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s of an atom is given by the SUM of the masses of protons and neutrons PRESENT in the nucleus. Since HELIUM atom has a atomic MASS of 4 u and it has TWO protons. Two protons contribute 2 u to atomic mass. Hence, it must contain 2 neutrons.

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A COUPLE of ways. Two come to mind. If you TREAT 2-butene with either 1) a. ozone then b. H2O2 or 2) acidic potassium PERMANGANATE you will form two equivalents of ACETIC acid:CH3-CH=CH-CH3 → CH3-COOH + HOOC-CH3

basic solutions will change red litmus into BLUEAND ACIDIC SOLUTION will remain red distilled WATER there will be few CHANGES in colour or texture.Mark as brainliest

17.33Explanation:HOPE it will HELP U have a NICE DAY

Explanation:Kb = 0.512 K kg mol-1 KF = 1.86 K kg mol-1 ΔTb = 100.18° – 100° = 0.18 ΔT = Kb x molality molality = 0.18/0.512 Now, ΔTf = Kf x molality = 1.86 x  0.18 0.512 0.180.512 = 0.6539 FREEZING POINT of solutions = 0 – 0.6539 = -0.6539Read more on Sarthaks.com - https://www.sarthaks.com/830773/solution-of-urea-in-water-has-boiling-point-of-100-18c-calculate-the-freezing-point-of-the

To determine WHETHER a SUBSTANCE is an acid or a base, count the HYDROGENS on each substance before and after the reaction. If the number of hydrogens has decreased that substance is the acid (donates HYDROGEN ions). If the number of hydrogens has increased that substance is the base (accepts hydrogen ionsExplanation:THANK you

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tion:DefinitionX rays are electromagnetic RADIATION that differentially PENETRATES STRUCTURES within the body and creates images of these structures on photographic FILM or a fluorescent screen. These images are called diagnostic x rays.PurposeDiagnostic x rays are useful in detecting abnormalities within the body. They are a painless, non-invasive way to help diagnose problems such as broken bones, tumors, dental decay, and the presence of foreign bodies. DescriptionX rays are a form of radiation similar to light rays, except that they are more energetic than light rays and are INVISIBLE to the human eye. They are created when an electric current is passed through a vacuum tube. X rays were accidentally discovered in 1895 by German physicist Wilhem Roentgen (1845-1923), who was later awarded the first Nobel Prize in physics for his discovery. Roentgen was also a photographer and almost immediately realized that the shadows created when x rays passed through the body could be permanently recorded on photographic plates. His first x-ray picture was of his wife's hand. Within a few years, x rays became a valued diagnostic tool of ph

(2) On de-excitation to ground state, emittedphoton(s) MAY LIE in infrared or VISIBLE regionExplanation:it is correct

one molecule of carbon monoxide (co ) is MADE of one ATOM of carbon bonded with one atom of OXYGEN.

tion:Mg++ B UNIT of electronegativityMg++ B unit of electronegativityradius of O-- is EQUAL to that of Mg++ B unit of electronegativity is kj/mole C ionic compounds conduct current in solid state D electronic configuration of H+ is 1s°

tion:Considering the same A and B components to FORM a non-ideal solution, it will show NEGATIVE deviation from Raoult's Law only when: ... The solute-solvent interaction is stronger than solute-solute and solvent-solvent interaction that is, A – B > A – A or B – B.

concentated HNO3 renders AL passive DUE to the formation of THIN oxide coating on the surface of the metal which prevents further reaction. therefore conc HNO3 can be transported in Al CONTAINERS.

Caustic SODA is generally prepared by electrolysis of sodium chloride in Castner-kellner cell. A brine solution is electrolyzed using mercury CATHODE and carbon anode. Sodium METAL, discharged at the cathode, COMBINE with mercury to form sodium amalgam. Cl gas is evolved at the cathode.Hope the ANSWER helps you.

ery important to reduce noise POLLUTION SINCE it may cause serious HEALTH problems. Thus, various methods have to be adopted to reduce noise pollution like minimizing the sound coming from T.V., RADIO, ETC., silencing automobiles, creating factories only in industrial areas, planting trees to block the noise etc.

tion:Laboratory synthesis is DONE by reaction of approximately equal masses of any NITRATE salt such as sodium nitrate with 96% sulphuric acid (H2SO4), and DISTILLING this mixture at NITRIC acid's boiling point of 83 °C.

..These elements show variable oxidation state because their VALENCE electrons in two DIFFERENT sets of ORBITALS, that is (n-1)d and ns. The energy DIFFERENCE between these orbitals is very less, so both the energy levels can be used for bond formation. Thus, TRANSITION elements have variable oxidation states.Maybe this can help you

The laws state that (1) the amount of CHEMICAL change produced by CURRENT at an electrode-electrolyte boundary is proportional to the quantity of ELECTRICITY used and (2) the amounts of chemical changes produced by the same quantity of electricity in DIFFERENT substances are proportional to their EQUIVALENT weights

An ACID is a molecule or ION capable of either donating a proton, KNOWN as a Brønsted–Lowry acid, or, capable of forming a covalent BOND with an electron pair, known as a Lewis acid. The first category of acids are the proton donors, or Brønsted–Lowry acids. Acids Bases1. Its TASTE is sour. Its taste is bitter.2. It turns blue litmus paper to red. It turns red litmus paper to blue.3. It contains hydrogen ion (H+). It contains hydroxyl ion(OH-)4. It doesn't feel soapy to touch. It feels soapy to touch

Group 4A (or IVA) of the periodic table includes the nonmetal carbon (C), the metalloids SILICON (Si) and germanium (Ge), the METALS tin (SN) and lead (Pb), and the yet-unnamed artificially-produced element UNUNQUADIUM (Uuq).3 hours agoExplanation:I hope it's helpful for you ☺️

Saturated fatty acids:Fatty acids CONTAIN carbon-carbon single bonds called saturated fatty acids.Examples: stearic ACID (C17H35COOH) & palmitic acid (C15H31COOH)Soaps and detergents are essential to personal and public health. They safely remove germs, SOILS and other CONTAMINANTS and help us to stay healthy and make our SURROUNDINGS more pleasant. Soaps are made from fats and oils or their fatty acids.

since 2-butyne belongs to alkyne SERIES while 2-butene belongs to ALKENE series HOPE that HELPS ✌

An ALCOHOL burner or spirit lamp is a PIECE of laboratory equipment used to produce an open FLAME. It can be made from BRASS, glass, stainless STEEL or aluminium.

Option C is the CORRECT answerExplanation:have a nice DAY and blissful WEEK AHEAD :)

A butene MAY be oxidized in the VAPOR PHASE at ELEVATED temperatures to produce acetic acid by reacting the butene with MOLECULAR

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AnswerCorrect option isACH 3 −CHO (i)NaCN/HCL(ii)H 2 O/H ⊕ /Δ Treatment of acetaldehyde with sodium CYANIDE in presence of HCl gives acetaldhyde cyanohydrin.This is followed by hydrolysis of CYANO GROUP in presence of acid to form hydroxy acid as a product which is 2-hydroxy propanoic acid.

All alkaline Earth metals have similar properties because they all have TWO VALENCE electrons. ... When valence electrons are farther from the nucleus, they are attracted less STRONGLY by the nucleus and more EASILY REMOVED from the atom. This makes the atom more reactive. Q: Alkali metals have just one valence electron.Explanation:

tion:Silicon dioxide is a natural chemical MIX of silicon and oxygen that has uses in many food products as an anticaking agent. Silicon dioxide is generally safe as a food ADDITIVE, THOUGH some agencies are calling for stricter guidelines about the QUALITY and characteristics of the silicon dioxide FOUND in foods.☆☆☆☆☆☆