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48801.

Four ways of determining melting points of products

Answer»

❥ The most COMMON and most basic method of determination is the CAPILLARY method. This method involves PLACING the sample in a capillary tube and running an experiment that will heat the sample until it reaches melting point. The melting point can then be recorded.Explanation:"I hope it's HELPFUL for you"

48802.

What happen when microwave energy heats sample?​

Answer»
48803.

What is PFF? How would you prepare it?​

Answer»

there are many FULL forms of PFF which ONE do u NEED

48804.

What are two principal means of dissolving inorganic materials?​

Answer»

The physical processes that influence oxygen distributions INCLUDE, in particular, the large-scale replenishment of oceanic bottom waters with cold, dense, oxygen-rich waters sinking toward the bottom from high LATITUDES. Due to the release of nutrients that accompanies the consumption of oxygen by BIOLOGICAL debris, DISSOLVED oxygen concentrations generally appear as a mirror image

48805.

Why is the paraffin liquid stirred constantly?​

Answer»

The surface TENSION of the bath liquid is sufficient to hold the capillary TUBE in position. HEAT the BEAKER slowly while constantly stirring the contents using a stirrer to maintain a uniform temperature THROUGHOUT.

48806.

In which of the following sets is the symbol of the element, the number of protons, and the number of electrons given correctly? A. In, 49 protons, 49 electrons B. Zn, 30 protons, 60 electrons C. F, 19 protons, 19 electrons

Answer»

it is very TOUGH QUESTIONS but I can't FIND it

48807.

List the general rules for the use of balance?​

Answer»

Only GLASS, CERAMIC, metal or plastic objects and containers should be placed in direct CONTACT with the balance pan. Do not handle objects to be weighed with bare hands. Moisture, grease and dirt on you fingers will affect the weight of the objects. To be weighed accurately, all objects MUST be at room temperature.

48808.

Explain Weighing by difference?​

Answer» WEIGHING by DIFFERENCE is a way to weigh MATERIALS accurately. The WEIGHT of the MATERIAL is the difference between the two weights of the vial before and after you transfer the material from the vial.
48809.

Please answer this chemistry question if u know please answer don't write unnecessary answers​

Answer»
48810.

Explain Why is microbalance more sensitive than an analytical balance?​

Answer»
48811.

„X‟ is a mixture of iron fillings & Sulphur & „Y‟ is a product obtained by heat the mixture „X‟ & crushing it to fine powder. When both „X‟ & „Y‟ are dissolved in Carbon disulphide, what will happen?

Answer»

nch of science concerned with the SUBSTANCES of which MATTER is composed, the investigation of their properties and REACTIONS, and the use of such reactions to form NEW substances.

48812.

If a mixture of manganese (IV) oxide and MnO2 is heated which among the two compounds will produce oxygen?

Answer»

in this REACTION of Mg2O4 + MNO2. MnO2 will PRODUCE OXYGEN

48813.

the freezing point of water is 0degree Celsius while its boiling point is 100 degree Celsius its physical state at 120 degree will be?

Answer»

gas as above 100 degree WATER CHANGES to water vapourwe can also say it as STEAM

48814.

Write the limitations of bhor model of atom

Answer»

The BOHR MODEL is very limited in terms of size. Poor spectral predictions are obtained when larger ATOMS are in question. It cannot PREDICT the relative intensities of spectral lines. It does not EXPLAIN the Zeeman Effect, when the spectral line is split into several components in the presence of a magnetic field.

48815.

Please answer this chemistry question if u know please answer don't write unnecessary answers​

Answer»

Here is the solutionExplanation:Given that Mass of propane =8.8 gNumber of MOLES = molar massmass = 448.8 =0.2 molNow,C 3 H 8 + 5O 2 ⟶ 3CO 2 + 4H 2 O1 mole of propane requires 5×{22.4} litre O 2 .So, 0.2 mole propane requires 5×{22.4}×{0.2} = 22.4 litre O 2

48816.

Tell me the assumption of Dalton's atomic theory. NOTE- everyone will give answer according to the question except a girl whose name is started from Buv... otherwise i will report ur answer.​

Answer»

Assumptions of DALTON's ATOMIC THEORY:Every element is made up of extremely small PARTICLES called an atom. The atoms are indivisible and they can neither be created nor be DESTROYED. Atoms of the same element resemble each other in all respects but differ from the atoms of other elements.Explanation:Buvi is my friend on brainly

48817.

Calculate the molarity of Na2CO3 solution prepared by dissolving 5.2 g in enough water tomake 500 ml solution. (Molar mass of Na2CO3 = 106 g mol-1)

Answer»

0.1 mol/litresExplanation:Molarity=(no. of MOLES)/total volume of the SOLUTION(LITRES)

48818.

Which element have greater value of screening effect

Answer»

The magnitude of screening EFFECT DEPENDS upon the number of INNER electrons. i.e HIGHER the number of inner electrons, greater SHALL be the value of screening effect.

48819.

Importance of functional group

Answer»

Here is the solutionExplanation:Functional groups are IMPORTANT in chemistry because they are the PORTION of a molecule that is capable of characteristic REACTIONS. They, therefore, determine the properties and chemistry of many organic compounds. An organic compound is any compound that CONTAINS carbon and another ELEMENT.

48820.

The rate of a certain hypothetical reaction A + B + C → products is given by r = −d[A]/dt=K[A]1/2[B]1/3[C]1/4. The order of the reaction is (a) 13/11 (b) 13/14 (c) 12/13 (d) 13/12

Answer» HI good NIGHT have a NICE day BYE
48821.

8274735746733twcrg373737is Vs and 3ye3yr63y6ey364y6r 6463636363636366663637

Answer»

erfgtdhfExplanation:qwsedf

48822.

Potassium burns in absence of air. Give reason.

Answer»

Potassium nitrate REACTS with charcoal and sulphur to PRODUCE potassium sulphide, CO2 gas and N2 gas along with HEAT. Potassium nitrate contains PLENTY of oxygen to ensure good combustion.

48823.

Describe the functional group of oxygen

Answer»

hii MATE how are you? here is your ans. Explanation:Aldehydes, ketones, carboxylic acids, esters, and ETHERS have oxygen-containing functional GROUPS. IUPAC naming can be used for ALDEHYDE, ketone, carboxylic acid, and ester- and ether-containing molecules

48824.

4. பேச்சுமொழியின் அழகியலையும் பண்பாட்டுக் கூறுகளையும் கொண்டிருப்பவை please answer

Answer» SORRY I didn't UNDERSTAND
48825.

Nimn ke rasayanik sutra AVN naam likhiye sirka glucose polythene jahrili sharab chloroform insaf ki

Answer»

tion:Nimn ke rasayanik sutra AVN NAAM LIKHIYE sirka glucose polythene jahrili sharab chloroform insaf KI

48826.

a mixture of CS2 and H2S when oxidized earrings a mixture of Co2 and SO2 and H2O which exerts a pressure of 740 8.8 mm of HG when connected in 60 litres vessel at 3 27 degree Celsius to oxidized Asher 2 and the mixture 700 ml of 2 and iodide where required what was the mole fraction of CS in the mixture​

Answer»

hii mate here is your answer Explanation:According to question ,CS 2 +3O 2 →CO 2 +2SO 2 __________(1)2H 2 S+3O 2 →2H 2 O+2SO 2 ____________(2)Total moles of gases SO 2 ,CO 2 and H 2 O exerted.pressure,n= RTPV = 0.0821×6007.2×82.1 n= 49.26591.12 = 12 moles.when I 2 react with SO 2 I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4 moles of I 2 REQ. = 5×2 = 10It means only 10 mole SO 2 releasedand 12-10=2 moles other gases (CO 2 ,H 2 O)According to eq (1) and (2).2 mole SO 2 = 1 mole CS 2 10 mole SO 2 = 210 = 5 mole CS 2 Rest 2 mole gas also given by 2 mole CS 2 So,Total moles of CS 2 in mixture = 5 + 2 = 7Answer = 7

48827.

Draw a cycle figure to show interconvension of state and explain fusion vaporisation condensation, solidification,and sublimation

Answer»

tion:This is a WELL EXPLAINED diagrammatic representation of interconversion of SOLID to LIQUID ETC.

48828.

A mixture of benzene and acetone is used for

Answer» NAIL POLISHES AND SANITIZWES USUALLY EXPLANATION:DURING CORONA ALSO,,
48829.

Write IUPAC name of the following.CH 3​ CH=CHCH 2​ OH.

Answer» TION: but -2-enol this is the ANSWER
48830.

How much amount of water can be decomposed through electrolysis by passing 2F ccharge

Answer»

2.5mol amount of water can be DECOMPOSED through ELECTROLYSIS by PASSING 2F ccharge

48831.

If the uncertainty in velocity of electron is 0.06 m/s, what is the uncertainty in position of electron?

Answer» TION: ∆x • ∆p=H/4π∆x= h / 4π•∆p∆x = 6.6*10^-34/4*3.14*0.06∆x = 8.75*10^-34
48832.

How to make 10 nanomolar solution from 1 molar solution?

Answer»

To make a 1 M solution, slowly ADD 26.403 mL of your stock solution to 250 mL deionized WATER. ADJUST the FINAL volume of solution to 1000 mL with deionized water.Explanation:

48833.

Give 5 name of acids nd 5 base nd give Metal nd non metal in this

Answer»

Here is the solutionExplanation:EXAMPLES of AcidsHydrochloric acid (HCl) in GASTRIC juice.Sulphuric acid (H2SO4)Nitric acid (HNO3)Carbonic acid in soft drink (H2CO3)Uric acid in urine.Ascorbic acid (Vitamin C) in fruit.Citric acid in oranges and lemons.Acetic acid in vinegar.Some common STRONG Arrhenius bases include:Potassium hydroxide (KOH)Sodium hydroxide (NaOH)Barium hydroxide (Ba(OH)2)Caesium hydroxide (CsOH)Strontium hydroxide (Sr(OH)2)CALCIUM hydroxide (Ca(OH)2)Lithium hydroxide (LiOH)Rubidium hydroxide (RbOH)

48834.

Is 2 methyl propanol chiral compound ????please answer genuinely!!​

Answer» TION:
48835.

Calculate wavelength of radiation emitted when electron de exists from n=2 to n=1 hydrogen atom.​

Answer»

The observed hydrogen-spectrum wavelengths can be calculated using the following formula: 1λ=R(1n2f−1n2i) 1 λ = R ( 1 n F 2 − 1 n i 2 ) , where λ is the wavelength of the emitted EM radiation and R is the RYDBERG constant, determined by the EXPERIMENT to be R = 1.097 × 107 / m (or m−1).

48836.

Sulphur dixoide is pollutant

Answer» LIKE nitrogen dioxide, SULFUR dioxide can CREATE secondary POLLUTANTS once released into the AIR. Secondary pollutants formed with sulfur dioxide include sulfate aerosols, particulate matter, and acid rain.
48837.

The number of electrons that have total charge of 965 coulomb is a. 6.022 x 1023 b) 6.022 x 1022 c. 6.022 x 1021 d. 3.011 x 1023

Answer» TION:⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
48838.

Which of the following has least electron gain enthalpy? A) sulpur B) chlorine C) Flourine D) oxygen

Answer»

A) EXPLANATION:SulphurI THINK so but not too SURE

48839.

Q If 204 g of sugar dissolves in 100 g of water at 20° C ●How much more sugar can be dissolved if the 250 g of water is at 80° C?​

Answer»

100 g of water dissolves 204 g of SUGAR. Therefore, 25 g of water WOULD dissolve 204×25÷100 =51G of sugar at 20°C.Explanation:100 g of water dissolves 204 g of sugar. Therefore, 25 g of water would dissolve 204×25÷100 =51g of sugar at 20°C.

48840.

Calculate wavelength of radiation emitted when electron de exists from n=2 to n=1 hydrogen atom​

Answer»

The observed hydrogen-spectrum WAVELENGTHS can be calculated USING the following formula: 1λ=R(1n2f−1n2i) 1 λ = R ( 1 N f 2 − 1 n i 2 ) , where λ is the wavelength of the emitted EM radiation and R is the Rydberg constant, DETERMINED by the experiment to be R = 1.097 × 107 / m (or m−1).

48841.

Calculate wavelength of radiation emitted when electron de exists from n=2 to n=1 hydrogen atom jisko acha sa ata ha wo hi karna kuki ha board ka ha islaya​

Answer»

The observed hydrogen-spectrum wavelengths can be CALCULATED using the following formula: 1λ=R(1n2f−1n2i) 1 λ = R ( 1 n f 2 − 1 n i 2 ) , where λ is the wavelength of the EMITTED EM radiation and R is the Rydberg constant, determined by the EXPERIMENT to be R = 1.097 × 107 / m (or m−1).

48842.

What is filtration? how is it useful at home?​

Answer»

, ventilation and air conditioning (HVAC) SYSTEMS at HOME, work and stores use air filter to remove particles and sometimes odors/CHEMICALS. The water you drink is almost certainly filtered to remove particles, chemicals, heavy metals and more. In your body, the kidneys, LIVER and lungs are the most obvious.hope it was helpful to youmark me brainlist please

48843.

Why tri amine is less basic than dimethyl amine

Answer»

However, TRIMETHYLAMINE despite the presence of three -CH3 groups is a WEAKER base COMPARED to it. This is DUE to steric CROWDING which makes the approach and bonding by a proton more difficult i.e. the path is blocked due to the presence of three methyl groups. This decreases its basicity

48844.

calculate the partition coefficient for the analyte when an unretained solute passes through a chromatography column in 3.7min and analyt requires 8.4min .assume the volume of mobile phase is 1.4 times than the volume of stationary phase

Answer»

hi good NIGHT have a NICE DAY bye

48845.

Give some example of functional group containing oxygen

Answer»

Aldehydes, ketones, CARBOXYLIC acids, esters, and ethers have oxygen-containing functional groups. IUPAC NAMING can be USED for aldehyde, ketone, carboxylic acid, and ESTER- and ether-containing molecules.

48846.

two moles of oxygen contain in vessel A and two moles of hydrogen contaain in a vessel B .Both vessels have equal volume and they are at a same temperture.pressure in which vessel is highest

Answer» OPTION A EXPLANATION:HYDROGEN has very LESS DENSITY
48847.

Calculate mass of sugar and water required to make 150 gram of 20% was solution

Answer» TION:Mass percentage of cane SUGAR = 25We know that,Masspercentage= MassofsolutionMassofsolute ×100So, 25= 250Massofcanesugar ×100orMassofcanesugar= 10025×250 =62.5gMass of water = (250-62.5)=187.5 G
48848.

(c) इलेक्ट्रानिक स्पेक्ट्रम को स्थितिज ऊर्जा वक्र की सहायता से समझाइए। इस वक्रों की सहायता से अणुओं की विजोजन ऊर्जा की गणना कैसे करेंगे? ​

Answer»

photosynthesis the PROCESS by which GREEN PLANTS turn CARBON dioxide and water into food energy from sunlight is CALLED photosynthesis

48849.

State law of Octaves​

Answer»

Law of octaves, in chemistry, the generalization made by the ENGLISH CHEMIST J.A.R. Newlands in 1865 that, if the chemical elements are arranged ACCORDING to increasing atomic weight, those with SIMILAR physical and chemical properties occur after each interval of SEVEN elements.Explanation:hope you have beenunderstoodmark me as well brainlistany doubt? ask me every thing

48850.

How to qualify gpat easily

Answer»

have a concelling SESSION.