CHEMISTRY HIGH SCHOOL

What is the general procedure from extracting a metal from its ore

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Answer 1
Answer: Ores are naturally occurring rocks that contain metal or metal compounds in sufficient amounts to make it worthwhile extracting them. For example, iron ore is used to make iron and steel.

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At 25C and 795 torr, carbon dioxide has a solubility of 0.0356 M in water. What is the solubility at 25 C and 2070 torr? ____ MI know that at a given temperature, the solubility of a gas in a liquid is directly proportional to its pressure but how would that be set up in an equation..?

What are a few examples of what energy is?​

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✅Energy exists in many different forms✅

Examples of these are: light energy, heat energy, mechanical energy, gravitational energy, electrical energy, sound energy, chemical energy, nuclear or atomic energy and so on. Each forms can be converted or changed into the other forms.

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An element has an atomic number of 92 and a mass number of 234. how many neutrons does the element have? 192 142 92

Answers

the atomic number of an element is characteristic to that element. Atomic number is the number of protons of that element.
Mass number is the sum of protons and neutrons of the element.
since protons and neutrons have a mass of 1 unit each, they together make up the mass of the element.
atomic number - number of protons - 92
mass number - number of neutrons + protons = 234
number of neutrons = mass number - atomic number 
neutrons = 234 - 92 = 142
answer is 142

Why do we increase the surface area of a solid when dissolving? a) to decrease the rate of dissolution
b) to decrease the temperature
c) to increase the rate of dissolution
d) to decrease the need for agitation

Answers

The correct answer is C. Increasing the surface area of a solid when dissolving, increases the rate of dissolution of the solid solute in the solvent. This happens because dissolving involves the collision of the surface

Answer:

c) to increase the rate of dissolution

Explanation:

Predict the products in the following reaction: AgNO3(aq) + Na2CrO4(aq) →

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You expect Sodium Nitrate and Silver Chromate, just go ahead and make sure your complete reaction is balanced

A liquid boils when its vapor pressure equals the pressure of the atmosphere.TRUE

FALSE

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The answer is true. A liquid boils when its vapor pressure equals the pressure of the atmosphere. At this point, vapor can now readily escape from the liquid phase because it has an equal pressure now with its surrounding which, basically, is in the vapor phase.

Answer:

True

Explanation:

The boiling point of a liquid is the temperature at which the vapour pressure of the liquid equals the pressure of the surrounding atmosphere.

When a liquid is heated, the vapour pressure gradually increases till it matches the ambient pressure. Gas bubbles begin to form within the liquid, rise to the surface and then burst up to release gas. At this point, we say the liquid is boiling.

The lower the surrounding pressure, the lower the boiling point of a liquid and vice versa. Water boils at lower temperature in high altitudes because of lower pressure as compared to sea level.

Correct option: True.

Phytoplankton are microscopic photosynthesizing organisms that typically live in the upper layers of the ocean. What trophic level do phytoplankton belong to?

Answers

Answer:

Primary producers

Explanation:

Phytoplankton belong to the primary producers trophic level. Beings of the other levels gain energy from phytoplankton. Phytoplankton are also capable of transforming inorganic carbon into protoplasm.
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