ircle which of the following observations is/are examples of chemical change.(you can have more than one answer)

Q: Suppose a teaspoon of magnesium filling and a teaspoon of powdered sulfur are placed together in a…

A: MIXTURE : Mixture is defined as the physical combination of two or more different substances such…

Q: . A chemist mixes sodium with water and witnesses a violentreaction between the two substances. This…

A: The given statement is   A chemist mixes sodium with water and witnesses a violent reaction between…

Q: Classify each of the following as a physical change or a chemical change. For each chemical change,…

A: Physical change is the rearrangement of the molecules ( composition remains same) In Chemical change…

Q: Nanotechnology, the field of building ultrasmall structures one atom at a time, has progressed in…

A: Hello. Since the question has multiple subparts, the first three subparts are solved. In case the…

Q: Which statement describes all chemical changes, but not all physical changes? O Bubbles are…

A: The statement which describes chemical changes has to be given,

Q: What is the relationship between these concepts: physical properties, chemical properties,…

A: Physical properties & chemical properties describe the characteristics of a substance. Density…

Q: 33. State whether each of the following conversions is possible or impossible and WHY. For any…

A: We have given five unit conversions. We have to tell whether these conversions are possible or not.…

Q: A student mixes some soap with water and then blows through a straw into the solution. is it a…

A: Physical changes are those which do not involve any chemical reactions to be taking place only the…

Q: Two samples of solids have similar reactivity with acids and similar densities. Their masses and…

A: Extensive properties are the ones whose value depend on the size of the system like mass , volume…

Q: The Statue of Liberty is made of copper metal. Copper metal has the physical property of being…

A: The statue iof liberty is made of  copper metal. Over the periods  the copper has gone through a…

Q: 33.0 pl. drops of two different liquids are put on the same surface: Liquid X Liquid Y Note for…

A: Given that neither the liquid X nor the liquid Y interacts strongly with the surface. This means…

Q: Is baking considered a physical change or a chemical change?

A: Baking is a process in which item to be baked is mixed with baking soda and heated in oven. Baking…

Q: Physical and Chemical Change Worksheet Classify the following as a physical or a chemical change and…

A: Since you have posted questions with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: Cite the evidence that indicates that only physical changes occur when a platinum wire is heated in…

A: Physical change means any kind of change of a substance's form like size, colour etc. without being…

Q: change

A: Dear student I have given answer to your question in the image format.

Q: 20 An aqueous potassium iodate (KIO3) solution is made by dissolving 538 g of KIO3 in sufficient…

A: mass of KIO3 = 538 gvolume of the solution = 4.20 Lmolarity of the KIO3 solution = ?Note: molar mass…

Q: Classify each change as physical or chemical. (a) the explosion of gunpowder in the barrel of a…

A: ANSWER

Q: Is gas escaping from an opened soft drink anexample of a chemical or a physical change? Explain.

A: In physical change there are no new substance created. Easy physical techniques may be used to…

Q: How do I know the difference between physical and chemical changes?

A:

Q: Match the name to the organic compound

A: We can determine the name of the compounds by knowing the functional group present in them.

Q: If a red and green solution are mixed and an orange mixture esults, is this evidence of a physical…

A: Physical change is the change in which physical property of the compound changes and it is…

Q: The diagram in (a) shows a compound made up of atoms of two elements (represented by the green and…

A: Physical change diagram is (d). Molecular formula will not change in physical changes and only…

Q: Which of the following processes is a physical change? (a) evaporation of water; (b) combination…

A: In physical change, there is no change in the chemical composition.

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.