What phase occurs when a drop of mercury on the lab bench disappears over time?

Q: A pure compound melts at 48-49 degrees celsius. If a few grains of sand are mixed in with the…

A: Melting point of a compound is a temperature at which compound changes from solid to liquid.  To…

Q: What happens when attraction between particles in a substance with a low melting point?

A:

Q: the boiling point of water under an external pressure of 0.500 atm is ________°C.

A: Conversion:-  vapour pressure         atm to torr    →0.00132 atm=1 torr   → so  0.500 atm=1…

Q: 56. This statement is correct regarding the relationship of vapor pressure with boiling point. *

A: Two multiple choice questions are given here.  The first question deals with the relation of boiling…

Q: he melting point and freezing point are the same temperature.  True or  False

A: Melting point is the point where the solid phase changes to liquid  Freezing point is the point…

Q: List the Properties of Liquids?

A: Matters are the substances that are formed by combining very small particles. Matters are not able…

Q: C Time (minutes) Temperature (°C)

A: A phase diagram is a graphical way to express the change of physical states of the material under…

Q: At the top of Mount Everest, water boils at 70  C. Explain.

A: Boiling point is temperature at which vapour pressure of liquid become equal to atmospheric pressure…

Q: What is the name of the phase change that occurs when ice left at roomtemperature changes to liquid…

A: Ice is the solid form of H2O. Water is the liquid form of H2O.

Q: What types of solids are electrical conductors, malleable and ductile?

A: Metallic solids are formed when positively charged nuclei of metal atoms are held together by…

Q: What is the normal freezing point, melting point, and boiling point of the substance

A: Matter generally exists in 3 different forms, namely solid, liquid and gas. The three states…

Q: What is supercritical fluid?

A: ANSWERE IS DISCUSSED BELOW :

Q: What types of liquids can damage a penny (copper) ?

A: Liquid that can damage a penny (copper) is usually is of acidic nature.

Q: Two white crystalline samples were left on the bench after an experiment. To help identify | them,…

A:

Q: What is the eff ect of addition of impurities on  freezing and boiling points of a substance?

A: Boiling point is temperature at which vapour pressure of liquid becomes equal to atmospheric…

Q: A sample of salt water will freeze at a higher temperature than a sample of pure water. O True False

A: The freezing point of pure water depends on the surface of the solution or solvent.

Q: What do Molecular solids consist of?

A: Molecular solids consist of molecules. For example : Ice is a molecular solid. Exception : In case…

Q: What is the vapor pressure of liquid water at 100 oC?

A: At 100 oC , the vapor pressure of water is 1 atm (atmosphere). The various ways 1atm is expressed in…

Q: List the three states of matter in order of (a) increasingmolecular disorder and (b) increasing…

A: increasing molecular disorder : gas>liquid>solid

Q: After adding salt to melting ice, what change needs to happen for the ice to re-solidify

A: The phenomenon is the lowering of melting point,  it is a colligative property.

Q: Give some related literatures about phase changes and melting point

A: Phase transitions (or phase changes) are physical processes that transition between one state of a…

Q: Fog is an example of a   A) liquid dispersed in gas B) solid dispersed in liquid C) liquid dispersed…

A: Colloids A substance is said to be in the colloidal state if it acquires a particle size ranging…

Q: 4. Water is less dense as a solid than as a liquid. A. Why can solid ice float on liquid water? B.…

A: Answer A- When water freezes into its stable form, the molecules can form extra strong hydrogen…

Q: The graph below represents the heating curve of a substance that starts as a solid below its…

A:

Q: Why are honey and maple syrup much more viscous than water?

A:

Q: What phase occurs when beads of water form on a cold drinking glass?

A: A phase is defined as the physically distinctive form of the matter such as liquid, gas, solid,…

Q: The force that causes the molecules on the surface of the liquid to form a layer (stretched…

A: The molecules present inside the liquid experiences intermolecular forces in all directions and…

Q: QUESTION 66 In capillary action, liquids will rise higher against gravity if the O diameter of the…

A: the rise of water in a thin tube inserted in water is caused by force of attraction between the…

Q: The detachment of drops of a liquid from the mouth of a dropper refers to: Unique option.   A)…

A: Surface tension and viscosity are properties of a liquid.

Q: A group of students recorded the melting points of two substances in the data table. Substance…

A: The data given is,

Q: What is needed for a liquid to freeze?

A: Matter is anything that has mass and volume, which exist in material word. Three types of matter are…

Q: What phase occurs when a scoop of ice cream begins to drip in the hot sun?

A: Matter is the substance that occupied space and has mass. Solid, liquid and gas are three main…

Q: 2.61 At a temperature of 60°F, what pressure must be imposed in order for water to boil.

A: This problem can be solved using Clausius -clapeyron equation

Q: Which of these substances has the greatest viscosity?: pancake syrup, vinegar, or milk

A:

Q: Oil molecules have higher vapor pressures than water.

A: Vapour pressure is the pressure exerted on liquids by the vapors present on its surface.

Q: Describe an experiment to show how pressure in liquid varies

A:

Q: What phase occurs when molten aluminum poured into a mold cools to form a solid object?

A: Mixing is relatively easy in the liquid state but slow and difficult in the solid-state. By melting…

Q: What happens to the viscosity of liquid with the increase in temperature

A: Viscosity is a measure of a fluids  resistance to flow. It can express the internal friction of a…

Q: Which phase has a fixed shape? O Solid Gas O Liquid

A: Solid: The atoms/molecules or the constituent are closely packed together and they are not free to…

Q: How would the boiling point of a liquid change by: a) measuring it in Denver (altitude - 5000 ft.)?…

A: Boiling point is the temperature at which the vapor pressure of a liquid becomes equal with the…

Q: A test tube contains 2.63x10-4 m3 of liquid carbon tetrachloride (β = 1240x10-6 (C°)-1) at a…

A: The volume and temperature both are related to each other. This relationship is known as Charles law…

Q: As part of an investigation into the strength of electrostatic forces between molecules of water, a…

A: Since measuring the melting point to measure the electrostatic force is very  sensitive case.  (In…

Q: 3. Determines the phase of a substance a) mass and volume b) kind c) pressure and temp.

A: We are authorized to answer one question at a time. Since you have not mentioned which question you…

Q: . Define melting point and what are the vays to set it?

A:

Q: Explain why water drops are spherical in the absence of gravity.

A:

Q: 5. If a liquid reaches the vapor pressure, what happens in the liquid?

A: The objective of the question is to explain and reason what happens when liquid molecules reach the…

Q: What is the most viscous to least viscous out of oil, ethylene glycol and hexane?

A: Viscosity is common term refers to indicate the thickness or resistance of pouring of a substance.…

Q: 2. Explain each general trend that affects the Boiling point: A. Impurities B. Intermolecular force|

A: Boiling point can be defined as the temperature at which a liquid substance starts converting into…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.