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2 years ago

If you have a rock with parallel bands of white and black minerals, what type of rock would this most likely be?

Chemistry

1 answer:

vovikov84 [41]2 years ago

8 0

Answer: The Correct answer that can be said is ( Sedimentary Rock )

that being said there may be other types of rocks to use as an answer but without option choices this is my best guess

Explanation:

Sedimentary rock You find a rock in which the grains are arranged in parallel bands of white and black crystals. The rock is probably a Metamorphic rock Cooling & crystallization produce

i would appreciate brainliest have a great day

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When should a lab coat, safety goggles, and gloves be worn in the laboratory?

Sever21 [200]

I would say that you should wear a lab coat, safety goggles, and gloves when the teacher says so - not everything in a lab is dangerous, so there is no need to always wear these. But when the teacher says you should - then you should.

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3 years ago

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what is the best course of action if solid material remains in the flask after the heating step of recrystallization

lys-0071 [83]

Answer:

filter the hot mixture.

Explanation:

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3 years ago

When methanol, CH 3 OH , is burned in the presence of oxygen gas, O 2 , a large amount of heat energy is released. For this reas

luda_lava [24]

<u>Answer:</u> The mass of methanol that must be burned is 24.34 grams

<u>Explanation:</u>

We are given:

Amount of heat produced = 581 kJ

For the given chemical equation:

$CH_3OH(g)+\frac{3}{2}O_2(g)\rightarrow CO_2(g)+2H_2O(l);\Delta H=-764kJ$

By Stoichiometry of the reaction:

When 764 kJ of heat is produced, the amount of methanol reacted is 1 mole

So, when 581 kJ of heat will be produced, the amount of methanol reacted will be = $\frac{1}{764}\times 581=0.7605mol$

To calculate mass for given number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Moles of methanol = 0.7605 moles

Molar mass of methanol = 32 g/mol

Putting values in above equation, we get:

$0.7605mol=\frac{\text{Mass of methanol}}{32g/mol}\\\\\text{Mass of methanol}=(0.7605mol\times 32g/mol)=24.34g$

Hence, the mass of methanol that must be burned is 24.34 grams

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3 years ago

Filtration definition

dezoksy [38]

Answer:

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2 years ago

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Please help... ......

viktelen [127]

The liquid particles would have moved randomly because of the increase in thermal energy. They would move randomly and would be floating in the bottle moving randomly. The liquid would turn into gas form. Meaning that you would have water particles floating in the bottle moving randomly.

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3 years ago