故选C。 C PFAS are found in nonstick pans, water-proof fabrics and food packaging. They're called forever chemicals because of their ability to stick around and not break down. Now, using a bit of heat and two relatively common compounds, researchers have degraded (降解) the chemical in ...
ai● Digestion is the process whereby large complex,aiiinsoluble food molecules are broken down I hydrolysedinto simpler, soluble and diffusible molecules that canbe absorbed into the body cells.●There are two types of digestion, chemical digestionwhere it involves breaking down chemical bonds within...
What is the term for a chemical reaction in which two molecules become covalently bonded to each other through the loss of a small molecule, usually water? What is the reaction called where bonds are broken in a molecule by the addition of water and bigg...
The basis of all chemical reactions is the breaking of bonds, or decomposition, and the creation of bonds, or synthesis. Decomposition requires energy because the chemical bonds are initially stable, and energy is required to break them apart. The molecules in the bond have a lower energy level...
What is the best way to know the difference between hydrogen bonds, and covalent bonds? What are the sub-atomic particles? How are they charged? How does chemical bonding occur? What are the various types of chemical bonding? How are they important for life? What are the chemic...
What is a nucleic acid consisting of the nucleotides adenine, guanine, cytosine, and uracil; usually single-stranded, and has functions in protein synthesis, gene regulation, and as the genome of some viruses? Which of the follo...
Household bleaches are a part of everyday life and are in nearly every American home, usually in more than one form. But what is bleach? Bleach is a very useful chemical both around the house and for large-scale use. You can use bleach to remove stains on clothing or to whiten your ...
The chemical structure of PLA Polylactic acid (PLA) is a biopolymer with a unique molecular structure that sets it apart from traditional petroleum-based plastics. Its backbone formula is (C3H4O2)n. At its core, PLA is composed of lactic acid monomers, which are derived from renewable plant ...
when that child died when that starts when the ceremony of when the circumstance when the creatures mo when the dawn comes t when the days are get when the dogs do find when the federal gove when the heat of a ro when the incident occ when the internet when the it kicks in when the...
Ultraviolet (UV) wavelengths are often used to break chemical bonds because they have higher energy photons compared to visible light. Many chemical bonds have dissociation energies that require the higher energy provided by UV light to be broken. UV light typically ranges from 10 to 4...