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Katarina [22]
3 years ago
5

Explain why some fibres are called synthetic

Chemistry
1 answer:
Mashcka [7]3 years ago
7 0
There are some fibres that are prepared by man by using chemicals, these are called synthetic fibres these are made of small units that join together to form long chains
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Why pure hydrogen is not used in ballons ?​
wariber [46]

Answer:  Hydrogen that is not used in balloons because hydrogen burns very easily.

pls mark brainliest

8 0
2 years ago
(a) if a sample containing 2.00 ml of nitroglycerin is detonated, how many total moles of gas are produced? (b) if each mole of
gregori [183]
Detonation of nitroglycerin: 

4C_3H_5N_3O_9  ------\ \textgreater \  12CO_2+6N_2+O_2+H_2O

<span>Mass nitroglycerin = 2.00 mL x 1.592 g/mL = 3.184 g 
</span>
Moles = mass / molar mass = 3.184<span> g/ 227.0872 g/mol = 0.01402
</span>
the ratio between nitroglycerin and Carbon dioxide is 4 : 12 
So, moles CO2 = 0.01402 x 12 / 4 =0.0420

the ratio between nitroglycerin and N2 is 4 : 6 
moles N2 = 0.01402 x 6 / 4 =0.0841

<span>the ratio between nitroglycerin and O2 is 4 : 1 </span>
moles O2 = 0.01402 x 1 / 4 = 0.0035

<span>the ratio between nitroglycerin and water is 4 : 1 </span>
<span>in the same way moles water = 0.005258 </span>

total moles = 0.0420 + 0.0841 + 0.0035 + 0.005258 = 0.130758

0.130758<span> x 55 = 5.78 L </span>

Mass N2 = 0.0841 mol x 28.0134 g/mol = 2.3548 g


6 0
2 years ago
52. A proton is a subatomic particle that has a
kondaur [170]

Answer:

positive charge

Explanation:

Protons are positively charged

3 0
2 years ago
Why potasium more reactive than lithium and sodium
frez [133]
So potassium is more reactive than lithium because the outer electron of a potassium atom is further from its nucleus than the outer electron of a lithium atom. Hope this answers the question. Have a nice day. Feel free to ask more questions.
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3 years ago
How would you pick the right kind of fluid to use in your hydraulic lift?
love history [14]

Answer:you would pick the fluid by seeing what would work such as gas in a truck or car you need to know what would work best and the best power for the lift

Explanation:

3 0
2 years ago
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