu

= 28.09 amu

6 0
3 years ago
Read 2 more answers
When aqueous solutions of Li3PO4 and MgSO4 are mixed, Mg3(PO4)2 is a precipitate
Lesechka [4]

Answer:

Li2SO4

Explanation:

Balance the reaction of Li3PO4 + MgSO4 = Li2SO4 + Mg3(PO4)2 using this chemical equation balancer!

8 0
3 years ago
Which list of lab equipment and tools is a complete list needed to heat a reaction in a beaker with high heat?
frez [133]

Answer:

b

Explanation:

because i think it is right

3 0
3 years ago
the ph of a naoh solution is 12.05. what is the concentration of [oh-] of the naoh solution? express your answer in standard not
Vesnalui [34]

Answer:

12.05,oei

Explanation:

ceftfetwf

4 0
3 years ago
On a piece of paper, draw the structure of 3-heptyne. now describe the structure you have drawn:
mezya [45]

Explanation:

The name alkyne which includes the letters "yne" means that there are three bonds attache to the carbon at the specified place. It is an unsaturated hydrocarbon because it contains a triple bond.

For example, 3-heptyne is a seven membered carbon chain with a triple bond at carbon 3.

The formula of 3-heptyne is as follows.

                   C_{7}H_{12}

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which option correctly explains a metallic bond
    5·1 answer
  • PLZZ HELP!!!
    7·1 answer
  • Which trait enables a polar bear to survive an extremely cold climate.
    13·2 answers
  • The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of a given amount to decay?
    5·1 answer
  • Which of the following subatomic particles is found the farthest from the center of the atom?
    14·1 answer
  • Similar
    7·2 answers
  • In order to become stable, Potassium, K, will _______ and have a resulting charge of _____.
    15·1 answer
  • Which of the following can cause muscle fatigue ?
    11·1 answer
  • What are the different rows called
    8·1 answer
  • What is the name for potassium oxide's structure? Give two properties of potassium oxide.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!