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In chemistry and physics, a valence electron is an outer shell electron that is associated with an ATOM, and that can participate in the formation of a CHEMICAL bond if the outer shell is not closed; in a SINGLE covalent bond, both atoms in the bond contribute one valence electron in order to form a shared PAIR.

Calcium carbonate is heated strongly until it UNDERGOES THERMAL decomposition to FORM calcium oxide and carbon dioxide. The calcium oxide (unslaked lime) is dissolved in water to form calcium HYDROXIDE (limewater). Bubbling carbon dioxide through this FORMS a milky suspension of calcium carbonate.Explanation:hope it's can hep you

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tion:specific GRAVITY of BENZENE is 0.88specific gravity=(density of substance)/(density of water at 4°C)Let density of benzene= X⇒0.88= X/1      [density of water at 4°C= 1 gm/ml]⇒X= 0.88Density of benzene = 0.88 gm/mlMass = Density × Volume⇒MASS= 0.88 gm/ml × 1000 ml⇒mass=880 gmMolar mass of benzene= 72 + 6                                        = 78Moles of benzene= 880 gm/ 78 gm                               = 11.282 MOLES1 moles ⇒ 6.022 × 10^23 molecules11.282 moles ⇒ 11.282 × 6.022 × 10^23 molecules                        =6.79 × 10^24 moleculesanswer: 6.79 × 10^24 molecules

Some people ADD salt to the hand sanitizer, which CAUSES the alcohol to separate from the other gel to distil the alcohol back into its LIQUID form. Some teens mix hand sanitizer, Listerine and salt together for a "hand sanity fix," also known as Mr.Explanation:hope its help youplease guys give THANKS

25% is order by in 30 MINUTES. and this 90% is order by in 1 hours 14 to 16 minutes

there are two ELECTRONS PRESENT in a NEUTRAL helium atomExplanation:mark breanliest rate FOLLOW and thanks

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At the back of your eye, there are rods and CONES that sense the amount or intensity of light. You have 3 DIFFERENT types of cones in your eye which sense RED, blue and green light. When red, blue and green light are mixed (added) together in different AMOUNTS, you will perceive different colors

Reaction occurs as the FOLLOWING:Na2CO3 + 2HCl → 2NaCl + CO2 ↑+ H2OTo make it more informative we can add the following statement-As we add pinch of sodium cabonate into dilute hydrochloric acid strong effervescences are OBSERVED which are due to EVOLUTION of CARBON DIOXIDE.

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tion:Hope it HELPS, PLEASE Mark as the BRANLIEST.

tion:(a) All THREE components on the FILTER paper with one on another.(b) The technique used by the child is known as Chromatography which is used for seperation of substances on the basis of COLOURS.(c)It is used to SEPARATE Colours in a dye Pigments from natural colours Drugs from Blood.Hope it Helps,Please Mark as the BRANLIEST.

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it is above 20% and below 50%EXPLANATION:it is above 20 % and below 50%

GravitationExplanation:HOPE IT WILL HELP U IN YOUR STUDIESPLEASE PLEASE FOLLOW MESTAY HOME STAY SAFE

It is the PROCESS of CLEANING WATER or ANYTHING.

The THREE most stable ISOTOPES of hydrogen: protium (A = 1), deuterium (A = 2), and tritium (A = 3). Protium, the most COMMON ISOTOPE of hydrogen, consists of one proton and one electron. ... A deuterium atom contains one proton, one neutron, and one electron.Explanation:

Hi dude I have two answer for your question:(1) tetraammineaquabromoiodocobalt(III) nitratewe have to follow alphabetical order for ligands after that METAL name, its OXIDATION STATE in bracket then anion.ans second is (2) bromo iodo aquatetramincobalt3 nitrate.Explanation: Hope it helps you please follow, LIKE and RATE the answer.

The magnetic separation is a process in which magnetically SUSCEPTIBLE material is extracted from a MIXTURE using magnetic force. This is best WAY to separate the mixture of sand and iron FILLINGS as iron is attracted by magnet.Please MARK me as brainliestThank you and have a nice day

D) N and PExplanation:N and P are of same GROUP and the CHEMICAL behaviour of ELEMENTS depends on their  electronic config

By far the most abundant VOLCANIC gas is water vapor, which is HARMLESS. However, SIGNIFICANT amounts of carbon dioxide, sulfur dioxide, hydrogen sulfide and hydrogen halides can also be EMITTED from volcanoes.Kindly mark me as brainliest..

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Smog, the primary constituent of which is ground LEVEL OZONE, is formed by a chemical reaction of carbon MONOXIDE, nitrogen oxides, VOCS, and heat from sunlight. ... The main sources of nitrogen oxides are electric utilities, motor vehicles, and industrial plants.

l Properties of MetalsThe density of metals is USUALLY high.Metals are malleable and ductile.Metals FORM an alloy with other metals or NON – metals.Some metals react with AIR and corrode.Metals are good conductors of heat and ELECTRICITY. Generally, metals are in a solid state at room temperature.

ᴏғ ᴄᴏɴsᴇʀᴠᴀᴛɪᴏɴ ᴏғ ᴍᴀss ᴅᴀᴛᴇs ғʀᴏᴍ ᴀɴᴛᴏɪɴᴇ ʟᴀᴠᴏɪsɪᴇʀ's 1789 ᴅɪsᴄᴏᴠᴇʀʏ ᴛʜᴀᴛ ᴍᴀss ɪs ɴᴇɪᴛʜᴇʀ ᴄʀᴇᴀᴛᴇᴅ ɴᴏʀ ᴅᴇsᴛʀᴏʏᴇᴅ ɪɴ ᴄʜᴇᴍɪᴄᴀʟ ʀᴇᴀᴄᴛɪᴏɴs. ɪɴ ᴏᴛʜᴇʀ ᴡᴏʀᴅs, ᴛʜᴇ ᴍᴀss ᴏғ ᴀɴʏ ᴏɴᴇ ᴇʟᴇᴍᴇɴᴛ ᴀᴛ ᴛʜᴇ ʙᴇɢɪɴɴɪɴɢ ᴏғ ᴀ ʀᴇᴀᴄᴛɪᴏɴ ᴡɪʟʟ ᴇǫᴜᴀʟ ᴛʜᴇ ᴍᴀss ᴏғ ᴛʜᴀᴛ ᴇʟᴇᴍᴇɴᴛ ᴀᴛ ᴛʜᴇ ᴇɴᴅ ᴏғ ᴛʜᴇ ʀᴇᴀᴄᴛɪᴏɴ.࿇ ══━━━━✥◈✥━━━━══ ࿇ HOPE it HELPS you❤️❤️

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Here's what I got. EXPLANATION: !! EXTREMELY LONG ANSWER !! You're titrating HYDROCHLORIC acid, HCl , a strong acid, with SODIUM hydroxideExplanation:

the NUMBER of PROTONS is EQUAL to number of ELECTRONS

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1A.You then add the word "hydrate" to the prefix to give the complete hydrate name. For the formula given above, it's hydrate name is calcium chloride dihydrate. The prefix "di" is used because it has two water molecules. ... What Is the Hydrate Chemistry Naming System? Number of H20 molecules Prefix 10 deca-2A.A substance is anhydrous if it contains no water. Many processes in chemistry can be impeded by the presence of water, therefore, it is important that water-free reagents and techniques are used. In practice, however, it is very difficult to achieve perfect dryness; anhydrous compounds gradually absorb water from the atmosphere so they must be stored carefully.Table salt is anhydrous sodium chloride (NaCl). Gaseous HCl is anhydrous, which differentiates it from hydrochloric acid, a solution of 37 percent HCl in water (w/w). Heating copper(II) sulfate pentahydrate (CuSO4·5H2O) yields anhydrous copper(II) sulfate (CuSO4).3A,Drying agents (also called desiccants) come in various forms and have found widespread use in the foods, pharmaceuticals, packing, ELECTRONICS and many manufacturing industries. Commonly used drying agents in organic laboratories are calcium chloride (CaCl2), sodium sulfate (Na2SO4) calcium sulfate (CaSO4, also known as Drierite) and magnesium sulfate (MgSO4), all in their anhydrous form Their efficiency is measured by intensity, capacity and velocity can greatly vary from one solvent to the other. 1. Calcium chloride (n=6, e=1.5 mg/L) is a very good drying agent for a broad variety of solvents but is generally not compatible with hydroxy (alcohol, phenol), amino (amine, amide) and carbonyl (acid, ketone, ester) functions due to basic impurities such as Ca(OH)2 and CaCl(OH). In addition, it tends to form adducts with some of those compounds as well. It is often used in drying tubes because it also is available in granular form. 2. Calcium sulfate (n=0.5, e=0.004 mg/L) is a neutral and good drying agent. However, it does not have a high capacity, which makes it useless for very wet solutions. The commercially available Drierite®  contains about 2 % cobalt chloride as indicator, which can be leached out into various solvents i.e. ethanol, DMSO, DMF, ethers, etc. Drierite is often used in desiccators. If the compound is pink, the water can be removed by heating the compound to 210 oC for an hour. Drierite Dry (blue)                                       Wet (wet) 3. Magnesium sulfate (n=7, e=2.8 mg/L) is a slightly acidic drying agent. It works well in solvents like diethyl ether, but not as well for ethyl acetate. It is a fast drying agent, in part because it comes as a fine powder with a large surface AREA. 4. Sodium sulfate (n=10, e=25 mg/L) has a very high capacity and is mainly used for very wet solutions. It is very efficient in ethereal solutions, but it also absorbs other polar compounds like alcohols, etc. In addition, it is slower COMPARED to magnesium sulfate, etc. 5. Potassium hydroxide (KOH, n= high, e=0.1 mg/L) and potassium carbonate (K2CO3, n=2, e=moderate) are both of basic nature and often used to dry basic solutions containing amines. They cannot be used to dry acidic compounds since they react with them. 6. Sulfuric acid (H2SO4, e=0.003 mg/L) and phosphorous pentoxide (P4O10) are both acidic drying agents that are mainly used in desiccators and not in DIRECT contact with the solution since they are very aggressive reagents. Both have a very high capacity. Sulfuric acid forms hydrates while phosphorous pentoxide is ultimately converted into PHOSPHORIC acid. P4O10 + 6 H2O  ----- >  4 H3PO4 7. Molecular sieves are alumino silicates with a three-dimensional network with different pore sizes (3-5 Å). They have to be activated prior use and also can be regenerated at higher temperatures (~180 oC - 260 oC, 1-2 hours). ______________table_____________________________      Class of Compounds Recommended Drying Agent __________________________________________Alkane, alkyl halides MgSO4, CaCl2, CaSO4, H2SO4, P4O10 Aromatic hydrocarbons, ethers MgSO4, CaCl2, CaSO4, P4O10, Na-metal Aldehydes, ketones, esters Na2SO4, MgSO4, K2CO3, CaSO4 Alcohols MgSO4, K2CO3, CaSO4, CaO, BaO Amines KOH, K2CO3 Acidic compounds Na2SO4, MgSO4, CaSO4 __________________________________________________________Explanation:hope it is helpfulpls mark me as brainliest pls

j.j Thomson has DISCOVERED the ELECTRON through cathode ray tube methodhope it helps you PLEASE MARK me BRANLIEST

i think HOMOGENEOUS mixture..PLEASE follow me . and MARK me as BRAINLEAST answer.also thanks my answers.

Here's what I got. EXPLANATION: !! EXTREMELY LONG ANSWER !! You're titrating hydrochloric ACID, HCl , a strong acid, with SODIUM hydroxideExplanation:

tion:By INTERNATIONAL agreement, absolute zero is defined as precisely; 0 K on the KELVIN scale, which is a thermodynamic (absolute) temperature scale; and –273.15 degrees CELSIUS on the Celsius scale

As part 'A' is heated, a compound FeS is formed by the reaction between iron filings and sulphur. When dilute HCI is ADDED to part A, FeS will react with dil HCI to form H2S GAS which has smell of rotten eggs and will turn lead acetate paper black. ... When dil, HCI is added to it, iron filings react with dill.Explanation:HOPE this is USEFUL for you