Classify each statement as an observation, a law, or a theory.a. Chlorine is a highly reactive gas.b. If elements are listed in order of increasing mass of theiratoms, their chemical reactivity follows a repeating pattern.c. Neon is an inert (or nonreactive) gas.d. The reactivity of elements depends on the arrangement oftheir electrons.

Q: Describe whether the following are physical or chemical properties. Explain your answer in no more…

A: To determine whether the below process is chemical or physical. Alcohol tends to disappear faster…

Q: Describe and write about the history of the atomic theory. Compare the five theories.

A: Atomic theory: The theory that tells about the structure of the atom is named atomic theory. Atomic…

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A:

Q: 1.61 km = 1 mi The speed of light is 3.0 x 108 m/s. What is the speed of light in mph and how many…

A: 1 hour = 3600 seconds1 Km = 1000 m 1 m = 10-3 Km 1.61 Km = 1 miles(mi)

Q: A piece of weighing paper recorded a mass of 0.200 g. An object was placed on the weighing paper to…

A: Mass of object =10.900-0.200                               =10.700g

Q: Which of these statements is TRUE about physical states? a. A solid is compressible b. The only…

A: a) Solids is that physical stage which are have particles packed very densely. Since the particles…

Q: Which of the following statements is correct? A. All metals are shiny and can conduct electricity.…

A: Which of the following statement is correct ?  A. All metals are shiny and can conduct electricity.…

Q: 4. It is possible for equal volumes of gases, at standard pressure and temperature, to contain equal…

A: Given Temperature , Pressure are constant.

Q: Question 16 Which one of the following is a physical change? A. CH4(g) +202(g) → 2H₂O(g) + CO2(g) C.…

A: Q-16)  A physical change is :-  H2O (s) →H2O (l) (Option- C)

Q: 7.The density of osmium is 22.6 g/cm³. A sample of osmium with a mass of 21.8 g would occupy a…

A: General chemistry.

Q: The following shows the mass ratio of Ca and CI2 and the mass of CaCl2 formed in various…

A: The mass ratio of calcium and chlorine and the mass of calcium  chloride obtained in four different…

Q: Which is more "correct", a theory or law?

A: Given statement is :  Which is more "correct", a theory or law?

Q: Which of the following is not an element? O A. Ammonia O B. Silver O C. Aluminum D. Magnesium O E.…

A: A substance that cannot be broken down into simpler substances by chemical means. An element is…

Q: Classify each of the following as an element, a compound, or a mixture a. Oxygen gas b. Sea water c.…

A: a. Oxygen contains similar atoms. So, from the definition; the substance having a similar atom is…

Q: A sample of sodium reacts completely with 0.142 kgkg of chlorine, forming 234 gg of sodium chloride.…

A: A)  Given :- mass of Cl2 = 0.142 kg or 142 g  Mass of NaCl formed = 234 g  To be calculated :-  Mass…

Q: Which group of substances contains only elements?   A. salt, copper, aluminum   B. silicon,…

A: There should not be any mixture or molecule or compound in the option.

Q: You made a 36.6 g sample of a compound made of carbon and oxygen. You know that 10.0 g of carbon…

A: Number of moles = Mass/Molar mass

Q: An automobile gasoline tank holds 41 kg of gasoline. When the gasoline burns, 144 kg of oxygen is…

A: According to the law of mass of conservation, the mass of compound can neither be created nor…

Q: Ivume: Density of Group 14 Element s Sn Pb 9.15g mass of element 27.11g 44.30g volume of H20 alme…

A: Volume of metal = (Volume of water+ element - Volume of water) Density = Mass / Volume

Q: A sample of calcium chloride, CaCl2, has a mass of 27.8 g. What mass of chlorine is present in the…

A:

Q: 2. is a statement about a regularity in nature law a. b. theory c. d. hypothesis Both a and c In the…

A: These questions are based on fundamental concepts in the scientific method and the philosophy of…

Q: List three examples of substances. Explain why each is a substance.

A: List three examples of substances. Explain why each is a substance.

Q: Define matter. Identify whether or not each of thefollowing is a form of matter. a. microwaves d.…

A:

Q: Given the data below, calculate the mass of copper in the original sample. Mass of original sample…

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Q: Determine whether each change is physical or chemical.a. Water boils.b. A match burns.c. Sugar…

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Q: 2. Which of the following statements is a theory? A. In a reaction, the total mass of reactants is…

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Q: A student added 5 grams of calcium chloride, a white solid substance, to 15 grams of water at 220 C.…

A: Given : 5 g of Calcium chloride i.e CaCl2 is dissolved in 15 g of water at 22 oC.

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A: We are to discuss which of given options about scientific theories and laws is correct.

Q: 2. Elizabeth has two separate samples of the same substance. One sample is in the liquid state, and…

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Q: 13. While cleaning your attic, you found your old rock collection. If 83.58% of the rocks have a…

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Q: Classify each statement as an observation, a law, or a theory. Chlorine is a highly reactive gas.

A: A series of similar respective observations leads to the development of a scientific law. A theory…

Q: ne of the best learning in school is learning HISTORY, i.e. the history of Chemistry, we know that…

A: The history of chemistry starts from the ancient time span to the current era. Examples:  1.…

Q: Identify each as a homogenous mixture, a heterogeneous mixture, a compound, or an element.a. pure…

A: The chemical combination of 2 or more elements form a compound. Materials containing more than 1…

Q: 21. A 12.0 g sample of which of the following substances (same list as in the previous question)…

A: For a fixed mass, the liquid will have more volume as compared to the solid.  In solid the particles…

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A: Element is pure form of substance consist only one type of atoms

Q: Which accurately shows the Law of Conservation of Matter (Mass)? A. When 2 oxygen molecules combine…

A: Law of conservation of mass states that mass can neither be created nor be destroyed although it can…

Q: Please help me with questions 1 and 2 1. What is an example of matter? A. Light B. None of the…

A:

Q: 1. A student measured a 6.790 g sample of a hydrated salt. After heating, the mass of anhydrous salt…

A: a. Given that weight of hydrated salt is 6.790 g and mass of anhydrous salt is found to be 4.501 g.…

Q: True or False? * Qualitative and quantitative data gathered via laboratory experiments is one of…

A: Qualitative data is not numerical, it is descriptive. Quantitative data gives a numerical value,…

Q: Explain the difference between a law and a theory?

A: Various ideas are formulated by the scientists and some are derived experimentally using various…

Q: The mass of the solution totals 20 grams.   C. The temperature of the solution is 350 C.   D.

A: Correct option is C. The temperature of the solution is 35 degreeC. These is due to when calcium…

Q: Section 1.1 Chemistry in Context 1. What is the purpose of using the Scientific Method? 2. Define…

A: Question 1 - - >  The scientific method is the process by which scientists attempt to…

Q: Which of the following statements is FALSE? a. A mixture may be either homogeneous or…

A: The states of matter are solid, liquid and gases. Matters are further classified as mixtures and…

Q: 19. List four properties you could use to distinguish between iron and aluminum. State which of them…

A: Since you have asked multiple question, as per our company guidelines we are supposed to answer the…

Q: classsify into solid, liquid or gas Particles are close together but are not held rigidly…

A: To identify whether the given statement represents solid, liquid or gas.

Introduction to chemistry

Chemistry is a branch of science that deals with the analysis of material and the substances that comprise it. It also manages the properties of these substances and their reactions to form new substances. It is basically centered on particles and atoms that make up components and mixtures. These chemical species will in general connect using bonds.