What is the triangle sign stands for?

Q: The heat of fusion of pure silicon is 43.4 kJ/mol. How much energy in kJ would be needed to melt a…

A: Given that -  Heat of fusion of pure silicon  = 43.4 kJ/mol  Mass of silicon sample = 8.23 g  Atomic…

Q: Choose the correct statement.

A: Matter is defined as anything which is having mass and occupies space  Matter mainly existed in…

Q: the states that the total energy of the universe is constant. When heat exits the system during a…

A: Answer of above question are given as:

Q: Select the one substance that has the corresponding property Choose the correct letter for each row

A: Force of attraction is the force that binds the particles together. The pressure exerted by a…

Q: Which of the following is not a property of a metallic solid? O malleable soluble in water O…

A: Metallic solids are solids composed of metal items that are held together by metallic bonds.

Q: What does it mean to graph reciprocal?

A: The reciprocal of function is determined by dividing 1 by the expression of function.. Example: If a…

Q: Which phase of the Moon occurs when the moon is between Earth and the Sun? O New Moon O Waxing…

A:

Q: The heat of fusion of pure silicon is 43.4 kJ/mol. How much energy in kJ would be needed to melt a…

A: Amount of silicon present = 7.4 g The heat of fusion of pure silicon is 43.4 kJ/mol Atomic Mass of…

Q: I" * Critically discus the term " Heating"

A: A question about the term heating, which is to be accomplished.

Q: Differentiate between kinetic energy and polar energy?

A: Kinetic energy is the form of energy which results as object's motion whereas polar energy is the…

Q: Is this statement true or false and why?

A: Alcohols are the functional group with chemical formula -OH. It is attached to the alkyl chain.…

Q: In terms of heat energy, what happens when a solid changes to a liquid and then to a gas

A: Heat energy is essential for the transformation of physical states. Heat is a form of energy which…

Q: In the illustration, O is color-coded as red. What kind of change is represented by this…

A: In the given question, molecular arrangements are shown by the red dots. Here O is color-coded as…

Q: The heat of fusion of pure silicon is 43.4 kJ/mol. How much energy in kJ would be needed to melt a…

A: heat of fusion of pure silicon = ∆Hfus =  43.4 kJ/mol Mass of silicon = 9.44 g Atomic mass of Si =…

Q: If 44.8 kJ of heat were added to 166 g of liquid water (specific heat of 4.184 J/g °C) at 18 °C, how…

A:

Q: Calcium chloride is an ice melting compound used for sidewalks and streets. This is an exothermic…

A: A solution can be defined as the mixture that consists of two components; solute and solvent.Here…

Q: Calculate the total amount of heat energy needed (in Joules) to accomplish this.

A: The total heat energy required is the sum of heat energy required to heat the -15 degree ice to 0…

Q: mixtures =) Complete: A mixture is composed of substances which are not chemically combined.…

A: Let us define the mixture and then fill the blanks.

Q: What is a mixture is a combination of

A: To explain: A mixture is a combination of what?

Q: Larry explains to his classmate that line segments B-C and D-E represents moments of the heating…

A: No, Larry is wrong.

Q: All of the following statements are true EXCEPT

A: Food additives are the substances that are added to food items to preserve them or to enhance their…

Q: Hurricanes can travel for thousands of miles over warm water, but rapidly they lose their strength…

A: Hurricanes can travel over warm water with the help of the heat energy of water.

Q: The question is in the image.

A: Given data 1. C(s) + O2(g) ---> CO2(g), DH = -394 KJ 2. H2(g) + 1/2O2(g) ---> H2O(l), DH =…

Q: The study of energy changes that accompany chemical and physical changes is known as? Select one: a.…

A: Thermochemistry

Q: The heat of fusion of pure silicon is 43.4 kJ/mol. How much energy in kJ would be needed to melt a…

A: Melting is defined as the process which convert from solid to liquid

Q: The change in state from solid to gas.

A: The correct answer is Sublimation. Option D

Q: JJ Thomson is credited with the discovery of

A: J J Thomson, in full Sir Joseph John Thomson, (born December 18, 1856) is English physicist who…

Q: Sound require a medium in order to transfer energy. does does not

A: Sound waves are basically a form of longitudinal waves which are formed by compression and…

Q: Calculate the amount of heat required t

A: Q= mc∆T  Q= heat required  c is specific heat  ∆T = change in temperature

Q: A periodic table trends that energy required to add an energy.

A: Given, A periodic table  trends that energy required to add an electron.

Q: The Law of Conservation of Energy states that: o Heat lost by one object must be Select an answer by…

A: Energy can be defined as the ability to do work.Energy can be of different types. Energy may be…

Q: Is heat absorbed or released between points D and E. How does it relate to the physical state(s)…

A: Is heat absorbed or released between points D and E has to be given,

Q: which of the following substances would have the least amount of heat of formation A. Gaseous…

A: Standard Heat of formation or standard enthalpy of formation Denoted by ∆H.

Q: A hot pot of water is set on the counter to cool. After a few minutes it has lost 335 J of heat…

A: In this question, we will determine the heat energy gained by the surrounding.  You can see the…

Q: What are the physical states of the compound that exist between the indicated letters in the chart…

A: A to B the compound must be in solid states .

Q: 6. Explain the direction in which heat energy will flow in the picture shown to the left.

A: Following is the direction of flow of heat energy according to Thermodynamic laws.

Q: n K, and K,f

A:

Q: Why is arrangement of the constituent atoms or molecules are important in determining the properties…

A: The arrangement of the atoms or molecules is more important in determining the properties.

Q: ? Ammonia boils at -33.4°C. What is the temperature in °F 28.1°F- .A O 60.1°F- .B O 13.5°F+ .C O…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: What is heat? Explain the difference between heat and temperature?

A: The thermodynamics functions are measured by using some fundamental parameters like temperature,…

Q: how can I tell weather an atom is positive, negative, or neutral (and by how much)?

A: In an atom we have protons, neutrons and electrons. The electrons are negatively charged and protons…

Q: What is AL

A: ANSWER IS DISCUSSED BELOW :

Q: Melt water mass Hot water temperature change °C Melt water temperature change °C Heat lost by hot…

A: We need to calculate the enthalpy of fusion using the given experimental data.

Q: How do we get to this equation (for number two) ?

A: The given gases are Nitrogen (N2) and hydrogen(H2), they react together at high temperature and high…

Q: The Earth has four seasons due to its: O rotation O distance from the sun O tilted axis and…

A: Tilted axis and revolution are the reason of earth has four season.

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.