Chemistry category

Chemistry category

Chemical elements

Atomic and molecular chemistry

Chemical composition

Household chemistry

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Chemistry jargon

Water chemistry

Posted by Alfred Provido some time ago

A 4.0520g sample of hydrochloric acid, sp. Gr. 1.18, required 44.15ml of 0.9035N sodium hydroxide in a titration. Calculate (a.) %w/w HCl (b.) HCl content (c.) normality, (d.) Na2CO3 titer of the sample MW = 106

Posted by AskingForaFriend some time ago

Is it safe to drink the tap water where you live?

Posted by Anandaraj some time ago

Who is the principal of gems e

Posted by vincentyyl some time ago

Is there a way to download Spotify songs?

Posted by bostjan64 some time ago

At what temperature do ideas boil?

Posted by bostjan64 some time ago

Is anything made of tin anymore?

Posted by Gabriela4678 some time ago

Two samples of cooper(II) sulfate solution with concentrations of 0.080M and 0.30M were analysed using a spectrophotometer. Which sample would show the strongest absorption of light? PLS HELP ME. Im dumb in Chem :)

Posted by bostjan64 some time ago

What is your favourite heavy metal?

Posted by Lauren674 some time ago

Calculating concentration of fluoride in a homemade mouthwash.

Posted by Nicole Osborne some time ago

a) If 14.6 mL of HNO3 reacts with 25.0 mL of 0.750 M Ca(OH)2, what is the molarity of the HNO3 solution? b) What volume of 0.300 M Ca(OH)2 is required to react with 250.0 mL of 0.500 M HNO3?

Posted by Nicole Osborne some time ago

What volume (in L) of hydrogen at STP is produced as sulfuric acid (H2SO4) acts on 102 g of metallic calcium (Ca).

Posted by Nicole Osborne some time ago

A) Starting with 600.0g of glucose, what is the theoretical yield of ethyl alcohol? B) If 76.9g of C2H5OH was obtained, what was the percentage yield?

Posted by Nicole Osborne some time ago

For the reaction: 2Fe + 3CuCl2 = 2FeCl3 + 3Cu. 10g of Fe and 18.0g of CuCl2 are mixed together and a reaction occurs.

Posted by Nicole Osborne some time ago

What is the maximum weight of SO3 that could be made from 10.0 g of SO2 and 5.00 g of O2 by the following reaction?

Posted by Nicole Osborne some time ago

How many grams of iron (III) oxide would ideally be formed by the reaction of 55.0 g Fe with excess oxygen gas? If the actual reaction involving this same 55.0 g Fe produced only 26.9 g of iron (III) oxide, what would be the percent yield?

Posted by Nicole Osborne some time ago

Determine the mass of CO2 and H2O produced on combusting 140 g of C2H2 in the presence of excess O2.

Posted by Nicole Osborne some time ago

How many grams of Al2O3 can be formed when a mixture of 6.9 g of aluminum and 12.8 g of oxygen is ignited? Which substance is in excess and how many grams is in excess?

Posted by Nicole Osborne some time ago

The heating of NaNO3 decomposed it to NaNO2 and O2. How many grams of NaNO3 would you have to decompose to produce 2.63 g of O2?

Posted by Nicole Osborne some time ago

Upon the addition of heat to an unknown amount of KClO3, 0.48 g of oxygen was produced. How many grams of KClO3 reacted?

Posted by Nicole Osborne some time ago

225 g of calcium carbonate is decomposed to yield calcium oxide and carbon dioxide, according to the equation: CaCO3(s) → CaO(g) + CO2(g) Only 28.2 L of carbon dioxide is recovered at STP. a) Calculate the theoretical yield of CO2 (as a volume of gas at STP). b) Determine the percent yield of the reaction.

Posted by bostjan64 some time ago

If you burn bleach, does it make the fire whiter or does it make the bleach darker?

Posted by bostjan64 some time ago

Are you willing to drink hydrogen hydroxide?

Posted by bostjan64 some time ago

Where can I get metal test coupons?

Posted by Mikayla N Kriechbaum some time ago

345 kJ of heat energy is released when a sample of liquid water is frozen to solid ice. How many grams of water were frozen? heat of fusion of water = 334 J/g

Posted by bostjan64 some time ago

What chemical change causes oil-based substances to yellow as they age?

Posted by Imogen58princess some time ago

How to convert -log mol/kg to mg/kg?

Posted by Perkulator some time ago

KHP titration help

Posted by Perkulator some time ago

titration help please

Posted by Perkulator some time ago

write the condensed, complete, and net ionic equations for any reaction that occurs between K2CrO4(aq) and Fe(NO3)3(aq).

Posted by bostjan64 some time ago

What is the freezing point (or gel point) of Gasoline?

Posted by Linda Joy some time ago

If the Silver Surfer and Iron Man team up, would they be alloys?

Posted by GDCZ2019 some time ago

Does the automation coating line operator need professional knowledge？

Posted by GDCZ2019 some time ago

What is organic coating?

Posted by Briana Turner some time ago

What Happens to the Atoms of Soda as it Freezes?

Posted by fishboy some time ago

Can some one tell me the ph and water hardness of tap water?

Posted by Crish Nagarkar some time ago

which solids crystallises as fcc

Posted by Sam Khan some time ago

Name two metals which are added to iron and carbon no make stainless steel

Posted by Sulaiman Inayat some time ago

Amongst the following which one has weakest London dispersion forces present, NH3, C2H5OH and H2SO4? Please explain it.

Posted by Asui Naro some time ago

Why can hydrogen be used as a fuel

Posted by Bibaran Gautam some time ago

Photochemical reaction mechanism

Posted by Goldy Virk some time ago

When i wear a silver necklace of my father it got black but in my fathers case it not get black for about till 3 years but i wear it for 3 days whithin it got black

Posted by Goldy Virk some time ago

What happen if we place oxyheamoglobin blood in the front of UV Rays

Posted by Saravana Sp Saravanaa some time ago

Electron gain enthalpyof Na+?

Posted by Jignasha Patel some time ago

Matter can be made up of one kind of particles is said to be _______?

Posted by Diwakar Methil some time ago

When the light from a torch is turned on towards a copper plate the bulb was fused in a short time. What chemical caused the bulb to fuse?

Posted by Rohan Soni some time ago

The freezing point of depression of 0.1 molar solution of Acetic acid in Benzene is 0.25k KF for benzene is 5.1 to kelvin kg per mole what is concerned can you come about motivation state of Acetic acid in Benzene

Posted by Truthlove007 some time ago

Where can find deoamer for print?

Posted by swapnilsharmale some time ago

Why Content is important for SEO ?

Posted by Jackable T some time ago

If your sample is 0.7 M acetic acid solution, for a 25.00 mL aliquot, (-----------mL) of NaOH would be needed to reach the end point. what number gors to blank? 1)175 2)70 3)25

Posted by Anonymous some time ago

Side effects of phenylketonurics or phenylalanine

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