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V125BC [204]
3 years ago
8

Is quartz(SiO2) a substance or mixture?

Chemistry
1 answer:
Illusion [34]3 years ago
8 0
Quartz is a substance because the material has uniform properties throughout and is held together via chemical bonds.
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Malonate is a competitive inhibitor of succinate dehydrogenase. If malonate is added to a mitochondrial preparation that is oxid
NARA [144]

Malonate is an aggressive inhibitor of succinate dehydrogenase. If malonate is added to a mitochondrial education this is oxidizing pyruvate as a substrate, it is lower in attention<u> </u><u>Fumarate</u><u>.</u>

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Succinate dehydrogenase is also known as mitochondrial complicated II, and inhibition of succinate dehydrogenase by means of dimethyl malonate has been said to suppress the production of pro-inflammatory cytokines.

Fumaric acid is an organic compound with the system HO₂CCH=CHCO₂H.  It has a fruit-like taste and has been used as a meal additive. . The salts and esters are referred to as fumarates. Fumarate also can consult with the C ₄H ₂O²⁻ ₄ ion.

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3 0
1 year ago
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Q1: Erosion and weathering are often confused. How is erosion different from weathering? Give an example of each.
stepan [7]

Explanation:

1.

Weathering is the physical disintegration and chemical decomposition of rocks to form sediments and soils whereas erosion is the movement of weathered materials from one area to the other.

Erosion moves weathered materials and it causes them to change position. For example loose chips of rocks broken down as the rock weakens through alternate wetting and drying in tropical regions will remain in-situ until the agents of erosion comes to carry them away. The breaking is weathering and the carrying is erosion.

Learn more:

Wind erosion brainly.com/question/2115729

2.

Examples of mechanical weathering:

  •   Frost action
  •   Pressure release

Examples of chemical weathering:

  • Oxidation
  • Carbonation

There are two types of weathering:

  • In mechanical weathering, a rock disintegrates into smaller chunks by the action of wind, water and glacier. For example in temperate and polar regions, water within rocks freezes. When water freezes it expands and causes tension within the rock. When temperature drops, water melts and the tension is relieved. This process causes a rock to crack. The crack will eventually become wider with time.
  • In chemical weathering, a rock decomposes by the action of chemicals formed in the rock. In karst regions where limestone forms, combination of rain water and carbon dioxide forms weak carbonic acid that reacts with calcite in limestone.

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6 0
3 years ago
15. transition metals has ____ valence electrons
Gemiola [76]

2 valence electrons

Explanation:

Most transition metals have 2 valence electrons. Valence electrons are the sum total of all the electrons in the highest energy level (principal quantum number n). Most transition metals have an electron configuration that is ns2(n−1)d , so those ns2 electrons are the valence electrons.

8 0
3 years ago
I really need help!!! I will give more points to people that actually help!
Andru [333]

Answer:

C8H18 2 114.22852  

O2 25 31.9988  

CO2 16 44.0095  

H2O 18 18.01528

Explanation:

6 0
3 years ago
What mineral is this? Egg-sized piece. Transparent pink color with glassy luster. Shows conchoidal fracture. The hardness is 7.
fgiga [73]

ruby

Explanation:

because it's ruby

8 0
3 years ago
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