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

Q: What is one example of systematic error that can occur in an experiment and one example of random…

A: The difference between true value and an measured value of an experiment is known as errors. If any…

Q: The image above shows a student mixing two chemicals. Is she following safe laboratory practices?…

A: We are given an image of a girl mixing two chemicals:

Q: You add chocolate milk syrup to a glass of milk and stir it up the resulting chocolate milk would be…

A: When   we  add chocolate milk syrup to a glass of milk and stir it up. the resulting chocolate milk…

Q: 1- Chemistry is the science that 2- Type of chemistry that identification of substances present and…

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Q: All molecules attract each other to some extent,and the attraction decrease as the distance between…

A: Intervention between the particles depends upon the distance present between them. As stated in the…

Q: An untested explanation of a series of experimental observations is called is a tested/testable and…

A:

Q: Enumerate

A: Yes the formation of the new substances is evidenced by the color changes and formation of the…

Q: one

A: Two Different objects were put in Water. One floats but another one is sunk.

Q: Give an example of a chemical change, and explain what evidence supports that it is a chemical…

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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: What equations do I use to find the answers for the blank?

A: The heat of neutralization is the amount of heat released when base and acid combine to from salt…

Q: The volume keeeps saying it's incorrect

A: From given  Volume is calculated as follows

Q: Which of the following terms describes what a doctor forms when treating patients prior to ordering…

A: Experiment is the term required for the treatment of the patient by the doctor with the normal…

Q: B. Essay- Read and answer the question below properly and correctly Which intensive physical…

A: An intensive property is one that does not depends upon the amount of the substance.

Q: On the molecular level, what does it mean for a solid sample to be pure?

A: Applying concept of pure solid / substance via molecular basis explanation.

Q: Deductive reasoning is applied in forensic science, instead of inductive. This statement is true or…

A: The difference between inductive and deductive reasoning is that inductive reasoning focus at…

Q: This particle diagram is an example of a A)Pure substance B)Mixture Picture in Images

A: A pure substance contains only one kind of particle. A mixture contains many types of particles…

Q: Using examples, explain the difference between a physicalproperty and a chemical property.

A: The characteristics shown by a substance both physically and chemically is called a property.

Q: Which of the following is incorrect: a. General steps in quantitative analysis include: Method…

A: Statement a is correct because it include correct general steps in quantitative analysis.

Q: Classify each of the following as a physical or chemical change   Iron rusting -…

A: The change of matter that occurs without changing the chemical composition of the matter is called…

Q: a heterogeneous mixture is

A: In this question we have to tel that what is correct option of heterogeneous mixture.

Q: You might have noticed that while eating icecream on a hot day, some of the ice cream begins tomelt.…

A: Is the observed change in the state of the ice creama physical or a chemical change? Justify your…

Q: Direction: In the following questions (QUESTIONS 49-53), a statement of ASSERTION is followed by a…

A: Both Aldehyde and Ketones fall under the carbonyl compound category. Aldehyde contains one alkyl…

Q: Q10. How many moles of point to 102 degC? The r Assume that the density c

A: When a non volatile solute is dissolved in a solvent, its boiling point is raised. And the elevation…

Q: Two beakers contain clear colorless liquids, when the contents of the beakers are mixed,a white…

A: Physical change impacts only physical properties such as shape, size, melting point, and boiling…

Q: Would you expect C3H7OH to be a solid, liquid or gas? Explain your logic. (the numbers above should…

A: Lower carbon alcohols that are alcohol with 1 to 3 carbon atoms are free-flowing liquids.  Alcohols…

Q: In your own word, define the following terms:

A: Solutions measured interms of concentration Concentration : no. of moles of solute per unit volume…

Q: You are given a hammer, a battery, a bulb, wires and switch.(a) How could you use them to…

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Q: depicts

A: According to the question, we need to determine which image depicts a homogenous mixture.  We know…

Q: A ______________________is the physical combining of two or more substances (not necessarily…

A:

Q: A compound is a pure substance whose smallest representative is identified as?

A: Applying definition of compounds.

Q: Give the description of accompanying changes of: A. Iron rusting B. Burning wood C. Cooking an…

A: a. Iron rusting Answer - According to the question - Rusting of iron is a chemical change because a…

Q: Using an example, explain the difference between a physical property and a chemical property

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Q: what is the importance of studying matter and mixtures in chemistry? explain.

A: Matter can be defined as the substance that has mass and occupy space. There are three states of…

Q: Mixtures are created by physical means (mixing a substance with another; no chemical bonding); if…

A: A mixture is a material containing two or more elements or compounds that are in close contact and…

Q: Which of the following is NOTA chemical change? O a. bicycle rusting O b. antacid neutralizes…

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Q: Which of the following is not the general step in the chemical analysis? a. sampling and sample…

A: General steps in a chemical analysis Identification of the problem and formulating questions Select…

Q: What states and properties of matter does a meteor have? - describe the types of changes that matter…

A: Meteors are space rock, generally made up with silicon and oxygen. There are many types of meteors-…

Q: When large pieces of a purple-black crystalline solid are gently heated, a purple vapor is formed…

A: Solution : Change is defined as the process that shows the change in state, shape, color, shape,…

Q: A solid white substance A is heated strongly in the absence ofair. It decomposes to form a new white…

A: The chemical reaction taking place is,

Q: which seperation method is better suited for seperation of  solution of sugar and water into pure…

A:

Q: When calculating the percent error how do I know how many digits should be in my final answer can…

A: The difference between a measured value (experimental value) and an exact value (theoretical value),…

Q: Identify each of the following mixtures. Base your answers on the property described. particles that…

A: Depending upon the particle size ad properties mixture can be classified as true solution, colloid…

Q: Which expression correctly relates θ, d and λ? Explain using evidence from your observations

A: Following is the equation of θ, d and λ.

Q: Consider One Particular Issue in Our Society (for instance: industry, etc.,) and Describe and…

A: Industry It is an organization that provides and supplies goods and services. It could be primary,…

Q: Perform the conversions,and match the answers with the solutions (units omitted) and letters below…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

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.