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Ira Lisetskai [31]
4 years ago
13

Evaluate this statement: Substances are made of two or more types of elements.

Chemistry
1 answer:
wolverine [178]4 years ago
6 0

A MOLECULE IS MADE OF TWO OR MORE ELEMENTS CHEMICALLY COMBINED IS KNOWN AS A COMPUND.

A MOLECULE IS MADE OF TWO ATOMS IS JUST AN ELEMENT.

A MOLECULE MADE OF TWO OR MORE ELEMENTS IS KNOWN AS A COMPUND.

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In order for a solute to dissolve in a solvent, what must be true?
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The solute has to be hydrophilic, (water loving).
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What do potatoes, wood, and lobster shells have in common?
STatiana [176]
They are all biotic factors, meaning they were once alive or were alive. (an abiotic factor is something that has never lived.) hope this helped.
5 0
3 years ago
A buffer solution is prepared by adding NaC2H202
olganol [36]

Shift to reactants(left)

<h3>Further explanation </h3>

A buffer solution is a solution that can maintain a good pH value due to the addition of a little acid or a little base or dilution.

The buffer solution can be acidic or basic

Acid buffer solutions consist of weak acids and their salts.  

A buffer solution of NaC2H202    and HC2H2O2 (acetic acid) is included in the acid buffer

So :

a slight addition of acid (H⁺) will be balanced by the conjugate base

the addition of a small base (OH⁻) will be balanced by the weak acid

With the addition of acid (H +), the equilibrium will shift to the left, in the formation of CH3COOH. The added acid will be neutralized by the conjugate base component (CH3COO−).

7 0
3 years ago
The pH of a 0.25 M (aq) solution of hydrofluoric acid, HF, at 25C is 2.03. What is the value of Ka for HF? Pls show all mathemat
Snezhnost [94]

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4 0
3 years ago
A technician experimentally determined the boiling point of octane to be 124.1°C. The actual boiling point of octane is 125.7°C.
kramer

Percent error=(experimentally determined boiling point-actual boiling point)

                   =(124.1 - 125.7) = 1.6 °C

Percentage error is \frac{1.6\times 100}{125.7} = 1.27%

Quantity                   Number of significant figures

0.070020 meter                     5

10,800 meters                        5

0.010 square meter               2

5.00 cubic meters                  1

507 thumbtacks                     3

 (5.3 x 10⁴) + (1.3 x 10⁴) =6.6 x 10⁴

(7.2 x 10⁻⁴) ÷ (1.8 x 10³)=4 x 10⁻⁷

10⁴ x 10⁻³ x 10⁶=10⁷

(9.12 x 10⁻¹) - (4.7 x 10⁻²)=(9.12 x 10⁻²) - (4.7 x 10⁻²)

                                          =(91.2-4.7)  x 10⁻²

                                           =85.5 x 10⁻²

5 0
3 years ago
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