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4 years ago

Drug testing if a person do not use drugs how cam he test positive on hair drug test

Chemistry

1 answer:

Hitman42 [59]4 years ago

7 0

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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In a chemical reaction, [_____] are the substances present after the reaction.

worty [1.4K]

Answer:

Products

Explanation:

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3 years ago

2.6<br> +<br> 3.78<br> How do you solve this problem

Zolol [24]

Answer:

6.38

Explanation:

line up the decimals

it helps to add another 0 to 2.6 so that you can align them better

2.60

+ 3.78

= 6.38

8 + 0 = 8

6 + 7 = 13; write 3 and carry the one over above the 2 in 2.60

2 + 3 + 1 = 6

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3 years ago

Vanillin, c8h8o3 (m = 152 g/mol), is the molecule responsible for the vanilla flavor in food. how many oxygen atoms are present

Flauer [41]

Molecular weight of vanillin = 152 g/mol

Futher molecular formula of vanillin is C8H8O3

Atomic weight of oxygen = 16 g/mol

Thus, 152 g of vanillin contains 16 g of oxygen
∴ 0.045 g (45 mg) of vanillin contains $\frac{16X0.045}{152}$ = 0.00473 g

Also, number of moles of vanillin in 0.045 g sample = $\frac{weight}{molecular.weight} = \frac{0.045}{152} = 2.96X10^{-4}$
Now, 1 mole = 6.023 X 10^23 molecules
∴ 2.96 X 10^-4 mole = 1.78 X 10^20 molecules

From molecular formula, it can be seen that 1 molecule of vanallin contain 3 atoms of oxygen
∴1.78 X 10^20 molecules contain 3 X 1.78 X 10^20 = 5.34 X 10^20 oxygen atoms

3 0

4 years ago

What is the molality of a solution made by dissolving 0.0816 moles of

Paul [167]

Answer:

m = 0.544 moles/kg

Explanation:

To do this, we need to use the expression for molality of a solution which is:

m = n / kg water

Where:

n: moles of solute

m: molality of solution

In this case, we have the moles of the solute, which is the C6H12O6 and the grams of water, and these grams would have to be turn into kg. Let's do this first:

kg of water = 150 g * 1 kg / 1000 g = 0.150 kg of water.

Now, replacing in the above expression of molality, we can calculate the molality of the solution:

m = 0.0816 / 0.150

<h2>m = 0.544 moles/kg</h2>

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3 years ago

The H-O bonds in H20?

Oksi-84 [34.3K]

Answer:

Each water molecule can form two hydrogen bonds involving their hydrogen atoms plus two further hydrogen bonds utilizing the hydrogen atoms attached to neighboring water molecules.

Explanation:

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3 years ago