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lina2011 [118]
3 years ago
13

Anyone knows this? I don’t know this

Chemistry
1 answer:
jok3333 [9.3K]3 years ago
6 0

QUESTION :WHICH OF THE FOLLOWING IS AN EXAMPLE OF A CONTROLLED EXPERIMENT TO TEST THIS?

<em><u>ANSWER</u></em><em><u>:</u></em>

<em><u>D</u></em><em><u>.</u></em><em><u> </u></em><u>The</u><u> </u><u>temperatures</u><u> </u><u>of</u><u> </u><u>five</u><u> </u><u>breakers</u><u> </u><u>of</u><u> </u><u>250</u><u> </u><u>mL</u><u> </u><u>of</u><u> </u><u>water</u><u> </u><u>are</u><u> </u><u>varied</u><u>,</u><u> </u><u>and</u><u> </u><u>10</u><u> </u><u>g</u><u> </u><u>of</u><u> </u><u>sugar</u><u> </u><u>is</u><u> </u><u>added</u><u> </u><u>to</u><u> </u><u>each</u><u> </u><u>breaker</u><u>.</u><u> </u>

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I really need help with this question please help me.
oksano4ka [1.4K]
I would say A because it’s the only one that doesn’t conduct electricity. Ionic compounds conduct electricity, and covalent compounds do not.
3 0
3 years ago
If the same materials are used to build a voltaic cell and an electrolytic cell, how would the chemical reactions compare?
nadya68 [22]
In the electrolytic cell, depending on the polarity of the battery, either a more vigorous reaction (though the same as the voltaic cell) would occur, or the reverse would.
3 0
3 years ago
What impact did the Spanish have on the region of South America?
vichka [17]

Answer:

The Spaniards practically went to war with the native Americans in South America, such as the Inca. They also brought diseases to South America. Diseases like smallpox.

Explanation:

Then after effectively killing off most of the native American population the Spanish continued to use South America for resources and they enslaved most of what was left of the non-Spanish and mixed populations. Francisco Pizarro took a page from Cortes' book, capturing Atahualpa, Emperor of the Inca, in 1532 and Cortes was the conquistador who defeated the Aztec Empire in what is now modern day Mexico or Central America.

4 0
3 years ago
Which of the following best describes electrolytes
adoni [48]

Answer:

a, b

Explanation:

Electrolytes dissociate to make ions, because of it  they conduct electricity.

4 0
3 years ago
The modern periodic table is arranged in order of increasing. true or false
qaws [65]

Answer:

Increasing atomic number - True

Explanation:

The modern table is based on Mendeleev’s table, except the modern table arranges the elements by increasing atomic number instead of atomic mass.

The Atomic number is the number of protons in an atom, and this number is unique for each element. For example, Hydrogen has an atomic number of 1, Calcium has an atomic number of 20.

In the modern periodic table the elements are further arranged into:

- rows, called periods, in order of increasing atomic number. Elements in the same periods have the same number of shells.

- vertical columns, called groups, where the elements have similar properties. Elements in the same group has the same number of valency (outermost number of electrons)

4 0
3 years ago
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