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I don't know the 1 and 2 but 3 the substance is PHOSPHORUS and the combustion is SPONTANEOUS combustion

fuelsAl(OH)3.Annealingfourethylene or ETHENE( ◜‿◝ )♡ HOPE that HELPS YUH

what is p-block ELEMENT

a, there are several states and cities which are extremely polluted, but while the lockdown PERIOD, the quantity of pollution has DECREASED very much. The day's in lockdown have DONE a favour in healing the ozone LAYER. While there is no ECONOMIC growth in the country, there are results also that may help everyone learn during the lockdown. We will learn about how to stay distanced but all unitedly as a group. Let's stay protected in our country and stop this disease before it grows into an endless condition.

1) False2) FALSE3) TRUE4) False5) True6) TrueHope it will help you MARK the BRAINLIEST

Answer:the SHAPE of the ice CUBE would be disturbed and the ice would MELT EASILY

here is UR ans.. ✌️The atoms of only a few elements called NOBLE gases (Such as HELIUM, neon, argon and kryton, etc.) are chemically unreactive and exist in the free STATE or independently. Atoms of most of the elements are chemically very reactive and do not exist in the free state or independently.hope it helps

missible liquids are liquid which MIXES COMPLETELY LIKE water and alcohol and imiscible liquids are liquids which do not mix and makes LAYERS like iol and water

that an element CONTAINS (oh) it is a basenaoh - sodium hydroxidekoh-  potassium hydroxideca(oh) - CALCIUM hydroxidenh4oh- AMMONIUM HYDROXIDE

These are very HARD except SODIUM These are malleable and ductile  These are SHINY ELECTROPOSITIVE in NATURE Nonmetals These are soft except diamond These are brittle and can be breakdown into pieces These are non-lustrous except iodine Electronegative in nature

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Helium at 500k temperatureExplanation:To understand the relationship of gas DIFFUSION with molar MASS, we studt Graham's Law Graham's Law which stated that diffusion of gas is INVERSELY proportional to molar mass, since Bromine has more molar mass it will diffuse slowly.Now mass of helium is 4 while that of argon is 40, means helium is 10 times lighter than argon. Also diffusion will be faster at higher temperatures.As per given condition, MAXIMUM SPEED will be observed with Helium at 500k temperatureLearn more about Graham's Law;brainly.in/question/16638381

ercury is PRESENT in cinnabar.mark me as BRAINLIEST PLZ.....

a-precipetate SOLUTION

Pb₃O₄ + 8HCl ⇒ 3PbCl₂  +  Cl₂ + 4H₂0​Here OXIDIZING agent is Pb₃O₄ because it is getting reduced to PbCl₂ and oxidizing HCl to H₂O.​HOPE THIS HELPS YOU......PLZ MARK AS BRAINLEST..........

tion:A chemical substance is a form of matter having constant chemical composition and characteristic PROPERTIES. Some REFERENCES add that chemical substance cannot be separated into its CONSTITUENT elements by physical separation METHODS, i.e., without BREAKING chemical bonds.Mark my answer as BRAINLIEST

r goes UNDERGOES reduction and hydrogen OXIDISES. 2.Zinc reduces and silver OXIDES. 3.potassium oxidises and hydrogen reduces. 4.calcium oxidises and hydrogen reduces. 5.Aluminum reduces and COPPER oxidses.

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I don't know MEIN, I will be a problem with the new ONE, but the problem with this list of the FOLLOWING is the meaning utilise the, and the other hand

tics is Antipyretic ...hope it's HELPS you ...MARK BRAINLIST ANSWER ...THANK you ...

¹⁶O₈ = OXYGEN - 16¹⁷O₈ = OXYGEN - 17¹⁸O₈ = OXYGEN - 18HOPE THIS HELPS YOU.........PLZ MARK AS BRAINLEST........

odern periodic lawthe chemical and PHYSICAL PROPERTIES of elements are a periodic function of their ATOMIC numbersthe classification of elements RESULTING from an arrangement of the elements in an increasing order of their atomic numbers is the MODERN periodic tableplz thankmark brainliestfollow

At other times you'll need a measuring cylinder, and sometimes you may need a ... Note the ADVANTAGES and disadvantages of each method and explain your ... in a reaction between calcium carbonate and hydrochloric ACID you could collect ... a mean and one result APPEARS very DIFFERENT (called ANOMALOUS) .Explanation:

te Here is your ANSWER:-ANSWERConcentration of NaOH=10% w/wLet there be 100 g of SOLUTION, then mass of NaOH=10 gMoles of NaOH=4010=0.25 molesMass of WATER =100−10=90 gMoles of water =1890=5 molesMole fraction of NaOH=5.250.25=0.0476I hoo this will HELP you❤️❤️

teHere is your answer:-The ore is first converted into pure ALUMINUM OXIDE by the BAYER Process.And then it is EXTRACTED by electrolysis.I hope this will help to you❤️❤️

tion:Family of Salt : Acid Base & Salt-class 10 science Salts BELONG to sodium family: All salts having sodium ions as positive radical belong to the same family, i.e. sodium family. For EXAMPLE: sodium CHLORIDE, sodium SULPHATE, sodium nitrate, etc.hope it's help u plz mark me a s BRAINLIST and follow me

the PIC is not CLEAR PLS can U POST it again

Reactivity of Alcohols. The FUNCTIONAL GROUP of the alcohols is the HYDROXYL group, –OH. Unlike the alkyl halides, this group has two reactive covalent bonds, the C–O bond and the O–H bond. The ELECTRONEGATIVITY of oxygen is substantially greater than that of carbon and hydrogen

tion:Plastics are used widely everywhere in our life and without plastic, modern civilization would indeed LOOK very diverse. This study focuses on the toxic effects of plastic on human health and environment and POSSIBLE consequences of health risk assessment in Bangladesh. Plastics are essential materials in modern civilization, and many products manufactured from plastics and in numerous cases, they promote risks to human health and the environment. Plastics are contained many chemical and hazardous substances such as Bisphenol A (BPA), thalates, antiminitroxide, brominated flame retardants, and poly- fluorinated chemicals etc. which are a serious risk factor for human health and environment. Plastics are being used by Bangladeshi people without knowing the toxic effects of plastic on human health and environment. Different human health problems like irritation in the eye, vision failure, breathing difficulties, respiratory problems, liver dysfunction, cancers, skin diseases, lungs problems, headache, dizziness, birth effect, reproductive, CARDIOVASCULAR, genotoxic, and gastrointestinal causes for using toxic plastics. Plastics occur serious environment pollution such as SOIL pollution, water pollution, and air pollution. Application of proper rules and regulations for the production and use of plastics can reduce toxic effects of plastics on human health and environment.hope it helps.pls mark as brainliest

m=2.94Explanation:KINDLY CHECK the UNITS

lpy change of a reaction is calculated as: Σbond enthalpy of reactants- Σbond enthalpy of productso The standard molar enthalpy of FORMATION (for one mole) ΔfHΘ is given for NH3 = – 91.8 kJ mol–1 which is associated with the reverse exothermic reaction N2(G) + 3H2(g) → 2NH3(g) i.e. heat released INFORMATION of AMMONIA is – 91.8 kJ mol –1.Hence, for the decomposition 2NH3(g) →N2(g) + 3H2(g) ΔrHΘ will be =- (– 91.8 kJ mol–1 ) = + 91.8 kJ mol–1 .And in this case for 2 moles of NH3 enthalpy change of the reaction will be ΔrH = (2 X 91.8 ) = 183.6 kJ mol–1 .

Beets, BLACKBERRIES, GRAPE juice, plums, turnip skin, and more all act as an edible natural pH indicator. They all have anthocyanin in them which makes the solution change color, but they also DIFFER in that little side groups attached to the main molecule cause the color changes to vary between foodsExplanation:HOPE It Helps You Mark It Brainliast And Follow Me ✌ ✌

lytic substances are classified as strong or weak according to how readily they dissociate into conducting ions. Acetic acid is a weak ELECTROLYTE. GLUCOSE, ethanol and UREA are non-electrolytes.Explanation:I THINK IT IS HELPFUL FOR ALLMARK TIS AS BRAINLIST ANSWERS

Some examples of physical properties are:1 ) color (intensive)2)DENSITY (intensive)3 )volume (extensive)4 )MASS (extensive)5 )boiling point (intensive): the temperature at which a SUBSTANCE boils.6 )melting point (intensive): the temperature at which a substance melts.I hope it may help you.Please may me as BRIANLIEST.

n air is FORMED inside a balloon it expands in size . 2. a PACKET of chips swells up in the mountains this SHOW that ATMOSPHERIC pressure at higher altitude is very less in comparison with the pressure inside the chips packet with GAS of normal pressure.Explanation:I HOPE IT IS HELPFUL FOR ALL MARK THIS AS BRAINLIST ANSWER

the milk was WARM because the PLASTIC and the cloth trapped the HEAT energy

a) All of thesehope it HELPS you

bekar BECOMES hot in inference quicklime calcium hydroxide and RELEASED LARGE amount of heat it is example of COMBINATION reaction as well as an exothermic reaction. ❣️❣️❣️

The IUPAC system uses the name of the parent alkane with a prefix indicating the halogen substituents, preceded by number indicating the substituent's location. The PREFIXES are FLUORO-, chloro-, bromo-, and iodo-. THUS CH 3CH 2CL has the common name ethyl chloride and the IUPAC name chloroethaneExplanation:

hat,Pressure of container P = Temperature of container P = 300 KPressure of container Q = Temperature of container Q = 400 KThe volume of Q is four times the volume  of P.We NEED to CALCULATE the VALUE of mUsing FORMULA of number of molesPut the value into the formulaHence, The value of m is 2.7

e here your answer ...a. 2P b. 4d^2c.3pd.4pe.3d^2 HOPE it's helps you ...MARK BRAINLIST answer ...