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Anastasy [175]
2 years ago
13

8. A student passes a magnet over 10 g of a powder. Four grams of the powder stick to the magnet, while 6 g do not. Which of the

se identifies the substance? *
element
compound
mixture
solution
Chemistry
2 answers:
vladimir1956 [14]2 years ago
7 0

Answer:

mixture

Explanation:

The properties of the components of substance are different. One component has magnetic properties, another does not. So, we have at least 2 individual substances that were mixed together. So, we have a mixture.

Ierofanga [76]2 years ago
4 0

Answer: Option (c) is the correct answer.

Explanation:

An element is defined as a substance which can never be broken down into simpler substances.

For example, sodium is a metal and it contains only atoms of sodium.

A compound is defined as a substance that contains two or more different elements that are chemically combined together in a fixed ratio by mass.

For example, KCl is a compound in which atoms are present in 1:1 ratio.

A mixture is defined as a substance in which two or more number of different substances are mixed together. Particles of a mixture never combine chemically to each other.

A solution is also known as a homogeneous mixture because in it the solute particles are evenly distributed.

So, when a student passes a magnet over 10 g of a powder. Four grams of the powder stick to the magnet, while 6 g do not then this means that particles were not chemically combined together and they are also not evenly distributed into the solution.

Thus, we can conclude that mixture identifies the substance.

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An aqueous solution that has a hydrogen ion concentration of 1.0 x 10^-8 mole per liter has a pH of
spin [16.1K]

Answer: 8, which is basic

Explanation: The hydrogen ion concentration is 1.0 x 10^-8 mole per liter. Using [H+] = 1.0 x 10 -(pH) the pH is 8. A pH above 7 is basic.

7 0
2 years ago
S
N76 [4]

Answer:

B

Explanation:

B

4 0
2 years ago
what is it called when a scientists personal opinion affects the way experimental results are reported?
Monica [59]

I believe the word that you are looking for is "subjective"

-to be influenced by personal opinion or feeling-

PLEASE RATE AS THE BRAINLIEST ANSWER! THANK YOU! :)

4 0
3 years ago
Read 2 more answers
This is my first question on Brainly, Can someone explain Molar mass to me? I am not very good with it..
suter [353]
Hey,
A mole is a unit of measure that helps us compare particles of any given substance and its mass. ... The molar mass, also known as molecular weight, is the sum of the total mass in grams of all the atoms that make up a mole of a particular molecule. The unit used to measure is grams per mole.
5 0
3 years ago
A wooden artifact from an ancient tomb contains 60% of the carbon-14 that is present in living trees. How long ago was the artif
noname [10]

Answer:

The age of the sample is 4224 years.

Explanation:

Let the age of the sample be t years old.

Initial mass percentage of carbon-14 in an artifact = 100%

Initial mass of carbon-14 in an artifact = [A_o]

Final mass percentage of carbon-14 in an artifact t years = 60%

Final mass of carbon-14 in an artifact = [A]=0.06[A_o]

Half life of the carbon-14 = t_{1/2}=5730 years

k=\frac{0.693}{t_{1/2}}

[A]=[A_o]\times e^{-kt}

[A]=[A_o]\times e^{-\frac{0.693}{t_{1/2}}\times t}

0.60[A_o]=[A_o]\times e^{-\frac{0.693}{5730 year}\times t}

Solving for t:

t = 4223.71 years ≈ 4224 years

The age of the sample is 4224 years.

8 0
3 years ago
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