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Vilka [71]
3 years ago
11

Why do sea and ocean levels recede (more coast land is exposed) when the planet goes through a major ice age?

Chemistry
1 answer:
fomenos3 years ago
3 0
This happens because ice is made up of water, and when that water freezes, it never goes back to land, thus there being less water on the coastline. But when the ice starts to melt, the water will even out quickly, and the water will go to the coastline, causing the tide to rise. Mark brainliest, please.

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How many molecules of carbon dioxide are present in 4.81042 mol of that substance?
Korvikt [17]

1 mol is equal to 6.02×10∧23 molecules.

first put in the calculator 4.81042 × 6.02 then hit EXP or 2nd then EE. (Depends on the type of calculator). then put in 23 and press equal.

The calculator will says 2.89587284×10∧24.

So the answer will be 2.90×10∧24.

I mot sure if the 2.90 is correct but it is close to the answer. it really depends how you want to round it. As long as the decimals are close the answer doesn't matter. Hope this helps. Please mark as Brainliest.

4 0
4 years ago
When the moon is between the earth and the sun how is the moon most likely seen
kvasek [131]

Its seen like the lunar shadow

7 0
4 years ago
1) Sodium chloride undergoes an electrolysis reaction producing two new substances. One is a metal and the other is a gaseous el
Lena [83]

Metallic sodium and chlorine gas are produced by the electrolysis of molten sodium chloride.

<h3>What is a word equation?</h3>

A word equation represents a chemical reaction using the names of the substances involved.

a) Word equation:

Sodium chloride + electrolysis →  Sodium hydroxide + Hydrogen gas, Chlorine gas

b) The following reactions take place during the electrolysis of brine solution :

NaCl =Na^+ +Cl^-

H_2O =H^+ +OH^-

Now there are two cations and two anions which get discharged in the following way :

At cathode : 2H^+ +2e^- = H_2

At anode: 2Cl^- - 2e-=Cl_2

The remaining ions

Na^+ +OH- = NaOH

That's why we get H_2, Cl_2 and NaOH.

c) Balance each equation is:

2NaCl (l)  →   2Na(s) + Cl_2(g)

Learn more about the word equation here:

brainly.com/question/14385236

#SPJ1

5 0
2 years ago
If 7.25g of chlorine is reacted with excess hydrogen and produces 7.25 g HCl. What is the percent yield?
lozanna [386]

Answer:

94.61 %

Explanation:

percent yield = (actual yield / theoretical yield) X 100%

The balanced equation for the reaction is:

H2 (g ) + Cl2(g) => 2 HCl (l)

So, the theoretical yield =  

 7.25g of chlorine X (2mol of Cl / 35.453 g of Cl) X (2mol Cl / 2mol of HCl) X  37.469g of Hcl / 2mol of Hcl = 0.409 x 18.735 = 7.663g of Hcl

Using this theoretical yield and the provided value for actual yield, the percent yield = (actual yield / theoretical yield) X 100%

= (7.25 g / 7.663g) X 100

= 94.61 %

   

3 0
3 years ago
Ice sheets once covered the upper northeastern portion of the United States.<br> True or False?
choli [55]

Answer:

I do believe the answer is false.

Hope This Helps!!

4 0
3 years ago
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