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
nikdorinn [45]
2 years ago
5

How are minerals identified?

Chemistry
1 answer:
Y_Kistochka [10]2 years ago
5 0
You can identify a mineral by its appearance and other properties. The color and luster describe the appearance of a mineral, and streak describes the color of the powdered mineral.
You might be interested in
An element's atomic number is the _____?
g100num [7]
Number<span> of protons found in the nucleus of an </span>atom<span>.</span>
6 0
3 years ago
Read 2 more answers
How many cu atoms are present in a piece of sterlingsilver jewelry weighing 33.24 g ? (sterling silver is a silver–copper alloy
emmasim [6.3K]

The mass of piece of sterling silver jewelry is 33.24 g. It contains 92.5% silver Ag by mass. Since, sterling silver is an alloy of Ag-Cu thus, percentage of Cu will be:

% Cu=100-92.5=7.5%

Thus, mass of copper will be:

m_{Cu}=\frac{7.5}{100}\times 33.24 g=2.493 g

Molar mass of Cu is 63.546 g/mol, thus, number of moles of Cu can be calculated as follows:

n=\frac{m}{M}

Here, m is mass and M is molar mass.

Putting the values,

n=\frac{2.493 g}{63.546 g/mol}=0.03923 mol

Now, in 1 mole of Cu there are 6.303\times 10^{23}atoms thus, in 0.03923 mol, number of Cu atoms will be:

0.03923 mol\times 6.303\times 10^{23}atoms=2.363\times 10^{22} atoms

Thus, number of atoms of Cu will be2.363\times 10^{22} atoms.


8 0
3 years ago
You have 255 mL of a 1.5 M solution, how much liquid do you need to BOIL AWAY to increase the molarity to 2.5 M?
Lera25 [3.4K]

Answer:

102ml

Explanation:

  1. by using the dilution formulae and then you slove for the second volume by making it subject of the fomular
  2. when you get it you then subtract the final volume that you got from the initial volume because they asked from the question what liquid do u need to boil away
6 0
2 years ago
The calorimeter pictured below shows the final temperature after calcium chloride was added to water. (The initial temperature w
max2010maxim [7]
It’s probably D or c
3 0
2 years ago
Read 2 more answers
Which of the following is an electrolyte?<br><br> a. PbCl2<br> b. MgS<br> c. HNO3<br> d. Al2(Cr2O7)3
Phoenix [80]

Answer: A: PbCl2

Hope dis helps!

8 0
3 years ago
Other questions:
  • If 4 mol 02 are used , how many moles of h2 are needed. please show work
    12·1 answer
  • What does it mean for an element to be oxidized?
    7·1 answer
  • The boundaries of a watershed are determined by
    8·1 answer
  • how much water must be added when 125 mL of a 2.00 M solution of HCl is diluted to a final concentration of 0.400M?
    8·2 answers
  • What is a atom of chemistry
    5·1 answer
  • Point M is located at (4, 6) on a coordinate grid. Point M is translated 8 units to the left and 9 units down to create point M′
    5·1 answer
  • This might look confusing but I really need help on this!!<br> I suck at chemistry
    10·2 answers
  • The relationship between an element's isotope and an element's atomic mass are related by...?
    14·2 answers
  • Covalently bonded compounds differ from ionically bonded compounds because:
    10·1 answer
  • Select the correct answer. if two half-lives have passed since a scientist collected a 1.00-gram sample of u-235, how much u-235
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!