H20 C;H12 O2 CO H2O O2 H20 CHs O2 ↑

Q: Here are the four sketches os pure substances.each sketch is drawn as if a sample of rhe substance…

A: Given diagram is :  There are the four sketches of pure substances .each sketch is drawn as if a…

Q: The energy contained in a chemical bond is called the energetics. b. a. energizer. enteric. C. d.…

A: What type of energy contain in chemical bond ?

Q: Is it possible to distinguish between an element and a compound? Explain.

A: Metallurgy is the branch of chemistry that deals with the separation of elements from the compounds…

Q: Define substance and give two examples of things that are substances.

A: The matters are defined as a substance, mixture, element, or compound. Each category of matter…

Q: 39 Which event is an example of a physical change? (1) iron rusting (2) fireworks exploding (4) ice…

A: The changes in the appearance of the substance is called as the physical change. Physical changes…

Q: If a liquid contains 60% sugar and 40% water throughout its composition, then what is it called?

A: There are two types of mixtures:  Heterogeneous mixtures have visually distinguishable components.…

Q: Could the compounds shown below be separated by distillation? Yes or No. Using a sentence, explain…

A:

Q: The distance between the centers of two oxygen atoms in an oxygen molecule is 1.21 x 10 cm . What is…

A:

Q: You are about to work some magic with matter. You have a rectangular cube of matter in its solid…

A:

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: Which one of the following diagrams represents the ground state electron configuration of a nitrogen…

A: Atomic number of nitrogen is 7

Q: 2. { a) Sodium and chlorine are elements. c) Sodium chloride is a pure substance. Which one of the…

A: 1st statement  Sodium and chlorine are elements is a correct statement.   2nd statement Sodium…

Q: Gold is a very soft metal that can be hammered into extremely thin sheets known as gold leaf. If a…

A: The average thickness of the sheet produced from given grams of gold is calculated as shown below

Q: What is the shiny metallic substance coating that form in the walls of the test tube when mercury…

A: The products formed on heating mercury (II) oxide are mercury element and oxygen gas.

Q: Enter either the word "presence" or the word "absence" in the first blank, then the name of the…

A: The salts which are soluble in hot water, remains in the filtrate and one which are insoluble in hot…

Q: Vhich statement about pure substances and molecules is correct? Molecules cannot be pure substances.…

A: molecules are made up of two or more atoms combining in a specific ratio. Pure substances are those…

Q: How is an element different than a compound?

A: Definition- An element is a pure chemical substance made of same type of atom.   A compound contains…

Q: la. Diamond, graphite, and copper have very different properties but are made of networks of atoms.…

A: Metals have a shiny surface and a high melting point.

Q: Every year Jeff Bezos sells 5 billion dollars worth of Amazon stock to fund his commercial space…

A: 5 billion dollars = 5,000,000,000 dollars I had a job making 250 dollars an hour So, total hours I…

Q: Rank the following acids from least to most acidic. (Start with the least acidic as 1) Br Br. HO Br

A:

Q: Cite the evidence that indicates that only physical changes occur when a platinum wire is heated in…

A: Physical change means any kind of change of a substance's form like size, colour etc. without being…

Q: A student ran an paper chromatography experiment to compare the compound A with known compound of B,…

A:

Q: product structures, draw the curved electron-pushing arrows for the following reaction. Be sure to…

A:

Q: <ey

A: The question is based on the concept of organic synthesis.We need to synthesize the product using…

Q: Write the following in Standard form

A: Standard form is used for writing very large numbers or very small numbers

Q: Is pure 24-carat gold a substance, element, and/or compound? Explain.

A: 24-carat gold an element. It can be also reffered to as pure substance. It contains only the gold…

Q: CFCs break down to form chemicals that react with ozone. Is this a macroscopic or a microscopic…

A: CFCs break down to form chemicals that react with ozone. Is this a macroscopic or a microscopic…

Q: NO₂

A: Determine the number of valence electrons: The number of valence electrons can be determined from…

Q: Which substances are molecular substances? water in glass ice in glass motor oil mineral spirits…

A: Here we have to determine the following materials which are molecular substances

Q: the melting point of sugar the reactivity of ocopper with axygen the flammability of ethanol the…

A: Physical property :-  Property which can be measured without changing the chemical composition and…

Q: Which of these are pure substances? L Steam II Crude oil II. Salt water IV. Gun powder V. Oxygen VL…

A: Since you have asked multiple questions, as per our guidelines,we are supposed to answer only one…

Environmental Pollution

Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.