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dezoksy [38]
3 years ago
15

Help me for brainlest pleaes

Chemistry
1 answer:
Tresset [83]3 years ago
6 0
First option.

The male tails are more attractive because of their long feathers , meanwhile the female tails are shorter than expected!
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The same amount of energy is required to remove each electron sequentially from an atom.
77julia77 [94]

Ionization energy, also called ionization potential, in chemistry, the amount of energy required to remove an electron from an isolated atom or molecule.

6 0
4 years ago
Bromine (Br2) is produced by reacting sea water with chlorine (Cl2) by the following reaction. What mass of Cl2 (in kg) is neede
maxonik [38]
Haha ironically I had this problem not too long ago, I hope by this we will both be better students. Everyone just needs practice. Ok stop to pep talk and lets go. I'll try to go step by step. 

<span>So basically since this is a balanced equation, the ratios of mols of the elements are equal, atom wise. </span>

<span>So you notice they give you Br2 is 1.0 kg (1000g) and that means there are 2 mols of Br2. And its asking for Cl2, (on the left) it also has 2 mols. </span>
<span>Then you can start from 1000g Br2 and multiply with 2 mol Br2 and 159.8g Br2 on the bottom. The 159 8 is the actual grams per mol. Then when you write this down, continue multipying with the next fraction. </span>

<span>Since you know the molar mass of Cl2 is 70.4 and you know theres 2 mols, you can say that 2 mols of Br2 = 2 mols of Cl2 so you should be able to multiple 2 mol Br2 / 159.8g Br2 with 70.4 g Cl2 / 2 mol Cl2. Bam the mols cancel out and you have the grams for Cl2. Multiple all that out and you should get 443g Cl2. Notice how the beginning question gives 2 significant figures, so technically 440g Cl2 is more of an exact number.</span>
5 0
3 years ago
What holds everything in place in the universe?
tresset_1 [31]

Answer:

Gravity

Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.

Explanation:

hope this helps

8 0
3 years ago
Read 2 more answers
Which subatomic particle is used to identify an element and is unique to that element?
Yuki888 [10]

Protons because each element has a different number. Example, Oxygen has 8, Nitrogen has 7, Carbon has 6, etc.

3 0
4 years ago
To form a hydrogen bond, what must the non-hydrogen atom ( N , O , or F ) involved in the bond possess?
kirza4 [7]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
Below are the choices:

A.) an unpaired electron, 
<span>B.) a nonbonding electron pair, </span>
<span>C.) a bonding electron pair, </span>
<span>D.) a high value of electronegativity
</span>

The correct answer is B.) a nonbonding electron pair, 
3 0
4 years ago
Read 2 more answers
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