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zvonat [6]
2 years ago
6

12. Describe the results of a chemical change. List four indicators of chemical change.

Chemistry
1 answer:
marshall27 [118]2 years ago
8 0

Answer:

1. Color Change

2. Change in temperature

3. Noticiable Odor

4. Formation of bubbles

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Answer:

sub for NA-

Explanation:

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3 years ago
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Draw the structural formula for dipeptide Pro-phe
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Answer:

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Explanation:

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2 years ago
Even though we are well into the course Dumbledore notices some of the students are still having trouble with significant figure
Sphinxa [80]

Answer:

B) 2

Explanation:

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

The rule apply for the multiplication and division is :

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

The rule apply for the addition and subtraction is :

The least precise number present after the decimal point determines the number of significant figures in the answer.

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5 0
3 years ago
Enter the atomic symbol, including mass number and atomic number, for iodine-130.
WINSTONCH [101]

<u>Answer:</u> The atomic symbol of the given element is _{53}^{130}\textrm{I}

<u>Explanation:</u>

The general isotopic representation of an element is given as:  _Z^A\textrm{X}

where,

Z represents the atomic number of the element

A represents the mass number of the element

X represents the symbol of an element

For the given isotope: 130-iodine

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6 0
3 years ago
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Makovka662 [10]

Answer:

K = 0.5

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Based on the reaction:

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K = P PCl₅ / P PCl₃ * P Cl₂

<em>Where P represent the pressure at the equilibrium for each one of the gases involved in the equilibrium.</em>

<em />

As:

P PCl₅ = 1.0atm

P PCl₃ = 1.0atm

P Cl₂ = 2.0atm

K = 1.0atm / 1.0atm * 2.0atm

<h3>K = 0.5</h3>
7 0
2 years ago
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