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Reptile [31]
3 years ago
6

Another real-world example of a change is rust. Rust is iron oxide (Fe2O3), which results when iron is exposed to oxygen in the

air. What are some indicators of rusting? Check all that apply. A) production of light B) color change C) formation of a solid D) formation of a gas

Chemistry
2 answers:
natita [175]3 years ago
8 0

Answer:

c

Explanation:

IrinaVladis [17]3 years ago
5 0

Answer:

c

Explanation:

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The electron affinity of an element is positive if energy is absorbed during the process of accepting an electron and negative i
julsineya [31]

Answer:

See explanation

Explanation:

Electron affinity is the energy released when an extra electron is added to a neutral gaseous atom. A negative value of electron affinity indicates that energy is given out and vice versa.

Metals have positive electron affinity since electrons rarely accept electrons, so;

Na(g)+ 1e^- → Na^-(g)      positive

Mg(g)+1e^- → Mg^-(g)      positive

For the last case; Br(g)+ 1e^- → Br^-(g), the electron affinity for the non-metals is negative. hence the answer

5 0
2 years ago
Explain the difference between mechanical weathering and chemical weathering​
Alchen [17]

Answer:

mechanical weathering breaks rocks into smaller forms without any change in their composition whereas chemical weathering breaks down rocks by forming new minerals .

or simply mechanical weathering is the physical breakdown of rocks while chemical weathering is the breakdown of rocks through chemical reactions .

5 0
3 years ago
Read 2 more answers
What is the key element fountain all carbohydrates lipids proteins and nucleus acid
just olya [345]
Carbon is found in all four.
6 0
3 years ago
A person's heartbeat is 66 beats per minute. If his/her heart beats 3.1e9 times in a lifetime, how long (in whole years) does th
BartSMP [9]
<span>88(60) 24(365) that should be the answer after you figure it out.</span>
5 0
3 years ago
U/d21/ms/quizzing/user/attempt/quiz_start_frame_auto.d2l?u=2332447&amp;isprv=&amp;dic=0&amp;q=2942919do
Masteriza [31]

Answer:

876 grams

Explanation:

Convert specific gravity to density, using water density 1.0 g/ml

d = e.g x 1.0 g/ml = 1.168 g/ml

d = m/v  (mass/volume)

m = dxv = 1.168 g/ml x 750 ml = 876 grams

4 0
3 years ago
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