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3 years ago

Color is not very helpful in mineral identification because _____.

Chemistry

2 answers:

zhannawk [14.2K]3 years ago

8 0

Some minerals tend to look alike.

fredd [130]3 years ago

7 0

Answer:

The answer is: Although color is useful as a means of identification, it can sometimes vary depending on the site where it is absorbed by certain wavelengths, and the same mineral can have different colors depending on whether its colors they are their own or induced, for these reasons it would not be very useful to identify them by color.

Explanation:

The color of a mineral is the property that it has of absorbing certain wavelengths, if it does not absorb any it is white, if it absorbs them all it is black. The minerals can have their own colors or induced by the presence of certain chromophores elements that are in the mineral as impurities (Fe, Mn, Cu, Cr, Co, Ni).

The properties that help geologists identify a mineral in a rock are: color, hardness, brightness, crystal shapes, density and cleavage.

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Which one of the following compounds will NOT be soluble in water?

cluponka [151]

See the correct answer is b.)PbS

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3 years ago

Calculate the mass of solute in 500cm³ of 1.5mol/dm³ sodium hydroxide solution

sineoko [7]

Answer: The general formulae for moles is n=m/mr so now we have being given to find the mass so all we have to do is to change subject

Explanation: so we have to change subject in this question to m= n× mr . so in the question below we have being given the mole as 1.5mol/dm³ so all we have to do is to find the molecular relative mass(mr) .

to find the molecular relative mass of sodium hydroxide (NAOH) we add all of the atomic masses of all the atoms present so here we have sodium oxygen and hydrogen atoms present.

NA=23 O=16 H=1 so we add 23+16+1=40 so 40 is our molecular relative mass

now we fix it in our formulae which is m=n× mr

m=1.5× 40 =60 so our mass is 60grams or 60g

HOPE THIS HELPS!!!! if i made a mistake our MAY answer may be wrong feel free to comment

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3 years ago

What element is found in group 5 period 3?

tatuchka [14]

Answer:

Phosphorus

Explanation:

A group is a vertical column on the periodic table.

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3 years ago

How many mm are equal to 21 L. How many mg are equal to 9 g. How many grams are equal to 400 kg

liberstina [14]

How many mm are equal to 21 L?

1 L = 1000000 mm

Convert:-

1000000 × 21 = 21000000

21 l = 21000000 mm

How many mg are equal to 9 g?

1 g = 1000 mg

Convert:-

9 × 1000 = 9000

9 g = 9000 mg

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3 years ago

1. In the investigation of an unknown alcohol, there was a positive Jones test and a negative Lucas test. What deductions may be

pogonyaev

Answer:

1. When observing a positive test for the jones reagent and negative for the Lucas test, it indicates that it is in the presence of a primary alcohol.

Jones reagent behaves like a strong oxidant, where it transforms the primary alcohols into carboxylic acids and the secondary alcohols into ketones. Tertiary alcohols do not react.

With the Lucas test, tertiary alcohols react immediately producing turbidity, while secondary alcohols do so in five minutes. Primary alcohols do not react significantly with Lucas reagent at room temperature.

2. No reaction (See the attached drawing)

3. (see the attached drawing)

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3 years ago