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Softa [21]
3 years ago
13

What step of the scientific method might be the most difficult when studying creature's that lived millions years ago

Chemistry
1 answer:
Aleksandr-060686 [28]3 years ago
8 0

Answer:

Experiment

Explanation:

It would be hard to develop a procedure to test the hypothesis

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BRAINLIESTTT ASAP!! PLEASE HELP ME :)
skad [1K]

You are given both the energy level,  n  =  4, and the subshell, l = 3  on which the electrons reside.

The subshell is given to you by the angular momentum quantum number,  l  which can take value that ranges from  0  to  n  −  1

l  =  0  →  the s-subshell

l  =  1  →  the p-subshell

l  =  2  →  the d-subshell

l  =  3  →   the f-subshell

<u>For n = 4 and l = 3, ml can be -3, -2, -1, 0, +2, +2, and +3. </u>

<u>Each of these can have 2 electrons (+1/2 and -1/2 spin) for a total of 14 electrons.</u>

8 0
3 years ago
The role mantle convection plays in plate tectonics
Mrac [35]
The rolling magma causes uneven currents in underneath the earths crust. Sort of similar to wind patterns in the sky but think of them as underground and in a much thicker fluid. Ocean currents might be a better analogy. Because of it being a much more viscous fluid, there is greater pressure buildup which can cause torsion, compression, expansion etc. when you bake a cake look how the dough underneath expands & the top crust cracks and stretches. Hope that helps.
6 0
3 years ago
What would be the result of adding one proton to an atom
chubhunter [2.5K]

Answer:

Protons carry a positive electrical charge and they alone determine the charge of the nucleus. Adding or removing protons from the nucleus changes the charge of the nucleus and changes that atom's atomic number. For example, adding a proton to the nucleus of an atom of hydrogen creates an atom of helium.

i hope this helps!

5 0
3 years ago
10) How many grams are there in 1.00 x 10^24 molecules of BC13?
lana66690 [7]

194.5 g of BCl₃ is present in 1 × 10²⁴ molecules of BCl₃.

Explanation:

In order to convert the given number of molecules of BCl₃ to grams, first we have to convert the molecules to moles.

It is known that 1 moles of any element has 6.022×10²³ molecules.

Then 1 molecule will have \frac{1}{6.022*10^{23} } moles.

So 1*10^{24} molecules = \frac{1*10^{24} }{6.022*10^{23} } =1.66 moles

Thus, 1.66 moles are included in BCl₃.

Then in order to convert it from moles to grams, we have to multiply it with the molecular mass of the compound.

As it is known as 1 mole contains molecular mass of the compound.

As the molecular mass of BCl₃ will be

Molecular mass of BCl_{3}= Mass of Boron + (3*Mass of chlorine)

Mass of boron is 10.811 g and the mass of chlorine is 35.453 g.

Molar mass of BCl₃ = 10.811+(3×35.453)=117.17 g.

grams of BCl_{3}=Molar mass of BCl_{3}*Number of moles

grams of BCl_{3}=117.17*1.66=194.5 g

So, 194.5 g of BCl₃ is present in 1 × 10²⁴ molecules of BCl₃.

3 0
4 years ago
What metalloid has commonly been used as an insecticide due<br> to its effectiveness as a poison.
Taya2010 [7]

Answer:

Arsenic.

Explanation:

Hello there!

In this case, since insecticides are substances that act as poisons to get rid of insects in order to prevent their presence and/or reproduction in houses, companies, crops and others, a substance that has been widely used is the metalloid arsenic due to its direct affection of the insect's body (movement, performance, cellular functions).

In addition, high levels of arsenic in food could cause arsenic poisoning in humans as well, that is why such practice must be properly performed and by using the correct security protocol.

Best regards!

5 0
3 years ago
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