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3 years ago

Which mineral property is the least reliable for identifying a mineral?

Chemistry

2 answers:

earnstyle [38]3 years ago

8 0

The answer is color as the least reliable

PIT_PIT [208]3 years ago

5 0

Answer:

While color has been the most evident of mineral properties,for identification it is the least credible. It is because the color of mineral in its crystal structure can be affected by minor chemical impurities.

Explanation:

Different properties in mineral are in seven numbers generally used to identify the different minerals namely: color, luster, hardness, streak, cleavage, fracture, and crystal form.

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Dolomite is a carbonate of magnesium and calcium. Analysis shows that 7.81 g of dolomite contains 1.70 grams of Ca. Fluorite is

andrew11 [14]

Answer:

The richer source of calcium is fluorite.

Explanation:

Percentage of element in compound :

$=\frac{\text{mass of element}}{\text{Mass of compound}}\times 100$

1. Dolomite is a carbonate of magnesium and calcium:

Given mass of dolomite = 7.81 g

Mass of calcium present in given mass of dolomite = 1.70 g

Percentage of calcium in Dolomite:

$=\frac{1.70 g}{7.81 g}\times 100=21.77\%$

2. Fluorite is a mineral of calcium and fluorine:

Given mass of fluorite = 2.76 g

Mass of fluorine present in given mass of fluorite = 1.34 g

Percentage of fluorine in fluorite :

$=\frac{1.34 g}{2.76 g}\times 100=48.55\%$

Percentage of calcium in fluorite = 100% - 48.55 % = 51.45%

Percentage of calcium in fluorite > Percentage of calcium in Dolomite

51.455 > 21.77%

So, the richer source of calcium is fluorite.

7 0

3 years ago

How many of the following are true concerning balanced chemical equations? I. The number of molecules is conserved. II. The coef

ZanzabumX [31]

Answer: I. The number of molecules is conserved.

III. Atoms are neither created nor destroyed

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken.

In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.

For example: $2Na+2H_2O\rightarrow 2NaOH+H_2$

Thus in the reactants, there are 4 atoms of hydrogen , 2 atoms of oxygen and 2 atoms of sodium.Thus there will be 4 atoms of hydrogen, 2 atoms of oxygen and 2 atoms of sodium in the product as well.

5 0

4 years ago

Which properties does uranium-238 have?

podryga [215]

The main properties of uranium-238 are as follows,

The uranium-238 have orthorhombic crystal structure.
The physical state of uranium-238 is solid.
The uranium-238 have acid base properties.
The uranium-238 have hard and silver white metal.
The natural abundance of uranium-238 is 99%

The Atomic mass and atomic weight of uranium-238

The atomic number of uranium-238 is 92
The atomic weight of uranium-238 is 238.02

learn about uranium-238

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5 0

2 years ago

The form of EMR that has less energy per photon than microwaves is ____?

Gala2k [10]

Answer: radio wave frequencies have longer wavelengths and smaller

Energies per photon

4 0

3 years ago

How long will it take for half of Bismuth-214 to decay to lead? (Refer to the Uranium-238 decay chain series.)

zhenek [66]

Answer:

Answer is: 20 min.Bismuth 214 decay mode to lead is beta minus decay and alpha decay.Beta decay is radioactive decay in which a beta ray and a neutrino are emitted from an atomic nucleus.

There are two types of beta decay: beta minus and beta plus. In beta minus decay, neutron is converted to a proton and an electron and an electron.Alpha decay is radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and transforms into an atom with an atomic number that is reduced by two and mass number that is reduced by four.

Explanation:

7 0

4 years ago