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nikklg [1K]
2 years ago
6

WORTH 53 POINTS AND BRAINLIEST!!!

Chemistry
2 answers:
Natali5045456 [20]2 years ago
8 0
The answer would be D carbon dioxide
Nat2105 [25]2 years ago
3 0

Answer:

D.) Carbon Dioxide

Explanation:

Pure Substance is defined as an element or compound that cannot be separated by physical means. In this case, Carbon Dioxide is a molecule that cannot be separated without breaking a chemical bond.

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C. What is oxidized in the reaction? What is reduced? (2 points)
Rina8888 [55]

Answer:

Oxidation: a type of chemical reaction where one or more electrons are lost.

Oxidation State / Number: a number assigned to an atom describing its degree of oxidation, meaning how many electrons it has gained or lost.

Reduction: a type of chemical reaction where one or more electrons are gained.

Oxidation-Reduction Reaction: a chemical reaction where oxidation and reduction occurs simultaneously

Explanation:

Reduction always occurs at cathode

Oxidation always occurs in anode

These two process occurs in same way independent of nature of cell whether voltaic or electrolytic.

6 0
2 years ago
Darwin observed how farmers and breeders produced many kinds of farm animals and plants. These plants and animals had traits tha
NISA [10]

the answer is A......

it is supported by practical evidence and examples. this is the answer because he tried and tested many different ways to see what would happen so he is happy with the conclusion that what he tested is what he gets.

3 0
3 years ago
Read 2 more answers
Calculate the pressure of 2.50 Liters of a gas at 25.0oC if it has a volume of 4.50 Liters at
MariettaO [177]

Answer:

P_2 =0.51  atm

Explanation:

Given that:

Volume (V1) = 2.50 L

Temperature (T1) = 298 K

Volume (V2) = 4.50 L

at standard temperature and pressure;

Pressure (P1) = 1 atm

Temperature (T2) = 273 K

Pressure P2 = ??

Using combined gas law:

\dfrac{P_1V_1}{T_1} = \dfrac{P_2V_2}{T_2} \\ \\ \dfrac{1 *2.5}{298} = \dfrac{P_2*4.5}{273}

0.008389261745 \times 273 = 4.5P_2

P_2 =\dfrac{0.008389261745 \times 273 }{4.5}

P_2 =0.51 \ atm

4 0
2 years ago
Identify an element as a metal or a non-metal according to its position in the Periodic<br> Table
Anestetic [448]

Answer:

Metals on the left of the Periodic Table.

Non-Metals on the top-right, plus Hydrogen.

4 0
2 years ago
Atomic radius increases as you move down a group of elements.
raketka [301]
Yes, the atomic radius increases as you move down a group of elements.  this is true
going down leads to valence electrons that are further away from nucleus -> less electrostatic attraction -> less pull towards nuc. -> greater radius/volume taken
3 0
2 years ago
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