1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aliina [53]
3 years ago
11

A mineral sample scratches fingernails, pennies, and glass but does not scratch steel as shown below. what is the hardness of th

e mineral?
Chemistry
1 answer:
Elodia [21]3 years ago
4 0
Friedrich Mohs devised a scale that tested mineral <span>hardness, </span>which means the resistance of a mineral to being scratched. This scale (from 1 to 10) is known as the Mohs Hardness Test. Objects are used as tools to perform the hardness test:
<span>fingernail (hardness = 2,5).
copper penny (hardness = 3)
glass plate or steel knife (hardness = 5,5)
<span>steel file (hardness = 6,5).
According to this scale </span></span><span>hardness of the mineral is between 5,5 and 6,5.</span>
You might be interested in
What are the 5 indicators of a chemical reaction? What are the 5 indicators of a chemical reaction? I only know 3 for sure:2) Ch
Colt1911 [192]
Temperature change, colour change, releasing gas, bubbles and change in odor
5 0
3 years ago
As the number of protons increases but the distance between the protons and electron REMAINS THE SAME...
Aloiza [94]

Answer:

The correct option is;

The electronegativity increases

Explanation:

The electronegativity is the measure of an atom's ability to attract a shared electron pair. The electronegativity of an atom is dependent on the atom's atomic number and the separation distance between the electrons in the valence shell and the positively charged nucleus such that an increase in the atomic number results in an increase in electronegativity and an increase in the distance between the valence electrons and the nucleus, leads to a decrease in electronegativity.

8 0
3 years ago
starting with the idea of isostasy and ending with plate tectonics, explain how scientists understanding of the earth's crust ha
anzhelika [568]

Answer:

Isostasy controls the regional elevations of continents and ocean floors in accordance with the densities of their underlying rocks. ... The concept of isostasy played an important role in the development of the theory of plate tectonics.

8 0
3 years ago
Which of the following is not a correct chemical equation for a double displacement reaction?
sergeinik [125]
Where are the options?
6 0
3 years ago
On a hot summer day, air rises most quickly when it is above a
NNADVOKAT [17]

Answer:

air rises most quikly above water so i'm confuse it's lake or river

6 0
3 years ago
Read 2 more answers
Other questions:
  • Look at the reaction below.
    8·2 answers
  • What state of matter has a defined volume and takes the shape of its container?
    6·1 answer
  • A carbon skeleton is covalently bonded to both an amino group and a carboxyl group. When placed in water it ____
    11·1 answer
  • When 32 grams of aluminum react, the actual yield is 105.5 grams, what is the percent yield?
    8·1 answer
  • Determine the empirical formula for a compound that contains 15.8% carbon and 84.2% sulfer
    8·1 answer
  • Every atom of the __ carbon has six protons
    13·2 answers
  • In order to determine the answer to a chemistry problem, a student first converted the given percentages to mole by assuming the
    15·1 answer
  • Wave<br> is the distance a wave travels in a given<br> amount of time.
    5·1 answer
  • What are the names of the elements symbolized by Ba , Na , and Fe , respectively? Spelling counts!
    7·1 answer
  • What chemicals do I need to make elephant’s toothpaste
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!