Is it an element, compound, or no such classification is possible because of insufficient information. 1. Heating substance C to 1000 Celsius causes no change in it. 2. Heating substance D to 500 Celsius causes it to change from solid to a liquid. 3. Analysis with an elaborate instrument indicates that substance A contains two elements. 4. Substance B decomposes upon heat. What are the and why?

Q: Most substances are composed of _________ rather than elemental substances

A: Element:  A substance that cannot be broken down into simpler substances by chemical or physical…

Q: Correct the following statements.a. An element is a combination of two or more compounds.b. When a…

A: Given statements,    a. An element is a combination of two or more compounds.   b. When a small…

Q: P.S. 6. A miner was digging up some ore (rock). The ore contains 84% lead(II) sulfide by mass. How…

A:

Q: Which statement is incorrect?  A. All molecules are compounds but not all compounds are molecules.…

A:

Q: B. Match each diagram with its correct description. Diagrams can only be used once. A В 1. Pure…

A: Elements consist of only one kind of atoms. For example, copper is an element and it is made up of…

Q: A given compound always contains the same proportion (by mass) of the elements. This principle…

A: A compound is formed by the combination of two or more elements through chemical bonding.

Q: Consider these compounds: A. MgCO3 B. Ni(OH)2 C. AgI D. MgF2 Complete the following statements by…

A: A) MgCO3 ⇌ Mg2++ CO32-      Ksp = 1.4 x 10-6B) Ni(OH)2 ⇌Ni2++2OH-       Ksp = 2 x 10-16C) AgI…

Q: A chemical change is a change in composition resulting in a product with different properties.…

A: The objective of the question is to verify the definition of a chemical change.

Q: A physical property is; A) The ability of a sample to undergo change B) A property the sample…

A: We need to give a definition of a physical property based on the fact of change of composition.

Q: What type of process is involved in going from elements to compounds and vice versa? Elements can…

A:

Q: 1. Describe the color of the mercury(II) oxide.   2. Describe what happens to the mercury(II) oxide…

A: Since third question is different than first two question. Here, we solve first 2 questions as they…

Q: tation and fiitra

A: 9) As we know, water and sand is heterogeneou mixture. So it can be separated by decantation. But…

Q: When a candle is lit and allowed to burn for 15 minutes, some wax drips and collects at the base of…

A: (a) When a candle burns the physical change can be easily seen because the solid wax is converted…

Q: Suggest how the components of each mixture can be separated. a. Salt and Sulfur b. Copper and Zinc

A: Solution The mixture of salt and sulphur is a mixture of heterogeneous mixture.They can be seperated…

Q: A sample of stainless steel contains 10.5% chromium by mass. What mass of chromium, in grams, is…

A: Given information,             Stainless steel sample contains 10.5% chromium by mass.…

Q: Which of these is NOT true of chemical changes?

A: Substance can change two ways  1. Physical change  2. Chemical change   we should study major…

Q: What is the term for the property of a substance that cannot be observed without changing its…

A: The property of a substance that cannot be observed without changing its chemical formula is…

Q: 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: List the two types of compounds?

A: Chemical compound is a substance that is composed of identical molecules with atoms of two or more…

Q: 5. A liquid cannot be separated into its components through physical means but can be decomposed…

A: Answer 5. In chemistry, we have elements, mixtures, compounds and solutions. In solutions, we have…

Q: Successively heating a sample yielded the following data. When the student  disposed of the sample…

A: In this case, it is likely that the product began to burn. The oxygen from the atmosphere binding to…

Q: 7. Determine the type of compound (molecular, ionic, or acid) described below. Some may have more…

A: Ionic solids have high melting and boiling point, ionic compounds, generally, composed of metallic…

Q: Are the physical properties of a substance, such as color, sufficient to identify the substance? Why…

A: Physical property: It is a property of a compound that can be observed or measured without changing…

Q: Can the relative amounts of the components of a mixture vary?Can the relative amounts of the…

A: The compound consists of chemically bounded components. While forming a bond there is a fixed ratio…

Q: When elements combine to form a compound are the properties of the elements retained in the…

A: No, the properties are not retained. When elements combine to form compounds, their individual…

Q: 8. A mixture of sand and NH4CI can be separated by method. 9. Define latent heat of fusion. Give its…

A: 8.    Sublimation     Sublimation is the process by which a solid substance on heating converts…

Q: Substance Reaction to flame Phase at room temperature Reaction with water Hydrogen Colorless Gas…

A: Strontium chloride

Q: Copper metal is produced by heating solid copper(II) sulfide with solid copper(II) sulfate,…

A: According to the Law of conservation of mass " all atoms of different elements must be equal on both…

Q: Physical properties are:     those that a substance displays only through changing its composition.…

A: physical properties are the properties that deal with only physical changes or properties of the…

Q: Because composition does not change during a physical change, the appearance of a substance does not…

A: We have to predict whether given statement is correct or not.

Q: During a filtration or distillation experiment, we separate a mixture into its individual…

A: A mixture is a combination of two or more pure substances that retain their chemical identities.  It…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".