chemistry! URGENT

60,186 results, page 100

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 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?

Chemistry

How many liters would 1.000g of helium gas occupy at STP?

chemistry

Explain the first ionization energy of lithium is greater than that of sodium

Chemistry

What type of solid is Ne? Metallic? Molecular? Ionic? or Covalent Network?

chemistry

Word equation of dissolving zinc in dilute susurphuric acid

chemistry

determine the mass of carbon4oxide produced from burning 104g of ethyne

chemistry

calculate the number of molecules in 6.4g of so2. (b) 1.5 moles of hydrogen chloride

chemistry

What is the molality of a solution containing 11.1 g Na2SO4 dissolved in 2269.2 g of water?

Chemistry

Calculate the wavelength of nitrogen molecule travelling with a speed of 500 m/s

Chemistry

Calculate the number of moles of ZnCl, in 100mL of 3.00M solution.

Chemistry

Which pair of reactants will not react? Au(s) with Hg^2+ (aq) Pt^2+ (aq) with Au(s) Ag(s) with Cu(s) Au(s) -> Au^3+(aq) + 3e- Hg(s) -> Hg^2+(aq) + e- Pt(s) -> Pt^2+(aq) + 2e- Cu(s) -> Cu^2+(aq) + 2e- My guess is all of them, but I am not entirely sure.

Science: Chemistry

What is the mass percent of oxygen in sodium bicarbonate(NaHCO3)?

chemistry

What is the balanced equation for reaction between hydrochloric acid and water?

chemistry

What os the balanced equation for the reaction between ethanoic acid and water?

chemistry

Calculate how many cm3 of 1M HCl is necessary to dissolve 1g of magnesium ribbon

Chemistry

How many grams of lithium are required to completely react with 61.9 mL of N2 gas at STP

Chemistry

How do you prepare 17.2cm³ of 36% conc HCL per dm³ of solution?

Chemistry

calculate the volume occupied by 7g of N2 gas at 27 degree c and 750mm Hg pressure

Chemistry

What is the subshell designation for an electron with the following set quantum numbers? 1) n = 1; l = 0 2) n = 3; l = 2; mi = -1 3) n = 4; l = 3 3) n = 2; l = 0; mi = 0

chemistry

2KCLO3+heat makes 2KCL+3O2 is it endothermic or exothermic

chemistry

calculate the weight of nacl present in 250 g of 0.01m solution

chemistry

ethyacetoacetate gives positive test with sodium bisulphate. explain

Chemistry

Choose the most polar bond from the options given below. a) B-O b) B-S c) C-N d) C-O

Chemistry

Calculate the solubility of ZnCO3 in a buffer solution with a pH of 9.83 and Ksp of 1.2x10^-10

Chemistry

is H2CO3+2LiOH=Li2CO3+2H2O a oxidation reduction reaction??

CHEMISTRY.

Calculate the ph of a solution containing 0.15M HF (ka= 7.1x10^-4) and 0.26M NaF.

chemistry

a 215 ml sample of ocean water contains 7.1g. what is the molarity of nacl

Chemistry

The nitrogen-containing bases in RNA have the abbreviations ____________________. A) A, G, C, U*** B) A, G, T C) A, G, U D) A, G, C, T E) A, G, T, U F) A, G, U, T

chemistry

showing your work convert R=0.08206 atm dm^3 mol^-1 k^-1 to jmol^-1 k^-1

chemistry(a mystery)

Which one is more reactive between chlorine and nitrogen and why?

Chemistry

Which of the following is a molecular compound? H2S, MgBr2, Fe2O3, none of these

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