When a substance undergoes a chemical change it is always true that ______________     heat is absorbed      it changes state     its chemical properties changes     it changes color

Q: Annie performed an experiment in her kitchen. She poured 2 cups of water in a large glass. She added…

A: Alka-Seltzer is a combination medication containing citric acid, aspirin, and sodium bicarbonate.

Q: say you have a super saturated solution which you stick a tooth pick and the mixture changes, is…

A: Given: A supersaturated solution in which you stick a toothpick and the mixture changes.

Q: A chemist fills a reaction vessel with 7.21 atm nitrogen (N,) gas, 6.92 atm hydrogen (H,) gas, and…

A: Given  Temperature = 25°C = 298°K The formation values are taken from the table given.

Q: NaOH, H₂O, heat в Ә Na Ө Na О НО OH

A: An arrow always depicts from a region of high electron density to low electron density ; that is…

Q: Using the Identification of Substances by Physical Properties table in the question above, when…

A: The answer is explained below.

Q: Chemistry is the study of _______ and the changes it undergoes.     mixtures     matter     pure…

A: Correct answer : Matter.

Q: What is the fundamental difference between a chemical change and a physical change? A new substance…

A: Chemical Change : A change where the properties of the substance undergoing the change is completely…

Q: . Sample Four was the only one that was soluble in a nonpolar solvent. What does this suggest about…

A: As this is multipart question, first three questions are solved here. Please re-post rest of these…

Q: A chemical changes       Your answer:   The substance changes   The substance stays the same…

A:

Q: the atoms of elements or molecules of compounds when a chemical change occurs and when a physical…

A: Chemical reaction and chemical change: A chemical reaction bonds between atoms are broken and new…

Q: Classify each of the following molecular art illustration as a chemical reaction or a physical…

A: Given : molecules Tip : in chemical reaction new compounds formed but not in physical change

Q: What is the term for the modification of a substance that does not alter its chemical composition?…

A: Chemical change: In chemical change composition of the substance changes. When bonds are broken and…

Q: The change of liquid water to ice is known as Group of answer choices chemical change oxidative…

A: There are two types of chages that can occur in all natural process. These are chemical change and…

Q: What is the difference between temperature and heat?     a. Temperature is the total kinetic energy…

A: Option(c) is correct

Q: What is correct from multiple choice

A: The physical change affects either state or form of the substance. It does not affect the chemical…

Q: Malleability Brittle (Malleable means- (it shatters or cracks when Element Symbo Physical…

A: Each element present our periodic table has characteristic physical and chemical properties.…

Q: Combustion of wood into ash is an example of a physical change.   Group of answer choices a)  True…

A: Physical change is a process in which after the change no new product generates and what forms can…

Q: Select the best statement: Physical changes may be reversed by changing the temperature Physical…

A: Physical change: Change in the physical properties of the substance is called as physical change.It…

Q: Classify the chemical changes as endothermic or exothermic.

A: The given set of chemical changes have been classified as endothermic and exothermic reactions based…

Q: Gasoline is composed of a variety of different liquid hydrocarbons, which do not separate as time…

A: Gasoline is composed of a variety of different liquid hydrocarbons. These hydrocarbon does not…

Q: What area of study in chemistry is concerned with the heat transfers that occur during chemical…

A: Thermodynamics is one of the topic of science which is in physics as well as chemistry.

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.