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Georgia [21]
3 years ago
15

Which of these rocks forms from lava that cools very quickly?

Chemistry
1 answer:
den301095 [7]3 years ago
4 0

The answer is D. obsidian. Or at least I think it is. Just guessing based off me playing Minecraft 6 years ago haha

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A clear, pure liquid sample is brought into the lab and exposed to an electrical current. Different gases are produced on each o
aleksklad [387]
It would be a compound.
4 0
3 years ago
A mixture of 18 % 18% disinfectant solution is to be made from 16 % 16% and 23 % 23% disinfectant solutions. How much of each so
jeka94

Answer: 20 gallons of 16% and 8 gallons of 23% solution is usedfor 28 gallons of the 18 % solution.

Explanation:

According to the dilution law,

C_1V_1+C_2V_2=C_3V_3

where,

C_1 = concentration of ist disinfectant solution = 16 %

V_1 = volume of pure acid solution = x gallons

C_2 = concentration of another disinfectant solution= 23%

V_2 = volume of another acid solution= (28-x) gallons

C_3 = concentration of resulting disinfectant solution = 18 %

V_1 = volume of resulting acid solution = 28 gallons

16\times x+23\times (28-x)=18\times 28

x=20galllons

(28-x) = (28-20) = 8 gallons

Thus 20 gallons of 16% and 8 gallons of 23% solution is usedfor 28 gallons of the 18 % solution.

7 0
3 years ago
Los procesos químicos que permiten reciclar el carbono entre plantas y animales son:​
tigry1 [53]

Answer:

En un proceso llamado respiración, los animales y las plantas toman oxígeno del aire y devuelven dióxido de carbono.

Explanation:

Tuve que usar un traductor para esto, lo siento si no lo entiendes completamente.

7 0
3 years ago
¿Cual es porcentaje de una solucion que contiene 10g de sal disueltos en 500 mL de solución?
never [62]

Answer:

0.02 g/ml

Explanation:

si dividimos 10 con 500, es decir, 10/500, obtenemos 0.02. Las unidades serán g / ml.

4 0
3 years ago
An industrial chemist is studying a sample of an unknown metal. Describe two ways he could change the metal physically and two w
Vitek1552 [10]
Physical: slicing or cutting and painting it with a different color

Chemical: rusting
5 0
3 years ago
Read 2 more answers
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