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RoseWind [281]
3 years ago
5

Corals absorb ______ from the ocean to form their skeletons.

Chemistry
2 answers:
Nina [5.8K]3 years ago
3 0
<span>They absorb calcium ions and bicarbonate (hydrogen carbonate) ions.
Sooo B
I hope this helps! :)
</span>
saul85 [17]3 years ago
3 0

Answer: The correct option is b. Calcium

Explanation: Ocean water consists of a large amount of Chloride (Cl^-), Sulfate (SO_4^{2-}), Magnesium (Mg^{2+}), Sodium (Na^+), Calcium (Ca^{2+}) and Potassium (K^+) ions.

The coral animals absorb calcium element from the ocean to form their skeleton. Then, the calcium ions combine with carbon and oxygen to form calcite.

Hence, the correct option is b.

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What makes a heterogeneous mixture different from a homogeneous mixture? The components are mixed unevenly instead of evenly wit
bazaltina [42]
<span>is a mixture that composes of components that aren't uniform or they have localized regions that all have different properties. Despite the term appearing to be highly scientific, there are various common substances that are heterogeneous mixtures

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8 0
3 years ago
When you jump-starts a car, what happens to the stored energy in the working battery? PLEASE ANSWER
Yuri [45]
The stored energy in the battery does not work anymore.
4 0
3 years ago
A mixture of gases contains 4.46 moles of neon (Ne), 0.74 mole of argon (Ar), and 2.15 moles of xenon (Xe). Calculate the partia
viva [34]

Explanation:

The partial pressure of an individual gas is equal to the total pressure of the mixture multiplied by the mole fraction of the gas.

Total pressure = 2atm

Mole Fraction = number of moles / total number of moles

Neon

Mole Fraction = 4.46 / 7.35 = 0.607

Partial Pressure = 0.607 * 2 = 1.214 atm

Argon

Mole Fraction = 0.74 / 7.35 = 0.101

Partial Pressure = 0.101 * 2 = 0.202 atm

Xenon

Mole Fraction = 2.15 / 7.35 = 0.293

Partial Pressure = 0.293 * 2 = 0.586 atm

5 0
3 years ago
0.00000000082 -<br> scientific notation
Nadusha1986 [10]

Answer:

8.2 x 106^-11

Explanation:

To begin this problem you must remember the basic rule of scientific notation, which is, must be between 1-10. .000000000082 is much smaller than 1. However by moving the decimal 11 spots to the right, we can make it 8.2

Continue to move the decimal to the right until the value is in the 1-10 range. Make sure to count the moves to the right.

Once the decimal is in the right spot count the spots moved.

Since the number is wayyy smaller than the answer given the number will be negative 10^-11, in order to make it what is was before.

6 0
3 years ago
Fill in the chart to describe and give examples of physical changes.
frosja888 [35]

Answer:

here are some examples of physical change!!!

Explanation:

-An ice cube melting into water in your drink.

-Freezing water to make ice cubes.

-Boiling water evaporating.

-Hot shower water turning to steam.

-Steam from the shower condensing on a mirror.

8 0
3 years ago
Read 2 more answers
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