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Hoochie [10]
3 years ago
8

Please

Chemistry
2 answers:
Crazy boy [7]3 years ago
8 0

Answer:

2

Explanation:

2

Semmy [17]3 years ago
7 0
1. Littering can be a short term event. It’s impact on the organism is it could swallow the trash, or get stuck on it.
2. Pollution can be a long term event. It’s impact on an organism is it can damage/ reck homes, and it’s a poison. It should not be digested otherwise it could lead to health problems
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What is the number of molecules of c2h5oh in a 3m solution that contains 4.00kg h2o?
Veronika [31]
 The number  of C2H5OH  in a 3 m solution that contain 4.00kg H2O is calculate as below

M = moles of the solute/Kg  of water

that is 3M = moles of solute/ 4 Kg
multiply  both side by  4

moles of the  solute  is therefore = 12  moles

by use of Avogadro law constant

1 mole =6.02 x10^23  molecules

what  about 12 moles

=12 moles/1 moles  x 6.02 x10^23 = 7.224 x10^24 molecules
3 0
3 years ago
Choose the aqueous solution that has the highest boiling point. These are all solutions of nonvolatile solutes and you should as
UNO [17]

Answer: 0.100 m K_2SO_4

Explanation:

Elevation in boiling point is given by:

\Delta T_b=i\times K_b\times m

\Delta T_b=T_b-T_b^0 = Elevation in boiling point

i= vant hoff factor

K_b = boiling point constant

m= molality

1. For 0.100 m K_2SO_{4}

K_2SO_4\rightarrow 2K^{+}+SO_4^{2-}  

, i= 3 as it is a electrolyte and dissociate to give 3 ions. and concentration of ions will be 3\times 0.100=0.300

2. For 0.100 m LiNO_3

LiNO_3\rightarrow Li^{+}+NO_3^{-}  

, i= 2 as it is a electrolyte and dissociate to give 2 ions, concentration of ions will be 2\times 0.100=0.200

3.  For 0.200 m C_2H_8O_3

, i= 1 as it is a non electrolyte and does not dissociate, concentration of ions will be 1\times 0.200=0.200

4. For 0.060 m Na_3PO_4

Na_3PO_4\rightarrow 3Na^{+}+PO_4^{3-}  

, i= 4 as it is a electrolyte and dissociate to give 4 ions. and concentration of ions will be 4\times 0.060=0.24m

Thus as concentration of solute is highest for K_2SO_4 , the elevation in boiling point is highest and thus has the highest boiling point.

3 0
3 years ago
ENT
Vesna [10]

Answer:

law of independent assortment

7 0
3 years ago
Which of the following would you expect to happen to a sample of water with the salt potassium iodide (KI) added to it?
Alinara [238K]

The correct answer is A: Vapor pressure lowering.

Certain properties in chemistry are called colligative properties. These colligative properties depends on the amount of solute present.

Examples of colligative properties include;

  • Vapor pressure lowering
  • Freezing point depression
  • Boiling point elevation
  • Osmotic pressure

When a solute is introduced into water, the vapour pressure of water is lowered.

Hence, when KI is added to a sample of water, vapor pressure lowering occurs.

brainly.com/question/10323760

6 0
3 years ago
Read 2 more answers
Write the correctly balanced equation for the complete neutralization of h3po4 with ca(oh)2.
Leokris [45]
I hope my calculation is correct :P

6 0
3 years ago
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