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fenix001 [56]
3 years ago
14

Fossils found in layers of sediment give us clues to Earth's past. Based on the fossil record of this area, we can assume that t

his area was
A.once a desert
B.once underwater
C.much colder in the past
D.located ina different place on earth
I ALREADY KNOW THE ANSWER I'M JUST GIVING SOMBODY SOME FREE POINTS IF THEY ANSWER.THE ANSWER IS B. ONCE UNDERWATER 
Chemistry
2 answers:
Kipish [7]3 years ago
4 0

it is b ...................

laiz [17]3 years ago
3 0

it is b no problem underwater


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When barium becomes positively charged, it forms a(n): (2 points)
mart [117]

Barium forms cation : Ba²⁺

<h3>Further explanation</h3>

Given

Barium element

Required

Ion type

Solution

Barium with the symbol Ba is an alkaline earth metal element having the atomic number 56

Electron configuration of Barium: [Xe] 6s2

If we look at this configuration, then Barium will try to achieve stability by removing 2 electrons so that the electron configuration is the same as the noble gas Xenon (Xe)

Because it removes 2 electrons, Barium has the number of protons> the number of electrons so that the charge is positive and forms a cation

3 0
3 years ago
An ionic compound contains an unknown ion X and has the formula X3N2. Ion X contains 10 electrons. Write down the chemical symbo
Delvig [45]

Answer:

Mg3N2

Explanation:

it would be magnesium as it would loss to electron so it would have 10 electron. you can see in the picture above .

hope this helps :)

8 0
3 years ago
A 2.0 L container of nitrogen gas had a pressure of 3.2 atm. What volume would be necessary to decrease the pressure to 1.0 atm
beks73 [17]

Answer:

6.4 L

Explanation:

When all other variables are held constant, you can use Boyle's Law to find the missing volume:

P₁V₁ = P₂V₂

In this equation, "P₁" and "V₁" represent the initial pressure and volume. "P₂" and "V₂" represent the final pressure and volume. You can find the theoretical volume by plugging the given values into the equation and simplifying.

P₁ = 3.2 atm                      P₂ = 1.0 atm

V₁ = 2.0 L                          V₂ = ? L

P₁V₁ = P₂V₂                                                    <----- Boyle's Law

(3.2 atm)(2.0 L) = (1.0 atm)V₂                        <----- Insert values

6.4 = (1.0 atm)V₂                                           <----- Simplify left side

6.4 = V₂                                                        <----- Divide both sides by 1.0

6 0
2 years ago
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Gala2k [10]

Answer:

B only

Explanation:

Using the VSEPR principle, the electron bond pairs and the lone pairs on the middle atom help us predict the structure of the molecule. The shape of a molecule is determined by the position of the nucleus and its electrons. The electrons and the nucleus settle in positions that minimize repulsion and maximize attraction.

4 0
3 years ago
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ziro4ka [17]

The correct answer to your question is

Basic. it is the is the basic unit of non living things.

Hope this helps!

6 0
3 years ago
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