You find that the unknown powder contains the illegal drug cocaine. If someone where to ask you to determine the purity of the substance, what would they mean? Why is purity important in crime investigations?

Answers

Answer 1

Answer: The substance is not composed entirely of cocaine, it is mixed with other materials. The purity refers to what percentage of the powder is cocaine, and what percentage is other materials.
Purity can be important in crime investigations to find out the samples value, and to pair it with previously found samples of equal purity to deduce that they came from the same source.

Answer 2

Answer:

Answer:

If some would ask me to determine the purity of an unknown powder that contains illegal drugs like cocaine, they would probably be wanting to remove other substances that are added like baking soda, and the reason this is so important is that sometimes the ingredients they get to mix with have an effect on the test and may miss lid the results.

Explanation:

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At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products? a) The product is doubled. b) The product is half the mass of the reactants. c) The mass is the same. d) The mass changes depending on the reaction.

Rhea has a balloon that contains 0.5 mole of helium. how many particles of helium are in the balloon?

Answers

Answer:

$\boxed{3 * 10^(23)}$

Explanation:

1 mol of helium contains 6.022 × 10²³ atoms

$\text{Atoms of He} =\text{0.5 mol He} * \frac{ 6.022 * 10^(23) \text{ atoms He}}{\text{1 mol He}}= 3 * 10^(23) \text{ atoms He}$

The balloon contains $\boxed{3 * 10^(23) \text{ atoms of He}}$ .

69.253 helium particles are in the balloon.

What is helium particles?

Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with either one or two neutrons, depending on the isotope, held together by the strong force. Unlike for hydrogen, a closed-form solution to the Schrodinger equation for the helium atom has not been found.

A helium atom is an atom of the chemical element helium. Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with either one or two neutrons, depending on the isotope, held together by the strong force. Unlike for hydrogen, a closed-form solution.

Helium is the element which you can find on the upper right side of the periodic table with atomic number 2. It comes first amongst the family of the noble gases. Helium falls under inert gas since its outermost electron orbital is full with two electrons.

The answer is 69.253.

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The breakdown of glucose is linked to cellular work by a chemical driveshaft known as

Answers

Answer:

ATP

Explanation:

I have to draw a diagram of the ingredient's particles in a pancake. E.g milk eggs etc

the diagram must include what the particles are like before and after being cooked please help it is due in tomoz

Answers

when pancakes are being cooked they get stuck to each other piece, in the pancake an get more tangled up

What mass of oxygen gas contains the samenumber of moles as 56g of sulphur?
(Relative atomic mass: S=32,0=16)
(A) 0.56 g
B) 5.6 g
(C) 56 g
C) 560g

Answers

The mass of oxygen gas contains the same number of moles as 56g of sulphur is 56g

Calculation,

Number of moles of sulphur = given mass/ molar mass of sulphur

Number of moles of sulphur = 56/ 32 moles

Number of moles of sulphur = 1.75 moles

According to question,

Number of moles of sulphur = Number of moles of oxygen(O2)

So, Let mass of oxygen be X.

Number of moles of oxygen = X/16×2 = 1.75 moles

Mass of oxygen (X) = 1.75×16×2 grams

Mass of oxygen (X) = 56 grams

What is moles ?

The 6.022×1023 of chemical species like an electrons, molecules atoms, ions etc is called moles

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Answer:

C. 56 g

Explanation:

56 g S (1 mol S/ 32 g) = 1.75 mol S

1.75 mol O2 (32 g/ 1 mol O) = 56 g O2

When a reaction occurs between atoms with ground state electron configuration 1s2 2s1 and 1s2 2s2 2p5 the predominant type of bond formed is

Answers

Answer:

Ionic

Explanation:

Step 1: Define

1s²2s¹ is Lithium (Li)

1s²2s²2p⁵ is Chlorine (Cl)

Step 2: RxN

2Li (s) + Cl₂ (g) → 2LiCl (s)

Step 3: Identify

LiCl is a metal and a non-metal bonded together. Therefore, it will be an ionic bond. The Lithium would transfer it's electron to Chlorine (since it wants a full outer shell 0f 8 and it currently as 7) and form a salt.

Explain why benzoic acid is able to be separated from acetanilide using sodium bicarbonate.

Answers

Benzoic acid is not soluble in water, so the addition of sod

Final answer:

Benzoic acid is separated from acetanilide using sodium bicarbonate by converting it into sodium benzoate, which is soluble in water. Acetanilide remains unaffected in the mixture.

Explanation:

In the process of separating benzoic acid from acetanilide using sodium bicarbonate, the basic nature of sodium bicarbonate reacts with the acidic benzoic acid, leading to the formation of sodium benzoate. The sodium benzoate is highly soluble in water, allowing it to be easily separated from the acetanilide, which remains insoluble. On the other hand, acetanilide is not affected by the sodium bicarbonate and remains unaffected in the mixture.

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