9. Determine if each of the following sketches is showing a pure sample of an element or a pure sample of a compound. Substance 1 Substance 1 Substance 2 Substance 3 Substance 4 Substance 2 Substance 3 A) pure sample of an element B) pure sample of a compound Substance 4

Q: Is carbon dioxide gas a pure substance? Explain.

A: Yes, the Carbon dioxide(CO2) is a pure substance.

Q: 5)An element cannot A) be part of a heterogeneous mixture B) be part of a homogeneous mixture C) be…

A: Given An element cannot _____________

Q: ?If 35.93 mL of 0.1590 M NaOH neutralizes 27.48 mL of Sulphuric acid, what is the concentration of…

A: question -1 -given values  volume of acid = V1 = 27.48 ml.  volume of base=V2= 35.93 ml conc. of…

Q: TRUE OR FALSE 1. A heterogeneous mixture can be separated into pure substances, but a homogeneous…

A: Mixture  A mixture is the physical combination of two or more substances in which the identities are…

Q: II. Tell whether if the following is an example of solid, liquid or gas. Write S for solid, L for…

A: Since you have posted multiple questions, we will solve only first question for you. If you want any…

Q: Refer to the Chemical Compounds table above. How many total elements are in Ethanol?

A: • Ethanol is an organic chemical compound.    • The functional group in ethanol is -OH (i.e.…

Q: Classify these substances. More than one answer may apply in each case. N2 solution O homogeneous…

A: Element - It is a pure substance made up of only a single atom.  Compound - It is a pure substance…

Q: What is a mixture? A. A solid gold ring B. Nitrogen and oxygen in a molecule C. Copper and lead…

A: A mixture is an homogeneous or heterogeneous solution in which different substances are present in…

Q: Making observations on a substance without changing the chemical makeup of that substance is known…

A:

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

A: This question can be solved using simple subtraction.

Q: Explain this statement in your own words and give an example. The properties of the substances…

A: Every compound is made up of atoms and molecules. The atoms combine in a fixed ratio to give the…

Q: classify to be 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.

Q: why are most things we eat a mixture and not pure substances?

A: Given: Most things we eat is a mixture and not a pure substance To find: Reason for it Solution:…

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: Use the information and models to answer the following questiön. A group of students are trying to…

A: Electrical conductive material are those which can transfer charge from one end to other end.

Q: Is a change in phase a physical change or a chemical change? Explain.

A: A physical change is a reversible change whereas chemical changes are generally irreversible. No new…

Q: Enter a tick mark (/) in the appropriate column to indicate whether the following are properties of…

A:

Q: In the image below, you will see four laboratory spectra for known elements as well as the sample…

A: To determine the chemical composition of unknown, we would check the spectral lines and use the…

Q: 66. Using the picture below, describe the test sample placed in the watch glass. White crystalline…

A: The nature of above compound is decided on the basis of its physical appearance.

Q: 1. Substances that can be broken down into simpler compounds or elements by a chemical change 2.…

A: A compound is a material composed of two or more components. For example Water, carbon dioxide etc.…

Q: A What I have learned? Answer the following questions. 1. Can a physical change occur even if there…

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

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: If you calculated the molar mass of your unknown liquid to be 70.1 g/mol, which of the following do…

A: Given-> Calculated molar mass of unknown liquid =70.1 gm/mole.

Q: What type of pure substance can be decomposed chemically into other pure substances? O compound O…

A: Pure substances are defined as substances that include only one type of particle and have an uniform…

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

A: Given that : Mass of original sample = 2.5429 g Mass of filter paper = 0.5662 g Mass of paper cup =…

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: Brass is a combination of copper and zinc metals. How would you classify brass? Element O…

A: Alloys are the compounds which are made up of two or more metals. The property of a metal can be…

Q: Identify as an element, compound or mixture of compounds

A: Element: Element is a chemical substance which has a single atom and it cannot be broken down in…

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: 62. List the energy conversions that occur in the process from the time water is about to enter a…

A: The law of conservation of energy states that energy can neither be created nor destroyed it can…

Q: Which of the following can be more completely broken down? a) Petrochemicals b) Metals c)…

A: Among the given options, Petrochemical = does not break completely. Metals = does not break.…

Q: 2. Structure E is a form of carbon. What is the name of this structure? A. carbide B. graphite Put a…

A: An element is a pure substance made up of only one kind of atom. The elements can be categorised…

Q: A pure substance is: O composed of two or more regions with different compositions. O composed of…

A: Here we have to define pure substance.

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.

Q: Classify each item as an element or a compound 1. Gas inside a He balloon 2. table sugar 3. Rust…

A: Elements are composed of the same type of atoms whereas compounds are composed of different types of…

Q: Which of the following is a chemical property? A B C D length of a matchstick color of a matchstick…

A:

Q: A mixture is made up of at least two things they are called?

A: A mixture is a combination of two or more substances but they are not combined chemically. They can…

Q: Molecules can be described as O heterogeneous mixtures. O homogeneous mixtures. two or more atoms…

A: (1)The statements that do not describe molecules are given below:Mixtures of two or more pure…

Q: You are given the masses, in grams (g), and the volumes, in cubic centimeters (cm³), for a series of…

A:

Q: Question 16 Which one of the following is a physical change? A. CH4(g) + 2O2(g) → 2H₂O(g) + CO2(g)…

A: For question 16, we have to find the process that indicates a physical change. For question 17, we…

Q: How can you distinguish an element, from a compound, from a solution, from a heterogeneous mixture?…

A: If in a mixture of different compounds there are presence of two or more different phases then the…

Q: Read This! Matter is classified as a pure substance when all of the particles are the identical.…

A: Given : Some models of Compounds are given To find : 5. Pure substances and Mixtures 6. Elements and…

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.