chemistry! URGENT

59,905 results, page 65

chemistry

How can Coulomb's law explain the distribution of electrons.

Chemistry

Why does the carotene elute from the column before the chlorophylls?

Chemistry

Why does the carotene elute from the column before the chlorophylls?

Chemistry

Why does the carotene elute from the column before the chlorophylls?

Chemistry

Why does the carotene elute from the column before the chlorophylls?

Chemistry

What is the percent by mass of NaHCO3 and KCl in the mixture.

chemistry

Calculate the pH of a saturated solution of Sr(OH)2. The Ksp for Sr(OH)2 is 3.2x10^-4.

Chemistry

What is the name of the substance with formula Cu(H2O)6SO4?

Chemistry

How do I get the answer to ?mass, 200 cm3volume, 6.843 g/ml=

Quick chemistry help

What is the precipitate color for Na3PO4+CaCl2?

chemistry

chemical formulae for naphthalene and benzoic acid

chemistry

why does HF have a boiling point of 19°c and H2O 100°c

Chemistry

calculate the density of 50.0 g of gold that occupies a volume of 2.59 mL.

Chemistry

what is the PH of a solution of .1 M NAN3 that disassociates into HN3

chemistry

How many kilocalories are required to produce 1.83mol of aluminum?

chemistry 30

Calculate the enthalpy of reaction for the combustion of ethene.

Chemistry

how to prepare 100.0 ml of 0.2 M solution of sodium hydroxide

Chemistry

Are acids or bases suppose to react with carbonates?

chemistry

Calculate the hydroxide ion concentration of a solution with pH = 8.25.

Chemistry

What is the empirical formula for a compound that is 1.67g Ce and 4.54g I?

chemistry

is acid rain homogeneous or heterogeneous mixture?

chemistry

I would love help on trying to start this problem?

biology/ chemistry

how do electrolytes affect the formation of micelles?

chemistry

what is the strongest intermolecular force in nitrogen trifluoride

Chemistry

How many grams of CO(g) are there in 67.0mL of the gas at 0.826atm and 30 ∘C?

chemistry

Calculate the volume occupied by 3moles of a gas at r.t.p

Chemistry

What intermolecular forces are responsible for neoprene's stretchiness?

chemistry

the complete electrolysis of 90 grams of water will yield

chemistry

What is the heat involved when 3.00 g of aluminum oxide is formed?

chemistry

Why do you add Sodium hydroxidein your reduction procedure

Chemistry

What is a balanced equation for a Base-Acid Titration?

chemistry

How many grams of H2 are needed to produce 12.22g of NH3?

chemistry

How many molecules (not moles) of NH3 are produced from 3.55×10−4g of H2?

Chemistry

C18H32O2 + 2H2 - C18H3602; oxidized or reduced?

chemistry

what is ion pair formation in regards to extractions

Chemistry

What is the energy and frequency of a photon with a wavelength of 2.57 ×102 m?

chemistry

How to calculate the concetration on a Beer's law plot?

chemistry

q4 What element has the greatest first ionization energy? Li Na K Rb Cs

chemistry

What is the approximate effective nuclear charge for arsenic ?

Chemistry

In which condition(s) can I get this reaction: Fe + H2SO4 = Fe2(SO4)3 + H2

chemistry

how many ml of nitric acid will neutrilize 20 ml of KOH at .5 moles

chemistry

why does the neutrality in the blood depends on the concentrations of [H+] and [OH-] rather than pH.

Chemistry

How much heat is absorbed when 60.0h of ammonia is vaporized ?

chemistry

How many equivalents of an acid or base are in the following? 0.43mol Mg(OH)2 and 2.8g Mg(OH)2?

chemistry

find the numbers of elerctorins in 18ml water

Chemistry

Explain why a catalyst speeds up a chemical reaction.

Chemistry

Why may the absorbance of a filtrate be higher than it's theoretical concentration?

CHEMISTRY

ARRANGE THE FOLLOWING 0.1 M SOLUTIONS IN ORDER OF INCREASING PH

chemistry

What is the mass of 225ml of a liquid that has a density of 0.880g/ml

Chemistry

Calculate the frequency of an electron traveling at 1.85X10^7 m/s.

chemistry

What is the dominant intermolecular force for propionic acid?

Chemistry

Does aluminum dissolve in acidic and basic solutions?

chemistry

how is silver separated from its soluble salt solution?

Chemistry

How many grams of rust are produced from the oxidation of 10.0 lb of iron?

Chemistry

Round to the correct number of significant figures. 1) 6.02/2.23 2.70 2) 18.42/2.34 7.87 3) 35.15/3.10 11.3

Chemistry

How would you know if AgNO3 + Al(NO3)2 forms a precipitate?

chemistry

What is the molecular weight and formula for petroleum ether?

organic chemistry

how many atoms are there in 42.2g of sulfur divided by 1.0x10 to 23

Chemistry

How many hydrogen atoms are in a 15.00 mg sample of glucose? (C6H1206)

chemistry

Write the differences between atom and molecules?

chemistry

Which ions are formed during electrolysis of water?

Chemistry

A solution of NH3 in water has a pH of 11.17. Calculate it's molarity

Chemistry

Explain the role of CH3CO2Na n the preparation of Fe(C5H7O2)3)3

Chemistry

Explain the role ch3co2na in the preparation of fe(c5h7o2)3

chemistry

What mass of water can be heated from 45C to 88C with 28 kj?

Chemistry

How do I find the number of grams of .25 moles of neon?

analytical chemistry

At what ph will Al(OH)3 begin to preciptate from a .10 M solution of AlCl3?

Chemistry

How much heat (in kilojoules) is released on reaction of 5.30 g of Al?

chemistry

How many oxygen atoms are present in 2.00 millimoles of H2SO4?

chemistry

what can be separated into atoms with a chemical reaction.

Chemistry

Calculate the number of ion 16g H2CO3

chemistry or physics

What is the speed of light in scientific notation?

chemistry

Determine the pH of a 1 M aniline solution (Kb = 4.2 10-10). I am unsure how to start, any help?

CHEMISTRY

2BrF3(g)Br2(g) + 3F2(g) STANDARD ENTHALPY?

Chemistry

Which of the following is a monatomic cation? Br NH4+ SO42– Fr+

chemistry

how many oxygen atoms are in 10 formula of Al2(SO4)3

chemistry

the number of moles in 12.04x10^23 molecules of Oxygen

Chemistry

How do shape and symmetry influence the polarity of a molecule?

Chemistry

What is the chemical formula and name when the following are added: 1. Na+1 Na-3 2. Na+1 Br-1 3. Na+1 O-2

chemistry

Is bp of para and meta and ortho isomer are same

chemistry

How many molecules are in 24.0 g NO2? Answer in units of molec.

chemistry

Tell me plz how we can characterize the compound K3[Al(c2o4)3]?

Chemistry

If a solution has a large Kb value, will it have a high pH?

Chemistry

Which THE PH VALUE OF A solution 0,01 mol/l a monoacido that presents ka= 1×10-6

Chemistry

how many L of O2 are needed to react completely with 63.0 L of H2S and STP?

Chemistry

Name the element that has a density of 4.700 g/mL at STP

chemistry

How much energy is absorbed to change 7.25 g of ice at -3 C to 25.5C?

Chemistry

What is the pOH of a 0.2M buffer solution of NH 4 + 0.2M NH4NO3 at 25 ° C. PKP = 4.74

Chemistry

How does the molecular wight of the gas affect the k-value?

Chemistry

how do you make 400 ml pf 2 Osm solution of Mg CL2?

Chemistry

What are the correct IUPAC names for triisopropylmethane and 2,2-dimethylcyclopentane?

chemistry

Let I know the equation with symbol of 'iron2oxide from iron fillings'

chemistry

What are the correct IUPAC names for triisopropylmethane and 2,2-dimethylcyclopentane?

chemistry

what does the spectrum of hydrogen tell us about its electrons?

Chemistry

Why do warm temperatures speed up the fermentation of milk?

Chemistry

Why is methanol a good solvent to recrystallize biphenyl?

Chemistry

What will be the volume of ammonia formed from 2L of nitrogen and 2L of hydrogen

Chemistry

I need to write a hypothesis on limiting reactants.

Chemistry

how many atoms are there in 1.13 liters of hydrogen peroxide H2O2?

Chemistry

Calculate the weight % of HOAc in pure Vinegar?

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