31. is the money left after all costs and expenses of a business are paid.

Q: What are signifi cant fi gures and how are they used in calculations?

A: Number is a mathematical entity which is used to count, label and measure. The examples of natural…

Q: The reaction which consume energy and change kinetic energy into chemical energy are said to be?

A: Photochemical reactions are those reactions which involved the consumption of light energy. Then the…

Q: - A piece of zinc (Zn) is immersed in aqueous hydrochloric acid solution. According to this which of…

A: Given: Metal Zn is immersed in aqueous hydrochloric acid i.e. HCl solution.

Q: -1 A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a…

A: Concentration of salt in Lake Parsons was found to be 25.6 g L-1. The average concentration of salts…

Q: 16. What is the law of conservation of mass?

A: The law of conservation of mass states that :"The mass in an isolated system can neither be created…

Q: 3. If a student had access to a balance for this procedure, they would also be asked to weigh each…

A: • % Composition of A in mixture = Mass of AMass of Mixture x 100Given,Mass of Iron = 2.85g.Mass of…

Q: I am a bit confused.  Isnt the formula to find the change in temperature the Final Temperature minus…

A: q = heat energy q = heat energy is the total amount of energy. This is an amount and has no…

Q: When a loan pre-approval is provided to a buyer, what does it mean? The borrower qualifies for a…

A: The objective of the question is to understand the meaning of loan pre-approval in the context of a…

Q: Describe the chemical reaction that produces flame in wildfire. Describe both energy and matter…

A: Fire is heat and light from rapid combination of oxygen and other materials. For fire to exist a…

Q: The defining features of the states of matter .

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Q: Which mixture can be separated into its components by adding water then filtration? a. Potassium…

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Q: Distinguish the difference between a coefficient and a subscript?

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Q: What is the most common way that energy is exchanged with the environment during a chemical…

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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: When heat is added to a solid, what will happen to the particles of that solid?

A: Solid  is stable in shape or we can say it has a defined shape and volume . For example ; ice is a…

Q: Calculate the number of joules in calories 258 calories =? JOULES 9740 J = ? CALORIES  PLEASE…

A: The energy is measured using units such as Calorie and Joules. The relation between Calorie and…

Q: The reactions which consume energy and change kinetic energy into chemical energy are said to be?

A: The reactions which consume energy in a chemical reaction are called endothermic reactions. This…

Q: The quantity 26.0 kJ is equal to how many calories?

A: We have energy as 26.0 KJ . We have to convert it to Calorie .

Q: 1.) In the laboratory a student finds that it takes 4.75 calories to increase the temperature of…

A: 1) Given: Mass of lead = 10.4 g. Amount of heat added = 4.75 calories. The initial temperature of…

Q: What is a mixture is a combination of

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

Q: Consider the example of the block released from the spring and then travelling up the circular ramp.…

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Q: Q3. A balsamic vinegar sample was subjected to acid-base titration and found to contain 5.7% acetic…

A: I can solve from given data..

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Q: Evidence of a chemical reactions is anything that shows... A.a change in the state of matter B.…

A: A new substance has formed. Option C

Q: 13) 5.0 x 1024 moecules S, Clu →?mores S

A:

Q: Determine the mass of silver chromate that will dissolve in 1.0-gallon of water. (Note: 1 gal =…

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Q: A chemist measures the amount of nitrogen gas produced during an experiment. She finds that 4.05 g…

A: Nitrogen  gas produced 4.05 g

Q: Assume that the mass of impure acetanilide is 2.229 g. And the mass of recrystallized acetanilide is…

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Q: The techniques like filtration and centrifugation are being used for separation of various chemical…

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Q: What is the difference between a physical and chemical change? Give at least three signs of a…

A: Difference  between  chemical  change  and  physical  change.  Physical change is a type of change…

Q: Suppose you are measuring the mass of a solid sample on a balance using a weigh boat. You record the…

A: An instrument used to determine the weight of samples used in analysis is called a weigh balance.…

Q: A physical change occurs when iron rusts. occurs when sugar is heated into caramel. occurs when…

A: A physical change is a change which affects  the form of a chemical substance, but not its chemical…

Q: X 12. Which of the following is not 0/1 something which happens during a chemical change: * Gas is…

A: In a chemical change, reactants are converted into the products.

Q: what is the mass of calcium carbonate reacted?

A: Given, Mass of marble before reaction 3.0g Mass of marble after reaction 1.8g

Q: a 4. Color B. reacts to Igt barticles hen Shape State mallenbil A temprkmg itygas bubd Chemical or…

A: The answer is given below

Q: 22. Energy is not considered a form of matter. Which of the following reasons correctly explains…

A: Matter: This is a part of universe. Matter is has measure the mass. Matter has own volume .  Energy:…

Q: Figure 2 H₂O2 (1) - ---> H₂O₂ (g) H₂O₂(aq) -- ---> H₂O (1) + O2 (g) Which of the following…

A:

Q: In an oxidation-reduction reaction, a piece of copper wire was put into silver nitrate solution.…

A: In a chemical reaction, two or more reactant molecules may combine or decomposes to form the new…

Q: Is the solution of ammonium chloride in water an exothermic or endothermic process.

A: When ammonium chloride is dissolved in water, it produces an endothermic reaction, i.e. energy is…

Q: What is the difference between a physical change and a chemical change?

A: The difference between physical and chemical change are given by

Q: What is a chemical property of a matter

A: A Matter is anything that occupy space ( volume) and gas a mass and it may be sensible by our one or…

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: The vapor pressure of liquid propanol, C3H,OH, is 100 mm Hg at 326 K. A sample of C3H,OH is placed…

A: “Since you have posted multiple questions, we will provide the solution only to the first question…

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.