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
Alexxx [7]
2 years ago
7

What rock has a hardness of 4,and has a dull luster. What is it?

Chemistry
1 answer:
gogolik [260]2 years ago
5 0

Answer:

Fluorite

Explanation:

You might be interested in
What quantity in moles of HCl are there in 35.0 mL of 0.350 M HCl?
marta [7]

Answer:

0.0123 moles

Explanation:

Concentration = Moles / Volume of solution

or you can rearrange the formula to get

Moles = concentration (moles/liter)  x  volume of solution (liter)

First convert your volume to L instead of mL.  35mL = 0.035L

moles  =  0.350 moles/liter   x    0.035 liter  (liters cancel out)

moles = 0.0123

5 0
2 years ago
Which element is a halogen?<br> A.argon<br> B.bromine<br> C.calcium<br> D.lithium
Artemon [7]
Ii think that it is C

8 0
2 years ago
Read 2 more answers
2NaOH + H2SO4 --&gt; Na2SO4 + 2H2O
iren2701 [21]

Answer:

Sodium hydroxide, a base, reacts with sulfuric acid to form sodium sulfate (complete neutralization) and water.  If you write the balanced equation, you will see that 2 moles of sodium hydroxide react with 1 mole of sulfuric acid to form 1 mole of sodium sulfate and 2 moles of water.  Therefore it would take .25 moles of sulfuric acid to react with .5 moles of sodium hydroxide.

Explanation:

4 0
2 years ago
Read 2 more answers
How to know whether something is an "atom" or not? for example
Karolina [17]
A normal atom has a neutral charge with equal numbers of positive and negative particles. That means an atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions are atoms with extra electrons or missing electrons.


Butane is a straight chain alkane composed of 4 carbon atoms. It has a role as a food propellant and a refrigerant. It is a gas molecular entity and an alkane.
6 0
3 years ago
ANSWER ASAP PLEASE!<br> Balance the following equation:<br> _Fe + _O₂ --&gt; _FeO₃
ira [324]
It would be. 2Fe + 3O2 ——> 2Fe03. You have to make oxygen 6 on both sides in order to balance, then you can do Fe. Which on the right would be 2 by making oxygen 6. Then add the 2 to the other side to balance it.
8 0
2 years ago
Other questions:
  • How many atoms are there in 14.3 g of xenon?
    14·1 answer
  • Atoms of which element can bond to each other to form chains, rings, and networks?
    13·1 answer
  • Which situation would lead to increased competition
    15·1 answer
  • How water deposits soil sediment and rock
    8·1 answer
  • If velocity is positive, which would most likely yield a negative acceleration?
    6·2 answers
  • Which of these are elimination reactions? Check all that apply.
    7·1 answer
  • How many milligrams of product can be produced from the complete Diels-Alder reaction of 180. mg of anthracene and 100. mg of ma
    6·1 answer
  • The formula in my book for carbonate is Co32- and I’m confused because carbon has 4 valence electrons and oxygen has 6 . How doe
    8·2 answers
  • Match each part of the electrochemical cell with its function.
    8·1 answer
  • Which of the following two conditions will favor a spontaneous reaction?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!