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Margaret [11]
2 years ago
15

Everything in group 2 on the periodic table are called

Chemistry
1 answer:
Ludmilka [50]2 years ago
3 0

Answer:

group two elements are called alkaline earth metals

Explanation:

Because their oxides form in the earth and are water soluble

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Identify the compound. Which of these is a compound?
Bond [772]
The answer has to be either CO2 or mg. But i am not sure which one 
7 0
3 years ago
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Suppose you have been given the task of distilling a mixture of hexane + toluene. Pure hexane has a refractive index of 1.375 an
miv72 [106K]

Explanation:

The given data is as follows.

         Refractive index of mixture = 1.456

        Refractive index of hexane = 1.375

        Refractive index of toulene = 1.497

Let mole fraction of hexane = x_{1}

and, mole fraction of toulene = x_{2}

Also,        x_{1} + x_{2} = 1

or,            x_{1} = 1 - x_{2}

Hence, calculate the mole fraction of hexane as follows.

        refractive index mixture= mole fraction hexane × ref index hexane + mole fraction toluene × ref index toluene.

              1.456 = (1 - x_{2}) \times 1.375 + x_{2} \times 1.497

               1.456 = 1.375 - 1.375x_{2} + 1.497x_{2}

               0.081 = 0.122x_{2}

                   x_{2} = \frac{0.081}{0.122}

                                = 0.66

Since,     x_{1} = 1 - x_{2}

                          = 1 - 0.66

                          = 0.34

Thus, we can conclude that mole fraction of hexane in your sample is 0.34.        

3 0
3 years ago
Describe in your own words the purpose of the balance scales and bar charts in the simulation.
Alex

Answer:

I hope this helps!!

Explanation:

The purpose is to physically show the process of the chemical reaction's balance.

4 0
3 years ago
Iron(II) sulfide has a molar mass of 87.91 g/mol. 50 grams of
dimaraw [331]

Answer:

true

Explanation:

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Dalton incorporated the law of conversation of mass into his atomic theory by asserting that?
Nat2105 [25]

Answer;

A. atoms are indivisible.

Dalton incorporated the law of conversation of mass into his atomic theory by asserting that atoms are indivisible.

Explanation;

Dalton's atomic theory proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical, different elements had atoms of differing size and mass.

-According to Dalton; Elements are made of extremely small particles called atoms. Atoms of a given element are identical in size, mass and other properties; atoms of different elements differ in size, mass and other properties. Atoms cannot be subdivided, created or destroyed.

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