Select all the elementary substances. cobalt (Co) phosphorus tribromide (PBR3) tungsten carbide (WC) ferrous oxide (FeO)

Q: In the smelting of iron ores, the reduction of iron oxides in a blast furnace is accompanied by the…

A: A multiple choice question based on chemical thermodynamics that is to be accomplished.

Q: Part A Choose a ratio showing the relationship between the amounts of each element for each of the…

A: • Part A :           •   Correct option is   3O : S  Here three fragments are present. Each fragment…

Q: Why are group 17 elements more reactive than other elements

A: Periodic table is an assembly of elements,in which all the elements are arranged according to their…

Q: Predict the products of the reaction below. That is, complete the right-hand side of the chemical…

A: The objective of the question is to predict the products of the given chemical reaction and ensure…

Q: Which balanced chemical equation below corresponds to the law of mass action expression: [A]²[C]…

A: The question is based on the concept of law of mass action. we need to write proper equation for law…

Q: Why does the following reaction take place B₂O₃ + 3Mg → 3MgO + 2B   Does it have to do with the…

A: Answer:- This question is answered by using the simple concept of chemical reaction metals ands and…

Q: Since the rate of ozone destruction depends on [Cl], can Cl be considered acatalyst for the reaction…

A: CFC molecules are made up of chlorine, fluorine and carbon atoms and are extremely stable. This…

Q: The earliest Earth had an atmosphere loaded with CO2 in an intense greenhouse climate. Explain where…

A: Carbon dioxide is a colourless substance with a density nearly 53 per cent greater than that of dry…

Q: The conjugate acid of HSO4 is... O Sulfuric acid O Sulfite O Sulfate Sulfurous acid

A: A conjugate acid base pair differ by only one proton

Q: O MATERIAL/COMPOUND TESTED Copper(II) Oxide Potassium Nitrate Cobalt(II) Chloride Strontium Chloride…

A: As per the rules, only the first question (table) can be answered. For answers to the second table,…

Q: Vhen water is mixed with a metal hydroxide is formed and mydrogen gas is evolved. * Bases D Metals D…

A: When metal reacts with water, it produces metal hydroxide and liberates hydrogen gas.

Q: What forms when the oxides of pollution react with water? O acid rain O carbon dioxide O kerogen

A: The sulphur oxides and nitrogen oxides are common oxides which causes pollution.

Q: Define the term Halogens?

A: The term Halogens has to be defined below.

Q: In 1995, Mario Molina, Paul Crutzen, and F. SherwoodRowland shared the Nobel Prize in chemistry for…

A: Redox reaction- the reaction in which oxidation and reduction takes place simultaneously called as…

Q: Which one of the following compounds is chromium (X) oxide? O Cr2010 O Cr100 O CrO5 O Cro

A: IONIC COMPOUNDS: When charged particles or ions combine to form a chemical compound, it is called as…

Q: Chapter 7 Worksheet Student Name: Research Questions: 1) Which element is the most reactive in the…

A: The provided worksheet addresses research questions and experimental observations related to the…

Q: You are told by your instructor to go to the stock room and find a bottle of the chemical K3Cl. Does…

A: K is potassium, element of group 1 of periodic table with 1 valence electron And Cl is chlorine,…

Q: The compound iron chloride can exist with either iron(II) ions or iron(III) ions. Conduct Internet…

A: Check the formula for each compound. Check its colour and write down its uses.

Q: Based on the nature of reactants and products, determine which of the following potential energy…

A: To determine the nature of the reaction i.e Exothermic or endothermic based on the potential diagram…

Q: The depletion of ozone is particularly serious at Earth's poles because Multiple Choice polar "ice…

A: ozone layer present in the earth’s stratosphere that consist of  high concentrations of ozone which…

Q: Predict the products of the reaction below. That is, complete the right-hand side of the chemical…

A: When an acid react with an base , salt and water are formed this type of reaction is called…

Q: What is the most reactive metal to least reactive metal out of: Zinc Tim  iron  magnesium…

A: Metals are good conductor of heat and electricity for example: aluminium, copper whereas non metal…

Q: What is the balanced equation of SO2 + O2 > SO3

A: A balanced reaction is defined as a reaction in which the atoms present on the reactants side is…

Q: 23. Using the following thermochemical equations: 2 SO,(g) →2 SO,g) + 0,(g) ΔΗ TXn 1 = +198 kJ/molm…

A: Given,

Q: Why is lead(Pb) connected with chemistry and biology?

A: Lead (Pb)  is a heavy metal with an atomic number of 82 with an electronic configuration of…

Q: Which one of the following atoms can form a molecular compound with oxygen? chlorine iron calcium…

A: Answer:When atoms from more than one element combine together to form a stable molecule then such…

Q: Consider the following series of balanced chemical reactions in the production of potassium…

A: Since 1 moles of K2SO4 is producing 1 mole of K2S hence moles of K2S = moles of K2SO4 reacting Now…

Q: find the molar mass of tooth enamel the chemical name is  Hydroxyapatite   - [ Ca3(PO4)2]3Ca(OH)2

A: Calculating molecular weight by putting atomic weight of elements in compounds.

Q: Write the equation for the formation of calcium hydride. 5.

A: Solid Calcium react with Hydrogen gas at 350 oC to formed Calcium Hydride.  Ca (s) + H2 (g)…

Q: Predict the products of the reaction below. That is, complete the right-hand side of the chemical…

A: The objective of the question is to predict the products of the given chemical reaction and ensure…

Q: What hazards are associated with lead metal? Decrease size of red blood cells. Decrease number of…

A: Lead, a versatile metal, has been utilized throughout history for various applications, ranging from…

Q: HS M

A: To name the given compound, the numbering of the carbon chain of the compound is quite necessary.…

Q: The reaction between ammonia and oxygen is given below: 4 NH3(g) + 5 02(9) - 4 NO(g) + 6 H20(g) We…

A:

Q: (24) Br H20 2. Br Br Br o 3.

A: Alkene reacts with bromine and water to form beta bromo alcohol. The reaction follows the…

Q: Balance the following chemical equation (if necessary): Na(s) + H2O(I) –→ H2(g) + NaOH(aq) 1 2 4 5 6…

A:

Q: Write the balanced chemical equation for the conversion of pure magnesium metal to magnesium oxide.…

A: In a chemical reaction, the reactant converted to the product under suitable conditions with or…

Q: 3. Write the reaction of calcium with cold water. Write the equation for the formation of lithium…

A: Calcium is a reactive metal and it is reactive enough that it can react with cold water.

Q: The reaction between ammonia and oxygen is given below: 2 NH3(g) + 2 O2(g)  N2O(g) + 3 H2O(l) We…

A: If the reaction is reversible, the reverse reaction can also occur.

Q: Listen Balance the equation CgH187) + O₂(g) → CO₂(g) + H₂O(g) - E

A:

Q: Group 14 elements and their compounds show a wide range of reactivity, SiH4 and CH4 both compounds…

A: SiH4 and CH4 exhibiting different chemical reactivity, which has to be explained.

Q: Write the chemical reactions on group 3 cations

A: The species having positive charge are termed as cations.

Q: What is the main source of pure nitrogen? Air Water O Dirt Plants

A: We have been asked the main source of nitrogen and  we also have been given four options air, water,…

Q: If heated to around 900°C, calcium carbonate undergoes decomposition. What are the products for this…

A: In a chemical reaction, one or more reactants are converted in to one or more products. There are…

Q: The compound iron oxide can exist with either iron(II) ions or iron(III) ions. Conduct Internet…

A:

Q: Addition of sulfanilic acid and alpha-naphthylamine changes the color nitrate ions from colorless to…

A: Nitrate reductase

Q: Select the best possible products for the given reaction. Don't worry about balancing. Na₂O + H₂O -…

A: The best possible product for the reaction : Na2O + H2O ---> ?

Q: Predict the products of the reaction below. That is, complete the right-hand side of the chemical…

A: Given -> HI + NaOH ---->  -> When acid reacts with water it form salt and water as products…

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.