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sergejj [24]
2 years ago
8

Science please help me!!!!

Chemistry
1 answer:
balu736 [363]2 years ago
7 0
1)Atoms are the basic units of matter and the defining structure of elements. Atoms are made up of threeparticles<span>: </span>protons<span>, neutrons and electrons. </span>Protons<span> and neutrons are heavier than electrons and reside in the center of the atom, which is called the </span>nucleus<span>.

</span>
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I am in desperate need of help will give 40 points to whoever helps me!!!!! I have a quiz tomorrow but I have no idea how to do
serious [3.7K]
All of the questions here are pertaining to the colligative properties of a solution and the preparation of solutions. Maybe, it would be best if you understand the equations to be used in order to answer these questions.<span>
Freezing point depression or Boiling point elevation:

</span><span>ΔT = -K (m) (i)

</span>ΔT is the change in the freezing point or the boiling point not the freezing point/boiling point. Therefore, it should be added to the original value of the property of the solvent. 
<span>
K is a constant called the molal freezing point depression constant and for the boiling point is the boiling point elevation constant. It is a property of the solvent. 
</span><span>
m is the concentration of the solute in the solvent in terms of molality or kg solute/kg solvent. 
</span><span>
i is the vant hoff factor which will represent the number of ions which the solute dissociates when in solution.</span>
5 0
3 years ago
Write a complete set of quantum numbers for the fifth electron added to a hydrogen ion (i.e., the fifth electron in any electron
ankoles [38]
N=
l=
m(l)=
m(s)=

start with H^+ (no electrons) , then adding 5 electrons will be  1s2 2s2 2p1
so for the 5th electron 
n = 2
l = 1
ml = -1
ms = 1/2

5 0
3 years ago
Read 2 more answers
A dunk tank hold 30,533 moles of water? How many grams of water are in the tank?
liubo4ka [24]

The mass of water in the tank, given the data from the question is 549594 g

<h3> Description of mole </h3>

The mole of a substance is related to it's mass and molar mass according to the following equation:

Mole = mass / molar mass

<h3>How to determine the mass of water in the tank</h3>

From the question given above, the following data were obtained:

  • Mole of water = 30533 moles
  • Molar mass of water = 18 g/mol
  • Mass of water = ?

The mass of the water can be obtained as follow:

Mass = mole × molar mass

Mass of water = 30533 × 18

Mass of water = 549594 g

Learn more about mole:

brainly.com/question/13314627

#SPJ1

3 0
1 year ago
What is the pH of a 6.7 x 10^−5 M H+ solution?
lyudmila [28]

Answer:

pH = 4.17

Explanation:

According to the molar concentration you stated, pH of the solution is: 4.17

Remember that pH = - log [H⁺]

and [H⁺] = 10^-pH

When:

pH > 7 →  Basic solution

pH = 7 → Neutral solution

pH < 7 → Acid solution

3 0
3 years ago
Read 2 more answers
What are the three challenges of a cell?
Zolol [24]
<span>The cell must exchange materials with the environment across the surface membrane. An increase in size will result in a relatively greater increase in volume and mass than in surface area, so that the cell will lose effective exchange capacity. 

</span>
3 0
3 years ago
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