chemistry! URGENT

59,905 results, page 60

chemistry

how can you tell if a reactant is being oxidized or reduced

chemistry

how can you tell if a reactant is being oxidized or reduced

Chemistry

Is this reaction exothermic or endothermic? Fe(NO3)3+ NaSCN

chemistry

liters in 2.39x10^23 molecules of nitrogen triiodide

chemistry

what is some background on the ideal gas constant R

chemistry

does caco3 can easily pick up moisture from the surroundings?

chemistry

find Equimolar ratio of HClO2 & NaOH

Chemistry

Why is bond energy defined only for gases?

chemistry

How do you calculate the mass, in amu of 2287 atoms of Li

Chemistry

Why does it take more energy to remove a electron from Al+ than from Al?

chemistry

What is the mass of 4.54 10-2 moles of zinc chloride (ZnCl2)?

Chemistry

Calculate the enthalpy change at 300kalven for the reaction?

chemistry

what is the procedure that is used to find actual yield?

Chemistry

What is the formula for Celsius and Kelvin scales for temperature?

chemistry

If 50.0 g of Ba(CN)2 reacts to produce 12.9 g of HCN, what is the percent yield?

chemistry

Calculate the number of moles in 35.7 grams of Na3PO3

Chemistry

How many moles of atoms are in one mole of AlPO4?

chemistry

how many significant figures does the sum of 8.520 the 2.7 contain?

chemistry

why are the atoms in metallic bonds positively charged?

Chemistry

What happens to the valence electrons in metallic bonds?

Chemistry

What is the energy of a mole of UV photons having a wavelength of 11 nm?

chemistry

In formula for where ferenheit and celsius converge (T = T x 9/5 +32); what is the logic that T x 9/5 = T + T = 4/5?

Chemistry

Benzene burns with intense smoky flame,this is b/c ?

Chemistry

How many grams of CO2 are formed when 32 g of O2 reacts with 23 g of C2H5OH?

Chemistry

which is more soluble in water: cyclohexane or glucose?

chemistry

Determine the boiling point of water at 698.5 mm Hg.

chemistry

what is the heaviest element with a single letter symbol?

Chemistry

What is the pH of a 0.01M solution of arginine that has a net charge of -.65?

chemistry

What would happen if O2 were added to N2(g) + O2(g) 2NO(g) at equilibrium?

Chemistry

1/2.165 = sqrt x/131.29. I am not sure how to solve for x.

Chemistry

Indicate which of the following quantum numbers are unacceptable: (a)(1,2,0,1/2) (b) (3,2,0,1/2) (c)(3,2,2,1) (d) (4,3,2,-1/2)

CHEMISTRY

What happens to the NH4+ and Cl] ions when they enter the water

chemistry

how many grams are contained in 500.g of a 25% solution of H2SO4?

chemistry

how many moles of oxygen are required for the combustion of 25.5 g of magnesium

chemistry

203.77miles/sec is converted to cm/nsec

chemistry

what did amedeo avogadro contribute to the atomic theory?

physics/chemistry

is conductivity a physical or chemical property

chemistry

At which temperature is NaCl more soluble in water, 0°C or 90°C? 0°C 90°C

Chemistry

A detergent solution has a pH of 11.63 at 25°C. What is the hydroxide-ion [OH-] concentration?

Chemistry

How do you draw a lewis dot structure of s3o

chemistry

what are three common ores from which copper can be extracted

chemistry

A Solute That Removes Hydrogen Ions from Solution

Chemistry

What compounds can be formed by the reaction of K2SO4 and BaCI2?

chemistry

calculate the pH of 20.00mL of 2.00 M HCl diluted to 0.500 L

chemistry

what isw the density of N2O,a gas at STP?

chemistry

How do you balance a chemical reaction word equation?!

chemistry

Which has the higher boiling point? (a) CH3CH2CH2CH2CH3 or (b) CH3CH2CH2CH2CH2CH2CH2CH3

chemistry

questions related to yield of chemical reaction.

Chemistry

Calculate the [H+], [OH ‾ ], and the pH of 0.16 M solutions of: hydroxylamine (HONH2, Kb = 1.1 10-8)

chemistry

how many moles of suctose are in 0.8L of a 2M solution? How many molecules of sucrose is this?

chemistry

What would happen if O2 were added to N2(g) + O2(g) 2NO(g) at equilibrium?

Chemistry

How many mL of 5.5 M KOH are needed to prepare 300 mL of 1.2 M NaOH?

Chemistry

Consider a solution containing 0.150 M Ba(OH)2. Calulate the pH.

chemistry

Mr=112.11 and 0.146mg/mL how do I change thiss to mmol/L

chemistry

please give me an example of a nanocomposite material

chemistry

The approximate pH of a 3.0 x 10-3 M solution of the strong acid H2SO4 is a) 3.5 b) 3.0 c) 2.5 d) 2.2 e) -3.0 how do you do this?

chemistry

The Ka for HOBr is 2.4 x 10-9. Thus, you can report the pKb for OBr– as a) 4.2 x 10-6 b) 9.62 c) 5.38 d) 8.62 e) 1.38 help!

Chemistry

Which one is the LR? Ag or S? 2Ag + S → Ag2S = 216 g Ag + 32 g S

chemistry

Write a balanced reaction for the formation of Fe2O3 (s)?????

chemistry

v=555mL at 1.00 atm. what is the volume at 689 torr?

Chemistry

So,my second method is correct isn't it? The answer is -78.4kJ?

Chemistry

How many mL of 3.0 M HCL are required to neutralize 250 mL of 2.0 M MgCL2 ?

Chemistry

Lewis Structure of Freon (CCI2F2)? And what is shape?

Chemistry

Empirical formula 12.67 aluminum, 19.73 nitrogen, 67.60 oxygen

chemistry

What is the volume at STP, in liters, occupied by 26.4 g of F2 gas?

chemistry

make 98.5 mL of 1.25 M barium nitrate from a 4.50 M solution. i do not know what to do with this information

Chemistry

How many moles of O are there in 32.4g N2O5, how many oxygen and nitrogen atoms are there in the 32.4g?

Chemistry

What is the pH of 1.0M Na2SO3 (aq)solution at 25C? a) 3.40 b) 6.03 c) 10.60 d) 7.96 e) 10.40 How can I get ph from only the Molarity?

chemistry

write the oxidation and reduction half reactions for mg+au^+---->mg^2^++au

Chemistry

How many moles of C2H2 are produced by 3.5 mol CaC2?

Chemistry

How can you determine which colorless liquid is less dense?

Chemistry

How many mL of .48 M NaOH are needed to react with 2.00 moles of H3PO4?

Chemistry

Attn: Dr. Bob Thank you so much for your help on this--greatly appreciated!

chemistry

Is calcium oxalate, CaC2O4, soluble in water?

chemistry

what is the density of carbon dioxide at 26.5 degrees C and 755 mm Hg?

Chemistry

Are the concentrations of CO, H2O, CO2 and H2 necessarily equal

chemistry

give at least 3 atoms with its isotopes and its application?

Chemistry

what are the rules used to determine the solubility of salt?

chemistry

What is the volume of 2.8 × 106 molecules He? Answer in units of L

chemistry

What is the density of propane (CH3CH2CH3) gas at 25°C and 65.0 cm Hg? (1atm=76 cm Hg)

chemistry

how to explain that HCL is a stronger acid than HOCL?

chemistry

If 2.3 mol of has a volume of 1.1 L at 289 K , what is the pressure in atm ?

chemistry

How many moles of ions are contained in 1.4 L of a 1.6 M solution of Mg(NO3)2?

Chemistry

If 84 g of CO2 were produced, how many grams of butanol were burned?

chemistry

How many moles of sodium are equal to 5.72 x 1025 atoms?

chemistry

What makes #Ag2S+2Al(s)=Al2S3+6Ag(s) ?

chemistry

2-octanol and 1-phenilethanol. which one more polarity?

Chemistry

Will 1-propanol and 1-butanol form an ideal solution?

Chemistry

0.200 moles of NaF are added to 1L 2.0 molar HF. What is the pH? a) 2.14 b) 6.70 c) 10.80 d) 3.00 e) 7.00

Chemistry

Complete each ionic equation Cu+2 + SO4-2 + 4H2O ---->

chemistry

which of the following is not a driving force for a chemical reaction?

chemistry

Calculate the pH of a 2.5x10-5 M lithium hydroxide solution.

Chemistry

What is the oxidation state of: O2 HSO4- Na2HPO4 CrCl3

Chemistry

What is the Net Ionic Reaction for NaOH(aq) + H2SO4(aq)-->

Chemistry

How many chloride ions are present in 21.0 grams of CaCl2?

Chemistry

What is the concentration of H+ in a solution containing 73.0 g of HCl in 0.5 L of water?

Chemistry

What is the pH of a solution of 0.1 M silver hydroxide, which is only 10% ionized?

Chemistry

A solution contains I-, Br- and OH- ions. If Ag+ is added, what will the precipitate(s) be?

chemistry

how-do-i-make-hydrochloric-acid-more-concentrated

chemistry

what is the base ionization constant expression for ammonia?

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