A 12.5-g marble display 5.0 mL of water. The density is 2.5 g/ ml.
Density is defined as a measurement of how tightly packed the mass is within a substance or object. The concept of density is crucial because it enables us to predict which compounds will float and which ones will sink in a liquid. As a rule, objects float as long as their density is lower than the liquid they are placed in.
The density of a substance is determined by the mass, size, and arrangement of its atoms. Density is calculated by dividing a substance's mass by its volume.
Density = Mass / Volume
Given Mass = 12.5 g
Volume = 5.0 ml.
Density = 12.5 g / 5.0 ml
Density = 2.5 g / ml
Thus, a 12.5-g marble display 5.0 mL of water. The density is 2.5 g/ ml.
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Answer:
The amount of energy release a reaction is depended on how strong the binding energy hold the particles together
In nuclear reaction, they're breaking nucleus bind apart , which create a huge amount energy that cause by the separation of the bind. The amount is far greater than in chemical reaction which only separate the binds of electrons.
Explanation:
Answer:
Crushing or grinding increases the surface area of the salt that is exposed to the molecules of water. Stirring increases the speed at which the particles of salt come in contact with the water molecules.
The process in which a substance changes from a gaseous state to a liquid state is condensation
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Answer:
Condensation is the change of state from a gas to a liquid
silver?
To find the mole fraction of silver in the mixture, divide the moles of silver by the total moles of both elements.
To find the mole fraction of silver in the mixture, we need to calculate the moles of silver and iron. First, calculate the moles of silver by dividing the mass of silver by its molar mass. Then, calculate the moles of iron in the same way. Finally, find the mole fraction of silver by dividing the moles of silver by the total moles of both elements in the mixture.
Moles of silver = mass of silver / molar mass of silver
Moles of iron = mass of iron / molar mass of iron
Mole fraction of silver = moles of silver / (moles of silver + moles of iron)
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b. oxidizing agent
c. weak base or acid
d. strong base or acid
Indicators are compounds which are weak bases or weak acids as they can dissociate into ions .The correct option is C.
Indicator is defined as a chemical substance which is chemically a weak acid or a weak base which changes it's color depending upon the concentration of hydrogen ions present in the solution.They dissociate slightly in water to produce ions.
These are generally derived from plant pigments and are of slightly acidic or basic in nature.There are three types of indicators:
1) natural indicators
2) synthetic indicators
3) olfactory indicators.
These are mainly used in determination of end point of titrations. Every indicator has it's pH range in which it can perform effectively.These are usually organic compounds.
As weak acids and bases are easily dissociated ,thus indicators are weak bases or weak acids.Thus, the correct option is C.
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