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vlabodo [156]
3 years ago
11

HELP SCIENCE QUIZ I WILL MARK YOU BRAINLIEST

Chemistry
2 answers:
Goryan [66]3 years ago
7 0

Answer:

i want to say nuclues but again i also think that it is electron shells

Verizon [17]3 years ago
7 0

Answer:

Nucleus

Explanation:

The nucleus is a small, dense region at the center of the atom. It consists of positive protons and neutral neutrons, so it has an overall positive charge. The nucleus is just a tiny part of the atom, but it contains virtually all of the atom's mass.

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Given:
strojnjashka [21]

Answer:

≈ 708

Explanation

Here we have equation as:

                        4 Al     +    3 O₂    →    2 Al₂O₃

As we know:  

                       No of moles = Mass/ Molar mass

Here, Mass is 375 g and Molar mass is 27 gms, so no. of moles of Al will be:

                                            =375 g /27 g/mol

                                               =  13.889 mol

About mole ratio, we can see that for 4 moles of Al , 2 moles of Al2O3 are formed, so for 13.889 moles of Al, 13.889 mol ÷ 2 =6.944 moles of Al₂O₃ will be formed.

As we know:  

                            Mass= No of moles/Molar mass  

                      Mass of Al₂O₃ = 6.944 mol × 102  g/mol

                                           = 708.288 g

Hope it helps!

3 0
4 years ago
How many electrons would Magnesium with a -1 charge have?
katrin2010 [14]
Answer:


In this case, a neutral atom with 12 protons will have 12 electrons. On the periodic table, the atom with 12 protons is magnesium, which is in group 2 . Therefore, it will most likely lose 2 electrons to have 10 electrons, and form a noble gas configuration. So, magnesium becomes Mg2+ .
8 0
3 years ago
Pls help which law is that???
MAXImum [283]

Answer:

it is newtons third law

Explanation:

7 0
3 years ago
Read 2 more answers
What is used for hair that has been damaged by strong alkaline shampoos, chemicals or heat styling?
miss Akunina [59]

Moisturizing conditioners is used for hair that has been damaged by strong alkaline shampoos, chemicals or heat styling.

To enhance the feel, texture, look, and manageability of hair, hair conditioner is a cosmetic product for hair care. Its major objective is to lessen friction between hair strands so that brushing or combing may be done more easily and without risking scalp harm.

Electrostatic interactions allow the conditioner's components, particularly positively charged quaternary ammonium species like behentrimonium chloride or polymers referred to as Polyquaternium-XX, where XX is a random number, to adhere to the hair. Once linked, these substances have a variety of outcomes. Their extensive hydrocarbon backbone contributes to lubricating each hair follicle's surface, which lessens friction and makes combing easier.

Learn more about conditioners here:

brainly.com/question/12886100

#SPJ4

4 0
2 years ago
Which is the reason that ionic compounds are brittle?
lisabon 2012 [21]
Ionic bonds are the weakest bonds. 
7 0
3 years ago
Read 2 more answers
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