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Gemiola [76]
3 years ago
14

Name two types of silk

Chemistry
1 answer:
arsen [322]3 years ago
5 0

Answer:

Tussar silk

Charmeuse

Explanation:

Hope this helps! :)

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HELP PLEASE ANSWER PLEASE ITS URGENT!!<br><br> -unnecessary comments will be reported.
Verizon [17]

Answer:

19. 1, 2, 3, 4, 5, 6, 7, 8

20. Li=1+, Be=2+, B=3+, C=4+

21. N=3-, O=2-, F=1-

Explanation:

8 0
3 years ago
Calculate the mass of 4.55x1024 molecules of sucrose
maxonik [38]

Answer:

2584 g

Explanation:

The molecular formula for sucrose is C₁₂H₂₂O₁₁, which means its molar mass is 342.3 g/mol.

First we<u> convert molecules into moles</u> by using <em>Avogadro's number</em>:

  • 4.55x10²⁴ molecules ÷ 6.023x10²³ mol/molecules = 7.55 mol

Now we <u>convert moles of sucrose into grams</u>, using its<em> molar mass</em>:

  • 7.55 mol * 342.3 g/mol = 2584 g
7 0
3 years ago
Look up and compare the normal boiling points and normal melting points of H2O and H2S. Based on these physical properties, whic
NeTakaya

Explanation:

Both melting and boiling point of water are much higher that that of H2S.

The MP and BP of water are 0°C and 100°C respectively whereas the MP and BP of H2S are -82°C and -60°C respectively.

Clearly, the intermolecular forces in H2O are much stronger than in H2S because, H2O has hydrogen bonding in it, which is both inter and intra. Whereas H2S has only weak van der waal force between their molecules. This is why boiling and melting points of H2O is more than that of H2S.

Hydrogen bonding is a particular type of dipole-dipole association which occurs between atoms of hydrogen bound to strongly electronegative atoms that are either fluorine, oxygen or nitrogen.

The hydrogen atom's partially positive side is drawn to the partially negative end of these atoms found in some other molecule. It is a strong binding mechanism between the molecules.

7 0
3 years ago
An atomic physicist determines that an atom is composed of 8 positively charged particles and has a mass of 15 amu. Which is the
Alenkinab [10]

Answer: The atom has 7 neutrons and 8 protons.

Explanation: On Edhenuity!!!!!!!!!

8 0
3 years ago
Read 2 more answers
2. A substance that is solid, has a shiny orange color, conducts electricity well, and melts
geniusboy [140]

Answer: Aluminium

Explanation:

The metals are solid substances, they have shiny luster, they conduct electricity and have high melting point. The aluminium is a kind of metal that have a solid surface, it has a shiny luster, the surface of metal appears to be polished. It conducts electricity and can be used in electrical cords, connections, and devices. It has a high melting point.  

4 0
3 years ago
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