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ANSWERThe molar mass M 2 of non-volatile substance can be calculated from the following formula.P 0 p 0 −p = W 1 ×M 2 W 2 ×M 1 Here, p 0 vapour pressure of acetone and p is the vapour pressure of the solution.M 1 and W 1 are the molar mass and mass of acetone.M 2 and W 2 are the molar mass and mass of a non-volatile substance.Substitute values in the above expression.185185−183 = 100×M 2 1.2×58 HENCE, M 2 =64.38g/mol.Thus, the molar mass of the non-volatile substance is 64 g/mol (APPROXIMATELY).

13Explanation:REFER to the ATTACHMENT

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trochemical cell is a device CAPABLE of either generating ELECTRICAL energy from chemical reactions or using electrical energy to CAUSE chemical reactions.___________☆

The NAME of the GIVEN COMPOUND is pent-2-ene.THANKS!!!

Acidic hydrogen present in ethyne.is correct answer✔but tuamre YAHA tu ye OPTION HAI HI nhi ☹please check your QUESTION mate☺

there is no cure you can only TAKE precuationsExplanation:There is no specific MEDICINE to prevent or treat CORONAVIRUS DISEASE (COVID-19). People MAY need supportive care to help them breathe.

The SHAPE of SUBSHELL will be DU mble. The subshell is 3p.THANKS!!!

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The IUPAC NAME of the SYMMETRICAL KETONE is PENTANONE.

ethyneExplanation:PLEASE FOLLOW me

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No of MOLES(water)=126/18=7 mol  No of moles=VOLUME in liters/22.4  7=Volume in L/22.4 Volume in L=22.4*7=156.8Therefore Molarity=no of moles of solute/volume of solution                                    =1/156.8=0.006377 M (approximate)Please mark it brainliest

The ELEMENTS cerium (CE, ATOMIC no. 58) through lutetium (Lu, atomic no. 71) are commonly known as the lanthanide series.hope it helps ✌✌

The main fertilizer products include: nitrogen fertilizer such as urea, ammonium nitrate, ammonium – calcium nitrate, ammonium SULFATE; phosphate fertilizers such as SINGLE and triple superphosphate, MONO- and diammonium phosphate and potassium fertilizers: potassium CHLORIDE and sulfate.

tion:Thus, for example, one mole of WATER contains 6.02214076×1023 molecules, WHOSE total mass is about 18.015 grams – and the mean mass of one molecule of water is about 18.015 daltons. The mole is widely used in chemistry as a convenient way to EXPRESS amounts of REACTANTS and products of chemical reactions.

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TE YOUR ANSWER ISLet, mole fraction of BENZENE is X1 and that of toluene is X2 We know that, in a solution X1 + X2 =1 As X1 = 0.1 so mole fraction of toluene will be 0.5 So, each mole of the solution will have 0.5 moles of benzene and 0.5 moles of toluene.Now, we have, 1 mole of benzene (C6H6) = 78 gm so, 0.5 mole of benzene = 78 x 0.5 = 39 gmSimilarly 0.5 moles of toluene (C6H5CH3) will be = 92 x 0.5 =46 gmNow we know that weight % = mass of component / total mass of solution x 100Hence weight %age of benzene = 39/ (39 + 46) x100 = 39/85 x 100 = 41.88 %HOPE THIS HELPS ❤️PLEASE MARK AS BRAINLIEST ❤️❤️

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C : O21 × 12 : 16 × 212 : 323 : 8The correct answer is 3 : 8.Hope it helps

e should have a bath at least once every day. It is necessary for teenagers because the increased activity of sweat glands makes the body smelly. All parts of the body should be WASHED and CLEANED everyday. If cleanliness is not maintained there are chances of catching bacterial infection. Girls should take special care of cleanliness during the time of menstrual flow. They should KEEP track of their menstrual cycle and be prepared for the onset of menstruation.because of the presence of adam's apple in the trachea.HIV is a virus that targets and alters the immune system, increasing the risk and impact of other infections and diseases. Without treatment, the infection might progress to an advanced disease stage called AIDS. Abnormal enlargement of the butterfly-shaped gland below the Adam's apple (thyroid).A goitre commonly develops as a result of iodine deficiency or inflammation of the thyroid gland.The changes occur in the stage of adolescents because of the secrection of hormones in our body.Hormones control the changes that occur at adolescence. The male hormone called testosterone is secreted by the testes at the onset of puberty and cause development of FACIAL hair, chest hair etc. At the onset of puberty in girls, ovaries secrete female hormone or estrogen which makes the breast develop.hope this helps you and plzzz mark brainliest

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is is your ANSWER.(NH4)2CO3 :N=14×2 =28H=1×8 = 8C=12×1=12O=16×3=48Molecular MASS = 28+8+12+48 =96 (ANS)

tion:=THIS COMPOUND IS AMONIUM CARBONATE =IF YOU HAVE TO FIND THE MOLECULAR FORMULA OF NITROGEN =YOU HAVE TO ADD THE SUBSTANCE WITH PLUS 10 SO YOU WILL GET YOUR ANSWER I HOPE IT WILL HELP YOU AND PLEASE FOLLOW ME AND MARK ME AS BRANLIST

Na=1so=2h=1is the VALENCE

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i THINK the ANSWER MUST be (d)

fulgkkt you same to you anna PLEASE FIND the ATTACHED file is attached file is scanned and your family and your family and friends you GET a HAPPY New year to you anna HAPPY

The two major types of rainwater harvesting include ROOF based and land-based rainwater harvesting. Rain harvested water can be used for watering livestock, laundry, flushing toilets, etc.Rooftop Rain Water Harvesting is the TECHNIQUE through which rain water is captured from the roof catchments and stored in reservoirs. Harvested rain water can be stored in sub-surface ground water reservoir by adopting ARTIFICIAL recharge techniques to MEET the household needs through storage in tanks.

Magnesium RIBBON must be cleaned before burning in air so that the the layer of magnesium oxide (which is formed due to REACTION of magnesium with air) can be REMOVED in order to GET the desired chemical reaction.

I didnot UNDERSTAND PLEASE can TYPE it once againExplanation:I didnot understand please can type it once again

In second EXPLANATION:MG3N2 + 6H2O → 3Mg(OH)2 + 2NH3 It is the right ANSWER

Explanation:The GASEOUS REACTION A2→ 2A is first order in A2. After 12.3 min 65% of A2 remains undecomposed. How long will it take to decompose 90% of A2? What is the half life of the reaction? Given-1)[A]0=100molL-1 & [A]t= 65, t= 12.3min , k = ? 2) [A]t = 100-90= 10, t=? t1/2=?

The mutual overlap between the half filled s orbitals of two atoms is called s – s overlap and the COVALENT bond formed is known as sigma (s) bond. e.g. formation of HYDROGEN molecule from two hydrogen atoms. s – orbital is SPHERICAL in shape and overlapping TAKES place to some extent in all directionsExplanation: