chemistry! URGENT

60,487 results, page 100

Chemistry

what mass of NaCl do you need to make a 500mL of a 0.10M solution?

Chemistry

C + HNO3 = CO2 + NO2 + H2O oxidation, reduction and balancing

chemistry

calculate the solubility of PbI2 in 0.0123M CaI2. Ksp=6.81x10^-9

Chemistry

Determine the specific mass of fluorine (F2) in g/cm³ in 20°C and 188 torr

Chemistry

How do I make a 500ml amount of a 0.3% aqueous solution of chlorine dioxide

chemistry

What is the oxidation number of chlorine in Al(ClO4)3? I don't understand this question, can someone help? Thank you!

chemistry

Net Ionic Reaction and molecular Equations of Ca3(PO4)2

chemistry

How many grams of NaC2H3O2 are needed to prepare 350. mL of a 2.75 M solution? i got 79.0 ??

Chemistry-Dr.Bob222

Determine [OH-] of a solution that is 0.135 M in CO3^2-. I got 0.00532.

chemistry

Why is it important to use the same pipet through out the experiment?

chemistry

Highlights the basic points in lewis and langmuir theory of electrovalency.

chemistry

what is the molarity of the solution comtaining 2.5g of acetic acid in 75g of benzene

chemistry

A nickel is about 2 millimeter thick or 2/1000 of a meter. How many nanometers is this?

Chemistry

What is the yield of the synthesis of ammonia to 400° C and 500 atm of pressure?

Chemistry

how would you prepare pure dry crystals of potassium trioxonitrate?

chemistry

0.717g of potassium dihydrogen phosphate in 500ml concentration in ppm

Chemistry

Calculate the boiling temperature of a 0.50 M solution of sucrose. Assume that the concentration is 0.50 m.

Chemistry

What mass of sodium phosphate is needed to produce 75.00 g of solid product?

Chemistry

Will 1 L of 1 M NaCl contain more chloride ions than .5L of 1M MgCl2? Explain.

chemistry

What is the main factor driving the difference in the spontaneity of the three reactions Cl^2,Br^2, and l^2?

Chemistry

A type of heat that involves no contact at all would be ?? Radiation

chemistry

Calculate the de Broglie wavelength (in pm) of a hydrogen atom traveling 450 m/s .

Chemistry

Zn (0.85M) + Cu (1.10M) in an electrochemical cell. what is the conc of the zinc ion?

Chemistry

Balanced chemical equation for H2O + SO2 --> O3 + H2S + SO3?

Chemistry

How many grams of MgCl2 would be required to make 440 g of magnesium ?

chemistry

what about a mixture whose specific rotation was found to be -9.2 degree?

Chemistry

What is mass in grams of a pure iron cube that has a volume of 4.10 cm3

chemistry

How many grams of cuso4.5h2o are require to prepare 100ml of 500ppm cu

chemistry

calculate the poh of 1 dm^3 of naoh solution containing 4 g of sodium hydroxide

chemistry

The measured density oe He at NTP is 0.1784g/l.what is the weight of one mole?

Chemistry

would someone be willing to help me fill out my study guide

Chemistry

When chromium has 26 electrons, how many neutrons and protons does it have and what is it's standard notation

Chemistry

How many grams of perchloric acid are dissolved into 3.86 L of water, if the pH of the solution is 4.03.

chemistry

2NO + O2 = 2NO2 How many grams of NO2 will be produced when 5.00 moles of NO react?

Chemistry

What is the gram solubility of Mg(OH)2 in a 0.55mol/L solution of KOH if the Ksp of Mg(OH)2 is 9.0x10^-12?

Chemistry

Complete the following equations: A) methyl butanone + oxygen ---> B) a pentagon + F2 ----->

Chemistry

How many moles of a gas are present in 2.0L cylinder at 1.50 atmospheres and 17 degree's celcius?

Chemistry

Find the concentrations of all species in a 0.10mol/l solution of NaOH

chemistry

What quantity of CaCO3 (limestone) on heating will give 112g of CaO?

chemistry

what are the products of a concentrated hydrochloric acid if inert electrodes are used

Chemistry

Calculate the pH of a mixture of 20.0 mL of 0.150 M HCl and 10.0 mL of 0.300 M NaOH.​[7.00]

chemistry

Calculate the loss in mass if 20.2g of KNO3 crystals was completely decomposed(K=39,N=14,O=16

Chemistry

How would you prepare pure dry crystals of potassium trioxocarbonate (v)

Organic chemistry

What are the examples of compounds extracted by solvent diethyl ether?

Chemistry

How many liters of 0.85 M HCl solution would react completely with 3.5 moles Ca(OH)2?

chemistry

Calculate the pH of a solution obtained by mixing 50 mL of NH3 0.1 M (Kb = 1.8•10–5 mol/L) and 25 mL of HCl 0.2 M.

chemistry

Write the balanced chemical equation for the dissolution of magnesium sulphate

Chemistry

What is the oxidized substance in the following reaction? Fe + 2HCl → FeCl2 + H2

chemistry

Dissolve 50g of sodium hydroxide in 1 litres and determine the normality

Chemistry 12th

How can you prepared to benzo phenol from phenyl magnetium bromide

Chemistry

What are 2 allotropes of carbon? Could you please compare the physical and chemical properties....

chemistry

how many numbers of oxygen molecules are present in 3 litres of CO2 at STP?

chemistry

P4 + HNO3 = H3PO4 + NO2 + H20 by partial method balancing

chemistry

How many grams of nacl are required to completely neutralize 100 ml of 1M h2so4?

Chemistry

Write the Kc expression for the following reaction: Fe3+ + SCN- = FeSCN2+

chemistry

Arrange given metal in decreasing order of electrical conductivity ( Al ,Ag ,Hg ,K,Ca

Chemistry

KMnO4 + H2SO4 + H2S will give K2SO4 + MnSo4 + H20 + S

science chemistry

balance Redox :- CuS + SO4²- = CuO+SO2

science chemistry

balance Redox :- CuS + SO4²- = CuO+SO2

Chemistry

What volume of ammonia gas at s.t.p is required to neutralise 40 cm of 2 M sulpheric acid?

chemistry

what is the pH of a solution prepared by adding 0.65mol of LiOH(aq) to 1.0L of 0.30mol/L HNO3(aq)>

Chemistry

What effect does the presence of an impurity have on the freezing point of a liquid?

chemistry

Write the balanced chemical equation for the oxidation of catechol to quinone.

chemistry

WHAT does it mean for a phase of matter to have a definite shape and volume

Organic Chemistry

How many constitutional isomers have the molecular formula C3H6S ?

Chemistry

What is the Net Ionic Equation for Nitric Acid and Potassium Carbonate?

Chemistry

What is the advantages and disadvantages of using sodium carbonate to soften water?

Chemistry

What volume of 17 M sulfuric acid must be used to prepare 0.15 L of 1.78 M H2SO4?

Chemistry

i need help making an acrostic poem using the word nonmetal

CHEMISTRY

write the orbital notation for the following set of quantum numbers n=1, l=0, m=0

Chemistry

What pressur would the propane gas sample have at 75Ml

Chemistry

How many moles of nitric oxide are formed from 0.60 mole of nitrogen dioxide

Chemistry

Na2CO3(aq)+ 2HNO3(aq)--> 2NaNO3+H2O(l)+CO2(g) how do I get net ionic?

Chemistry

why are most elements on the periodic table found as compound in nature?

chemistry

Calculate the number of moles of O2 that can be produced by the decomposition reaction of water

chemistry

equilibrium is reached when red hot iron reacts with steam.why?

chemistry

Calculate the Debroglie wavelength of a mass 1.0g traveling at 1.0cm/sec

Chemistry

What diff will appear in the mass no.if the no. of neutron is halved no. of electron is doubled in 8 O 16

Chemistry

What mass of water is needed to completely react a 8.1 g packet of magnesium

Chemistry

What is the solute-solvent interaction between silver nitrate in water?

Chemistry

Determine the mass of iron in the following solution. 325mL of FeSO4.

chemistry

Identify the element that has a ground state electronic configuration of [Ar]4s23d104p 4

Chemistry

What are some classes of organic compounds that have unpleasant odors?

chemistry

What volume of alcohol would you use if you needed 25.0 g? Density is 0.7855 g/ml at 20°C

Chemistry

How would I make a 93.1% w/w solution from 96% sulfuric acid using volume

chemistry

why half cell reactions are given in reduction reations by IUPAC?

chemistry

What is the seperation energy ineV for Be3+ in the first excited state in eV?

Chemistry

The mass of silver produced by thermal decomposition of 5.52g Ag2CO3

Chemistry

The concentration of hydrogen ion in a sample of soft drink is 3.8×10^-3M. Calculate it's pH.

chemistry

Explain how sodium carbonate can be used to soften hard water

Chemistry

Calculate the work done when 36.0 g of tin dissolves in excess acid at 1.00 atm and 30.1 C.

Chemistry

Using equation only. Show how tetraoxosulphate(IV) can be prepared industrially

chemistry

Calculate the maximum number of unpaired electrons that can be placed in a 6d subshell

chemistry (ap)

What will be the reaction rate (formation of C) when the concentrations of A & B are 0.150 M and 0.250 M respectively?

General chemistry

Calculate the molarity of 500.0 ml solution containing 26.5g Na2CO3

chemistry

4.8g of Mg were burn in 3.2g of oxygen. The MgO produced at a mass of 8g what is the equation of the reaction

chemistry

If air contains 78yby volume.is solubility of nitrogen in liquid

Chemistry pls help DR.BOB

What intermolecular forces are responsible for neoprene's stretchiness?

CHEMISTRY

What will be the reaction rate (formation of C) when the concentrations of A & B are 0.150 M and 0.250 M respectively?

chemistry

What is the half-life of an isotope that decays to 50% of its original activity in 55.6 hours?

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