chemistry! URGENT

59,905 results, page 93

Chemistry

what is the energy in joules of one quantum of 3^8 m/s? reply in scientific notation

Chemistry

What you can predict about a reaction whose activation energy is zero?

chemistry

Balance the following chemical equation: C3H7OH(l) + O2(g) CO2(g) + H2O(g)

Chemistry

What is the density of a gasoline sample that has a volume of 13.3 mL abd a mass of 8.86 grams?

chemistry

What mass of water is produced from the complete combustion of 2.50×10−3 of methane?

chemistry

What mass of oxygen is needed for the complete combustion of 2.50×10−3 of methane?

Chemistry

Write and balance equation for the complete combustion of decane, C10H22

chemistry

From the balanced equation for tums and .0072mL calculate no. moles titrated.

Chemistry

What mass of KH2PO4 is needed to prepare 500.0 mL of a 0.067M solution?

Chemistry

What would happen if MnO2 was mixed with KBrO3 ND 9 M sulfuric acid?

chemistry

What would happen if MnO2 was mixed with KBrO3 ND 9 M sulfuric acid?

chemistry

Given density of Mercury, 200.59....how do I calculate for the mass of 33.5mL

Chemistry

Is there any way to increase the ionic strength of a solution without increasing the pH?

chemistry

calculate the freezing point of a .05500 m aqueous solution of NaNO3

chemistry

DrBob222- Is STP = to 273K? If so, would i use P1V1/T1 = P2V2/T2??

Chemistry

NaCl+H2SO4 Write the balanced net ionic equation.

Chemistry

NaBr+H2SO4 Write the balanced net ionic equation.

chemistry

KI+H2SO4+KIO3 Write the balanced net ionic equation.

Chemistry

Ba(OH)2(aq)+2CH3COOH(aq)=Ba(CH3COO)2(aq)+2(l)H2O what is the net ionic equation with phases?

Chemistry

I'm abit confusd hw to find the% of H2O of crystallization Na2SO4.10H20

chemistry

If hydrated sodium carbonate contains 6.0 g of carbon, find its mass.

chemistry

Calculate the mass of solvent that would contain 3.0 mg of a drug if the concentration was 3.5%

Chemistry

When 3.2 moles of Al react with excess HNO3 at STP, How many liters of H2 are formed

chemistry

what volume does 2.5 moles of carbon monoxide occupy at 50.5 kPa pressure and 20.0 C?

chemistry

4KCl + 4HNO3 + O2 ==> 4KNO3 + 2Cl2 + 2H2O what kind of reaction is this?

chemistry

Calculate pH for strong base solution: 15.0 mL of 1.20×10^−2 M Ca(OH)2 diluted to 460.0 mL

Chemistry

Calculate the pH of an aqueous solution containing 3.8 10-2 M HCl, 1.0 10-2 M H2SO4, and 3.3 10-2 M HCN.

chemistry

2Al(S)+3H2O(g)---->Al2O3(s)+6H2(g) A.) what is the correct equilibrium expression?

chemistry

if we have 1 galon of C8H18 hom many galons of water will be produce?

chemistry

Do hydrogen bonds form between methanol (CH3OH) molecules?

Chemistry

What is the molarity of an aqueous ammonia solution that has an OH- concentration of 0.0011 M? Kb = 1.8x10-5

Chemistry

What is the molarity of an aqueous ammonia solution that has an OH- concentration of 0.0011 M? Kb = 1.8x10-5

Chemistry

In 1 mole of CaCl2 there are ____ moles of chloride ions. A. 1 B. 2 C. 0.5 D. None of these

Chemistry

How many deciliters of carbon dioxde are produced when 0.38L SO2 is formed?

Chemistry

A 0.035 M solution of a weak base has a pH of 10.88. What is the Kb for the acid? Where Di I even begun**???

Chemistry

Calculate the pH of an aqueous solution containing 3.8 10-2 M HCl, 1.0 10-2 M H2SO4, and 3.3 10-2 M HCN.

Chemistry

What kind of orbital is designated by the quantum numbers (3,1,1,1/2)? Answer s, p, d, or f only.

Chemistry

would the melting range of a new compound be worth determining and if so, why?

AP CHEMISTRY

Calculate the solubility of Mn(OH)2 in GRAMS PER LITER when buffered at each of the following. a)pH 7.4 b)pH 9.2 c) pH 11.5

AP CHEMISTRY

Calculate the solubility of Mn(OH)2 in GRAMS PER LITER when buffered at each of the following. a)pH 7.4 b)pH 9.2 c) pH 11.5

chemistry

what is the wave lenghth of the alpha particle Po which has velocity of 15x10 to the power 6 ms-1

Chemistry 2

If 20 mL of .10 M H2SO4 was added to 50 mL of .10 M NaOHand the mixture was stirred, then tested with a pH meter. What is the pH?

Chemistry

What are the components that serve as electrolyte,anode and cathode in dry cell?

chemistry

what is the solubility of X in mole/dm3 if 25cm of its saturated solution contains 4.0g of X.

Chemistry

What is the balanced equation for the reaction of acetylsalicylic acid and sodium hydroxide?

chemistry

What is (a)PH(b) POH of a solution wholes hydrogen ion consentration is 5.00x10-4?

chemistry

Mg(OH)2 + 2HCl = MgCl2 + 2H2O if 33.5g of Mg(OH)2 react, what mass of H2O could be produced

Chemistry

What is true about H+ and OH- when the endpoint is reached in an acid-base titration?

Chemistry

What volume of 3.0M sodium hydroxide will be needed to neutralize 2.0 L of 1.0M hydrochloric acid?

Chemistry

You mix 1.00 L of 2.00 M BaCl2 with 1.00 L of 2.00 M AgNO3. What compounds remain in solution, and what are their concentrations?

Chemistry

How many grams of water are formed when 250 mL of 2.0 M Mg(OH)2 are neutralized by a solution of HCL ?

AP CHEMISTRY

The Kb for ammonia (NH3) at 25°C is 1.8* 10-5. By using the value of Kb, calculate ΔG° for the equilibrium

Chemistry help please

What is the pH of a solution whose hydronium ion concentration is 0.0010 M?

Chemistry help please

What is the pH of a solution whose hydronium ion concentration is 0.0010 M?

Chemistry

energy required to raise the temp of H2O from -15C to 125c

Chemistry

How does looking at the number of molecules of products vs. reactants show the Estamation of ÄS?

chemistry

what is the final molarity when 250ml 0.45M is mixed with 350mL water

Chemistry

What is the frequency of the photons emitted by hydrogen atoms when they undergo transition from n=5 to n=3?

chemistry

Why does specific heat increase the greatest when it's near its freezing point?

Chemistry

Given 3.90mL of 1.80M HCl diluted to .520L, whats the pH?

Chemistry

Given 3.90mL of 1.80M HCl diluted to .520L, whats the pH?

Chemistry

What is the pH of a saturated solution of lead(II) hydroxide? The Ksp= 4.0 X 10-15. a) 4.7 b) 7.2 c) 9.0 d) 9.1 e) 9.3 What should I do to solve for this? Thank you

Chemistry

Above what Fe2 concentration will Fe(OH)2 precipitate from a buffer solution that has a pH of 8.03? The Ksp of Fe(OH)2 is 4.87×10-17 M3.

Applied Chemistry pls help!

At what depth in water is the pressure equal to 2.0m atmosphere?

Chemistry

Calculate the [H+] in a solution containing 1.00 M hydroflouris acid (Ka=7.2 x 10^-4) and .50 M sodium fluoride

Chemistry

Calculate the concentration of aqueous solution of barium hydroxide whose pH is 12

Chemistry

Calculate the concentration of aqueous solution of barium hydroxide whose pH is 12

Chemistry PLZ HELP!!!!!

what conditions must exist for a polyatomic molecule to be nonpolar?

Chemistry

How many mL of .175M H3PO4 are needed to neutralize 15.00mL of .33M NaOH?

Chemistry

What will happen to the room temperature if the refrigerator door is kept open?

Chemistry PLZ HELP!!!!!

what are the names of three important nitrogen fertilizers with their formulas?

chemistry

which are ionic compounds? SO2 PCl3 NaBr PbO AlF3

Chemistry help

COVALENT BONDS BETWEEN THE MONOMERS OF AN ENZYME MACRO MOLECULE ARE?

Chemistry

Complete and balance the following equation: NO2{-} + Cr2O7{2-} = Cr{3+} + NO3{-}

Chemistry

Complete and balance the following equation: NO2{-} + Cr2O7{2-} = Cr{3+} + NO3{-}

Chemistry

What is the equationfor this?: Sulfur reacts with oxygen to produce sufur trioxide

chemistry

Which of the following will cause a greater amount of oxygen to dissolve in 100 g of water?

Chemistry

what is the molality of a solution prepared by dissolving 13.0 g of Ba(NO3)2 in 450 g of water?

Chemistry

What is the smallest whole-number ratio of ions in a crystal lattice?

Chemistry

What is the possible ionic equation of TrisEDTA solution? REDOX reaction.

Chemistry

How many total atoms of all elements are present in an acetate ion?

Chemistry

What is the symbol for the element whose electron configuration ends with 4p6?

chemistry

Determine the heat of combustion of ethanol by using the bond energies

Chemistry

What are the possible values of the azimutal quantum number for an electron in the 4f subshell?

Chemistry

What physical properties will the ionic compound CaSO4 be expected to have?

Chemistry

Calculate the mass of each compound containd in 60g of a 4.5%m/m CaCl2(aq)solution

chemistry

Calculate the theoretical pH when 5.00 ml of 0.0100 M HCl is added to 30.00 mL of deionized water.

CHEMISTRY

THE HEAT OF NEUTRALIZATION OF 0.120KG OF ethanoic ACID WITH EXCESS OF NaOH

Chemistry

How do you prepare 2% Cu S04? How does this solution differ from 2M CuS04? I am stumped. Thank you. Deb

Chemistry

Balance the following equation in acidic conditions. S2O3^2- +Cu ^2+ > S4O6^2- +Cu^+

Chemistry

What is the limiting reagent when 150.0 g of nitrogen react with 32.1 g of hydrogen? N2(g) + 3H(g) > 2NH3(g) Thank you

Chemistry

7.8 g of calcium fluoride is dissolved in 100 L of water at 25°C. Will a precipitate be formed?

Chemistry

25 mL of NaOH 0.16 M is added to 50 mL of 0.1 M HCl. What is the concentration of hydroxide ions in the solution?

chemistry

how do you identify the base in this reaction? h2o(L) + CH3NH2(aq) yields OH-(aq) + CH3+(aq)

Chemistry

the chemical dichlorobenzne will not disolve in water, what muct the polarity of dichlorobenznebe by and why?

Chemistry

25g of ethanol is dissolved in 1.50 kg of whater. what will the boiling point of the solution be?

Chemistry

Calculate the volume of Ba(OH)2 0.20 M necessary to neutralize 300.0 mL of H3PO4 0.30 M. (4 marks)

chemistry

Write the double-replacement reaction of HgCl2 reacting with Na2CO3.

chemistry

Write the double-replacement reaction of PbCl2 reacting with Na2CO3.

chemistry

Can someone pleeeeeaaase explain Charle's law in a simple way.

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