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Romashka-Z-Leto [24]
3 years ago
7

Which substance can not be broken down by a chemical change?

Chemistry
2 answers:
notka56 [123]3 years ago
7 0

Answer:

Among the given substances, the one that cannot be broken down by a chemical change is arsenic.

Explanation:

Rawr

ra1l [238]3 years ago
6 0

Answer:

the substances that cannot be broken down by a chemical change is arsenic.

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What is one way to test whether an unknown solution is acidic or basic?
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Answer: There are several ways. The first that comes to mind is a pH meter. A pH electrode Is lowered into the solution, and (Assuming) the pH Meter has been properly calibrated, and the temperature of the solution is set to the calibration of the Meter, the pH can be read directly from an analogue scale or digital readout. Below 7 is acidic, 7 is Neutral, (like Pure Water), and over 7 is Alkaline, or Basic.

A useful, but less accurate method is the use of any number of “pH Indicator Solutions”, which are essentially a type of various colored dyes that change color within differing pH ranges. Usually, if the pH is unknown, a small amount of solution is removed from the container and tested separately - in a “well plate”, or similar method.

These types of dyes, or Indicator Solutions, can be dried upon strips of “pH indicator Paper”, which, depending upon the type can be very useful when carrying out more precisely arrived at pH tests like Titration.

Just to see if a solution is “Acid” or “Base”, Litmus paper is used; “a Red color shows Acidity, and a Blue color, a Base”; ergo, “An Acid Solution will turn Litmus Paper, Red”.

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3 years ago
The lab procedure you just studied involves
Svetllana [295]

Answer: c , v, c, c, v

Explanation:

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What is necssesary for a plant to exhibit phototropism
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Hey The cells on the plant that are farthest from the light have a chemical called auxin that reacts when phototropism occurs.
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The energy received by Earth from the sun is what type of energy
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3 0
3 years ago
Read 2 more answers
Two alcohols, isopropyl alcohol and propyl alcohol, have the same molecular formula, C3H8O. A solution of the two that is two-th
iris [78.8K]

Answer:

1.

Since both components of these solutions have the same molar mass, mole fractions would be the same as mass fractions.

0.110 atm = (2/3)(Pi) + (1/3)(Pn) [1]

0.089 atm = (1/3)(Pi) + (2/3)(Pn) [2]

2*[1] - [2]:

(2)(0.110) - 0.089 atm = Pi

Pi = 0.131 atm

2*[2] - [1]:

(2)(0.089) - 0.110 atm = Pn

Pn = 0.068 atm

2.

The hydroxyl (-OH) group on the end of a longer 1-propanol molecule makes it more polar than IPA. It follows that the intermolecular forces between 1-propanol are stronger than those of IPA and thus the vapor pressure of 1-propanol should be lower than IPA.

Explanation:

5 0
3 years ago
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