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algol13
3 years ago
7

What is the best way to package and preserve a questioned document?

Chemistry
2 answers:
iren2701 [21]3 years ago
7 0
Plastic sheet protected
Zanzabum3 years ago
5 0
In a plastic sheet protector
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The molar mass of SO3 is grams. in significant figures
Vikentia [17]

Answer:

80.066 g/mol

Explanation:

I looked it up

6 0
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Given the following reaction: 3CuCl2(aq) 2Na3PO4(aq) --> Cu3(PO4)2(s) 6NaCl(aq) MM (g/mol) 134.45 163.94 380.58 58.44 If 285
nata0808 [166]

Answer:

227.78g of the precipitate are produced

Explanation:

Based on the reaction, 3 moles of CuCl2 produce 1 mole of Cu3(PO4)2 (The precipitate).

To solve this question we need to find the moles of CuCl2 added. With these moles and the reactio we can find the moles of Cu3(PO4)2 and its mass as follows:

<em>Moles CuCl2:</em>

285mL = 0.285L * (6.3mol / L) = 1.7955 moles CuCl2

<em>Moles Cu3(PO4)2:</em>

1.7955 moles CuCl2 * (1mol Cu3(PO4)2 / 3mol CuCl2) = 0.5985 moles Cu3(PO4)2

<em>Mass Cu3(PO4)2 -380.58g/mol-</em>

0.5985 moles Cu3(PO4)2 * (380.58g/mol) =

227.78g of the precipitate are produced

7 0
3 years ago
What kind of bond occurs between two<br> elements sharing three pairs of electrons?
Zigmanuir [339]
Covalent bond i believe
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What is heat
Nimfa-mama [501]

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energy that freely moves from one place to another. It is responsible for vibration of particles of matter

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Drug testing if a person do not use drugs how cam he test positive on hair drug test
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For example, certain medications may influence the results of the test.

Drug test can show the presence of illicit or prescription drugs on hair samples, although the person has not used these drugs.

Some of false positive drug use is because of this medications: antihistamines, decongestants, antibiotics, antidepressants, analgesics and antipsychotics.

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