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Romashka-Z-Leto [24]
3 years ago
15

To Identify a mineral, there are tests that are used including:

Chemistry
1 answer:
evablogger [386]3 years ago
8 0

Geologists use the following tests to distinguish minerals and the rocks they make: hardness, color, streak, luster, cleavage and chemical reaction.

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What is the empirical formula of a compound composed of 3.25% hydrogen (H), 19.36% carbon (C), and 77.39% oxygen (O) by mass?
blsea [12.9K]
CH2O3

C=19.36\12    =  1.61
H=3.25\1.008 =3.22
O=77.39\16=4.83

then dived the moles with the smallest mole 

C=1.61\1.61=1
H=3.22\1.61=2
O=4.83\1.61=3

E.F
CH2O3
8 0
3 years ago
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What often occurs at a transform plate boundary (like the San Andreas Fault in California)? *
Zarrin [17]
It’s earthquakes


hope that helps
4 0
3 years ago
Please help me with this!
Nadya [2.5K]

Answer:

10. F

11. A

12. B

13. C

14. G

15. A

16. F

17. B

18. D

19. E

20. B

Explanation:

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5 0
3 years ago
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Time (sec) [CH4] (mol/L)
Oxana [17]

Based on the table and the equation of reaction; the

  • rate of consumption of oxygen between time 20 and 40s is 0.005 M/s
  • rate of consumption of oxygen between time 40 and 60s is 0.0025 M/s

<h3>What is rate of a reaction?</h3>

The rate of a reaction is the rate at which reactants molecules are consumed or products are formed.

  • Rate of reaction = change in concentration of reactants or products/ time taken

Based on the equation of reaction, the rate of consumption of oxygen is equal to the rate of consumption of methane.

Thus. rate of consumption of oxygen from time 20 seconds to time 60 seconds is calculated as follows:

Rate between 20 and 40 = 1.0 - 0.9/20

  • Rate of consumption of oxygen = 0.005 M/s

Rate between 40 and 60 = 0.9 - 0.85/20

  • Rate of consumption of oxygen = 0.0025 M/s

Therefore, the rate of consumption of oxygen decreases with time.

Learn more about rate of reaction at: brainly.com/question/25724512

8 0
3 years ago
What is the standard cell potential of a cell made of theoretical metals ma/ma2+ and mb/mb2+ if the reduction potentials are –0.
Yuki888 [10]
The standard cell potential of a cell made of theoretical metals ma/ma2+ and mb/mb2+ is to be determined. We are given their reduction potentials:

-0.19 v for A
-0.85 v for B

To solve for the standard cell potential, examine the reaction and

the standard cell potential for this case is (-0.19- (-0.85)) v = -0.66 v<span />
6 0
3 years ago
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