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professor190 [17]
4 years ago
6

How are objects in the universe held together by

Chemistry
1 answer:
Trava [24]4 years ago
3 0

Answer:

Objects are held together and remain there in the universe by powerful gravity.

Explanation:

Without gravity humans would not be able to walk on earth. We would all lose the gravitational pull and start floating.

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A sample of pure oxalic acid (H2C2O4.2H2O) weighs 0.2000 g and requires 30.12 ml of KOH solution for
ValentinkaMS [17]

 The molarity  of KOH  is  0.1055 M

 <u><em> calculation</em></u>

Step  1: write  the  equation  for reaction between H₂C₂O₄.2H₂O  and KOH

H₂C₂O₄.2H₂O  + 2 KOH   →    K₂C₂O₄ +4 H₂O

step 2: find the moles  of H₂C₂O₄.2H₂O

moles = mass÷ molar  mass

from  periodic  table the  molar mass H₂C₂O₄.2H₂O= (1 x2) +(12 x2) +(16 x4)  + 2(18)=126 g/mol

 = 0.2000 g ÷ 126 g/mol =0.00159  moles


step 3: use the  mole  ratio  to  calculate the moles of KOH

H₂C₂O₄.2H₂O : KOH  is 1:2

therefore the  moles of KOH  =0.00159 x 2 = 0.00318  moles

step 4: find molarity of KOH

molarity = moles/volume in liters

volume in liters = 30.12/1000=0.03012 L

molarity  is therefore = 0.00318/0.03012 =0.1055 M

5 0
4 years ago
Which soil particle is the smallest, drains water slowly, and holds too much water?
dsp73

Answer:

Clay

Explanation:

Since Clay has a very small particle size it compacts or has a high surface area which slows the path of water, holding it for longer periods compared to other soil components.

5 0
2 years ago
Atomic Structure and Theory [6A.S]:Question 6
-Dominant- [34]

We need to find mass number

\\ \sf\longmapsto Mass\:Number=No\:of\:protons+No\:of\:Neutrons

\\ \sf\longmapsto Mass\:Number=19+21=40

Your answer is 40u

3 0
3 years ago
Read 2 more answers
The atomic mass of an element most nearly reflects the elements total number of
klemol [59]

Answer:

it's a

Explanation:

<h3> the atomic mass is the number of protons and neutrons in an element added together</h3>

3 0
4 years ago
Read 2 more answers
A chemist is using a solution of hno3 that has a ph of 3.75. what is [h ] for the solution?
NemiM [27]

\text{pH} = -\log[H^{+}]\\\\\implies \log[H^{+}] = -\text{pH}\\\\\implies [H^{+}] = 10^{-\text{pH}}}\\\\\implies [H^{+}] =10^{-3.75}=0.00017~M

5 0
2 years ago
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