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Alexxx [7]
3 years ago
11

Why do scientists use different types of models to represent compounds

Chemistry
2 answers:
denis23 [38]3 years ago
6 0

Answer is: scientists use different types of model to show different characteristics (chemical properties) of compound.

For example, ball and stick model gives informations about bond lenght and space filling model gives information about space occupied by atoms.

In chemistry, the ball-and-stick model is a molecular model of a chemical substance which is to display both the three-dimensional position of the atoms and the bonds between them.   The atoms are represented by spheres, connected by rods which represent the bonds. Every ball represent one atom in one molecule and they have different colors for different atoms (for example, carbon is black, hydrogen is white, nitrogen is blue).

There also other models: skeletal models, polyhedral models, composite models, computer-based models.


shutvik [7]3 years ago
5 0
Because they are different they all show different  traits
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Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unw
Sauron [17]

Answer:

0.1472 mol/L is the concentration of the barium hydroxide solution.

Explanation:

2KHC_8H_4O_4+Ba(OH)_2\rightarrow Ba(KC_8H_4O_4)_2+2H_2O

Mass of potassium hydrogen phthalate = 2.050 g

Molar mass of potassium hydrogen phthalate = \frac{2.050 g}{204.2 g/mol}=0.01004 mol

According to reaction , 2 moles of potassium hydrogen phthalate reacts with 1 mole of barium hydroxide, then 0.01004 moles of potassium hydrogen phthalate will :

\frac{1}{2}\times 0.01004 mol=0.005020 mol of barium hydroxide

Moles of barium hydroxide = 0.005020 mol

Volume of the barium hydroxide solution = 34.10 mL = 0.03410 L

1 mL = 0.001 L

Molarity=\frac{Moles}{Volume(L)}

Molarity of the barium hydroxiude silution :

=\frac{0.005020 mol}{0.03410 L}=0.1472 mol/L

0.1472 mol/L is the concentration of the barium hydroxide solution.

4 0
2 years ago
Is H2CO3 an Arrhenius acid?
Korolek [52]
Carbonic acid.............................................
6 0
3 years ago
HELP! IM A STUDENT AND I NEED HELP!
hoa [83]

The fumaric acid reacts with water and forms fumarate anion and the hydronium ion which has acidic behavior. The reaction is reversible one due to the weakly  hydrolysis of fumaric acid.

3 0
3 years ago
How many milliliters of a 0.211 M HI solution are needed to reduce 24.0 mL of a 0.354 M KMnO4 solution according to the followin
Novay_Z [31]

Answer:

The answer to your question is 242 ml

Explanation:

Data

HI 0.211 M   Volume = x

KMnO₄ 0.354 M   Volume = 24 ml

Balanced Chemical reaction

     12HI + 2KMnO₄ + 2H₂SO₄ → 6I₂ + Mn₂SO₄ + K₂SO₄ + 8H₂O

Process

1.- Calculate the moles of KMnO₄  0.354 M in 24 ml

Molarity = moles / volume (L)

moles = Molarity x volume (L)

moles = 0.354 x 0.024

moles = 0.0085

2.- From the balanced chemical reaction we know that HI and KMnO₄ react in the proportion 12 to 2. Then,

              12 moles of HI --------------- 2 moles of KMnO₄

                x                     --------------- 0.0085 moles of KMnO₄

             x = (0.0085 x 12)/2

             x = 0.051 moles of HI

3.- Calculate the milliliters of HI 0.211 M

Molarity = moles/volume

Volume = moles/molarity

Volume = 0.051/0.211

Volume = 0.242 L or Volume = 242 ml

8 0
3 years ago
Which of the following happens to a molecule of an object when the object is heated? (1 point)
vfiekz [6]

Answer:

They get more energy, so they vibrate!

Explanation:

7 0
2 years ago
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