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
Radda [10]
3 years ago
5

A student found a pretty rock while hiking with her family. She discovered

Chemistry
1 answer:
Veronika [31]3 years ago
7 0

Answer:

If the rock can't scratch a knife, but glass, it's a 7-10 (Hard Rock)

It's between Quartz and Topaz.

So the answer is,

<h2>F.</h2>

You might be interested in
Which type of relationship is responsible for teaching you values and how to communicate?
Blizzard [7]
The answer would be family.
8 0
3 years ago
you are a fireworks maker. For the safety of the workers producing the material you want to reduce the rate of reactions to prev
Citrus2011 [14]
Physical methods: reduce the temperature and pressure
6 0
3 years ago
If you have 0.75 moles of an ideal gas at 87 °C and a pressure of 569 torr, what volume will the gas take up?
vivado [14]

Answer:

29 L

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

5 0
3 years ago
What is not consider a property of substance
nasty-shy [4]

Answer:

f

Explanation:

4 0
3 years ago
Calculate the enthalpy change for the reaction 2 hcl → h2 + cl2 1. +184 kj/mol of rxn 2. +428 kj/mol of rxn 3. 0 kj/mol of rxn 4
lesantik [10]
Below is the list of enthalpies of formation of the compounds involved in the chemical reaction.

HCl: -92.3 kJ/mol
H2: 0 
Cl2: 0

Both H2 and Cl2 do not have enthaply of formation because they are pure substances. 

Since, in the reaction there are 2 moles of HCl,
   Enthalphy of formation = enthalpy of products - enthalphy of reactant/s
                = 0 - (-92.3)(2) = +184.6 kJ

Hence, the answer is the first choice. 
5 0
3 years ago
Other questions:
  • What can be concluded about the atom from knowing that oxygen 18 has an atomic number of 8?
    15·2 answers
  • What kinds of materials can laboratories test?
    12·1 answer
  • Explain how a heat pump is used to both heat and cool a building?
    8·2 answers
  • Is food coloring in water a mixture or pure substance
    13·2 answers
  • WILL GIV, BRAINLISE IS URGENT PLZZZ
    14·2 answers
  • X2o3 express you answer as a whole number
    5·1 answer
  • Can some one pls help me
    9·2 answers
  • Alcano con 1 carbono?
    7·1 answer
  • How do you find mole ratios?
    6·1 answer
  • Why does neon gas consist of individual, unbonded neon atoms while chlorine exists as diatomic chlorine molecules?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!