chemistry! URGENT

60,378 results, page 93

chemistry

which procedure is a chemical change that may be used to break down a compound?

chemistry

how many milliliters (ml) of H2 gas will be produced at 1.0 atm and 25 Celsius all the MG reacts?

chemistry

What are the oxidizing agents for Formic acid and Ferrous ammonium sulphate?

Chemistry

Plz help me balance this chemical eqn H2C2O4.2H2O+KMnO4 ---->

chemistry

Explain why Na2CO3 (stop solution) inhibits -galactosidase activity.

Chemistry

When 25.0g of Zn reacts, how many L of H2 gas are formed at 298K abd a oressure of 854mmHg?

chemistry

I have problems with the oxidation numbers of a) POCl3 b) HClO3 Please help!!

chemistry

what would be the possible limitations we might encounter in doing naphthalene sublimation?

chemistry

How many moles of dextrose (C6H12O6) are in 264mL of solution with a concentratino of 0.78M?

chemistry

For which salt in each of the following groups will the solubility depend on pH? Pb(OH)2 PbCl2 could you explain too? thanks!

chemistry

For which salt in each of the following groups will the solubility depend on pH? Pb(OH)2 PbCl2 could you explain too? thanks!

chemistry

A Bronsted-Lowry acid is a proton donor. True or False

chemistry

Air is a gas solution where oxygen is the solvent. True or False

chemistry

When a base is added to an acid so that neutralization occurs, we say that the solution is at the:

chemistry

Which reaction illustrates water acting as a Bronsted Lowry base?

chemistry

Acids are found on the pH scale between the numbers 0-6.9 True or False

chemistry

calculate the heat liberated when 118g of water at 0 degrees C is frozen?

chemistry

how many atoms of oxygen are contained in 0.662 mol of magnesium carbonate?

Chemistry

What is the volume in liters occupied by 37.7 moles of CO2 at 9.54 atm and 55 degrees?

chemistry

What is the pH value of a buffer made up of 10 ml of 0.1 M NaHCO3 and 5 ml of 0.14 M H2CO3? The pKa for bicarbonate is 6.1?

chemistry

Jenny please show me in better detail the set up of the answer.

chemistry

write the reaction of propanal reacting with: CH3CH2NH2 and CH3MgClthen H2O/H+

Chemistry

35.79 of cr2 (X2O4)3.6H20 contains 8.19H20.what is the atomic wight of x

chemistry

5 mg iodine 131 its half life is 8.1 days what is the time when 1% remain

Chemistry

PLEASE HELP! What is the mass of 1.50x10^-2 mol of (NHv4)v2SOv4? v=subscript

Chemistry

Do 36.0 kg carbon atoms and 3.0 kg hydrogen contain the same number? Explain

chemistry

What is the molarity if 750. mL of a solution containing 332.5g of copper (II) sulfate

chemistry

What mass of H2SO4 would be required to react with 0.59 mol of NaOH?

chemistry

If 20.50 grams of calcium chlorate decompose what mass of each product will form

chemistry

What are the easiest ways to visualize the shape of molecules with ionic bonds?

chemistry

lead melts at 106.0 degrees celcius, what is that temperature in faranheit

chemistry

do the arithmetic and give the answer to the correct number of significant figures. (1.5 x 10^-4 x 61.3) + 2.01 =

chemistry

CxHyCz compound weighs 132 amu, what is the molecular formula?

chemistry

how does electrons work together in non-polar covalent bonds?

chemistry

What is the balanced equation for 0.60M Phosphoric acid and 1.85M NaOH?

chemistry

molality deft with illastration please give information this topic.

CHEMISTRY

DRAW LEWIS, KEKULE AND SKELETAL STRUCTURE OF: (CH3)2NCH2CH3

Chemistry

Using VSEPR what is the shape of ammonia (NH3) and water (H2O)?

Chemistry

What is the full balanced equation?? Hg2(NO3)2(aq) + HBr(aq) → ?

chemistry

how many grams of potassium chlorate must be used to produce 30.0g of oxygen?

chemistry

how many grams of potassium chlorate must be used to produce 30.0g of oxygen?

chemistry

How many MOLES of oxygen are present in 6.56E+22 molecules of nitrogen monoxide

Chemistry

Which is more soluble in water: propionic acid or sodium propionate?

Chemistry

What is the empirical formula if given c-.1929 h-.01079 o-.08566 cl-.1898

Chemistry

Determine the maximum number of electrons that can have each of the following designations: 6f: 4d: 2f: 5d(yz): 3d:

chemistry

how many grams of oxygen are needed to create 437 liters of gas?

chemistry

how much water should i add to neutralize 1000 milliliters oh ph 13

chemistry

When 15.5 + 0.125 + 2.55 are added, the answer with the correct number of significant figures is

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

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