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2 years ago

What would be the definition of chemical indicators?

Chemistry

1 answer:

Gwar [14]2 years ago

5 0

Answer:

Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.

Explanation:

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A 29.7 g sample of iron ore is treated as follows. The iron in the sample is all converted by a series of chemical reactions to

Softa [21]

<u>Answer:</u> The mass of iron in the ore is 10.9 g

<u>Explanation:</u>

We are given:

Mass of iron (III) oxide = 15.6 g

We know that:

Molar mass of Iron (III) oxide = 159.69 g/mol

Molar mass of iron atom = 55.85 g/mol

As, all the iron in the ore is converted to iron (III) oxide. So, the mass of iron in iron (III) oxide will be equal to the mass of iron present in the ore.

To calculate the mass of iron in given mass of iron (III) oxide, we apply unitary method:

In 159.69 g of iron (III) oxide, mass of iron present is $(2\times 55.85)=111.7g$

So, in 15.6 g of iron (III) oxide, mass of iron present will be = $\frac{111.7g}{159.69g}\times 15.6g=10.9g$

Hence, the mass of iron in the ore is 10.9 g

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2 years ago

What is the final concentration (M) of a solution prepared by diluting 50.0 mL of a solution to a volume of

docker41 [41]

0.600
D) 0.600 is the final concentration of the solution of KCl.
V1 = 50.0 mL.

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2 years ago

What is chemistry n laboratory

grin007 [14]

a laboratory for research in chemistry. chem lab, chemistry lab. lab, laboratory, research lab, research laboratory, science lab, science laboratory - a workplace for the conduct of scientific research.

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2 years ago

Every spring has an equilibrium position. Which statements describe a spring at its equilibrium position? Check all that apply.

rjkz [21]

The statements describe a spring at its equilibrium position is the elastic potential energy is zero, the displacement of the spring is at a maximum and the net force acting on the spring is zero.

<h3>What is the equilibrium position?</h3>

A body is in equilibrium when the sum of all forces acting on it equals zero. According to Newton's First Law, when resulting from the laws that act on a body that remains in a state of restriction or in motion in its motion, it remains uniformly null.

In this case the only statements that match the definition of equilibrium position are:

The elastic potential energy is zero.
The displacement of the spring is at a maximum.
The net force acting on the spring is zero.

See more about equilibrium position at brainly.com/question/10374921

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1 year ago

1.505 times 10^23 Na atoms

dybincka [34]

5.75g

Explanation:

Given parameters:

Number of atoms = 1.505 x 10²³atoms

let us find the number of moles and mass of this atom.

Solution:

The mole is convenient unit for reporting measurements in chemistry. It allows us to make mathematical calculations:

one mole of substance contains 6.02 x 10²³atoms

Number of moles of Na given = $\frac{1.505 x 10^{23} }{6.02 x 10^{23} }$ = 0.25moles

Mass of Na atom given = number of moles x molar mass

Molar mass of Na= 23g/mole

Mass of Na = 0.25 x 23 = 5.75g

learn more:

Number of moles brainly.com/question/1841136

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8 0

2 years ago

What would be the definition of chemical indicators?​

What would be the definition of chemical indicators?