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Tanya [424]
3 years ago
12

Which of these is an example of a physical change? Question options: melting a substance breaking chemical bonds forming chemica

l bonds nuclear decay
Chemistry
2 answers:
bogdanovich [222]3 years ago
8 0
Breaking chemical bonds
kherson [118]3 years ago
4 0
Your answer is Breaking chemical bonds. Hope this helps
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An over-the-counter medicated foot powder contains camphor, eucalyptus oil, lemonoil, and zinc oxide. Only one of the ingredient
attashe74 [19]

Answer:

Zinc oxide is the antimicrobial in the medicated foot powder.

Explanation:

Zinc oxide (ZnO) is used to treat several skin conditions such as acne, dermatitis, eczema, etc because it has antibacterial and antifungal properties. This property of the ZnO depends on its size i.e., the smaller the size of ZnO, the stronger antimicrobial activity it has. So, the ZnO nanoparticles are more efficient.

The zinc oxide interacts with the sulfur atoms in microbial proteins and denatures them and destroys their function. This action completely inhibits microbial growth. The treatment with zinc oxide causes the reduced production of conidia in fungi, damages their hyphae and inhibits their ability to produce mycotoxins.

The compounds containing zinc such as ZnSO4, Zn(ClO4)2, etc also have antifungal and antimycotoxin properties that can cause changes in the fungi cell structure. Also, the free radicals formed on the surface of the ZnO nanoparticles can cause damage to the lipids in the bacterial cell membranes that can lead to the leakage and breakdown of the bacterial cell membranes.

5 0
3 years ago
Unknown # 41
Semmy [17]
Answer: Potassium Iodide, KI

Explanation:

Flame test colors:

Li+ = Crimson Red
Na+ = Bright Orange-Yellow
K+ = Lilac

Addition of nitric acid and silver nitrate (HNO3 and AgNO3),

Cl- = White precipitate
Br- = Creamy precipitate
I- = Yellow Precipitate

Hope this helps, brainliest would be appreciated :)
3 0
3 years ago
How does carbon cycle through the ocean, atmosphere, soil, and biosphere?
saw5 [17]
Carbon moves from one storage reservoir to another through a variety of mechanisms. For example, in the food chain, plants move carbon from the atmosphere into the biosphere through photosynthesis. Respiration, excretion, and decomposition release the carbon back into the atmosphere or soil, continuing the cycle.
make sure to paraphrase and give thanks:) good luck
3 0
3 years ago
What is the mass number of lithium isotope that consists of 3 protons, 4 neutron and 3 electrons
sweet-ann [11.9K]

Answer:

7. ok

please mark me brainlistb

6 0
3 years ago
all of the following are physical properties of a substance in the in the liquid state except. A) definite volume B) Not easily
NARA [144]
<span> indefinite volume </span>

<span>If the mass is definite and the density is definite, </span>
<span>then your volume is definite.</span>
3 0
3 years ago
Read 2 more answers
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