chemistry! URGENT

59,905 results, page 92

Chemistry

Write an equation showing the bicarbonate ion acting as an acid.

chemistry

what will happen when you drop a ball of naphthalene in a 25ml gasoline.will it dissolve or not?

chemistry

how many milliliters of concentrated NaOH(19.3 M) are needed to make 8.00 L of 0.25 M base solution?

chemistry

Calculate [H3O ], [ClO4–], and [OH–] in an aqueous solution that is 0.130 M in HClO4(aq) at 25 °C.

Chemistry

Which ion is more strongly hydrated , 1)Fe3+ and Fe2+? 2)Li+ and Na+ ? Thank for helping!

organic chemistry

what are the formulas of the salts that may precipitate when the reaction mxture is cooled?

Chemistry

What caroxylic acid and alcohol is needed to produce isopentyl propionate?

Chemistry

What carboxylic acid and alcohol is needed to produce propyl acetate?

Chemistry

What carboxylic acid and alcohol is needed to produce isobutyl propionate?

Chemistry

What caroxylic acid and alcohol is needed to produce isopentyl propionate?

Organic Chemistry

If a student extracts first with NaOH then with NaHCO3, what will be the result?

chemistry

a 0.296g of CO2 has a volume of 565ml and a pressure of 425mmHG, what is the temperature??????

chemistry

is this correct? making sure I did this right CH3CH2CH2CH2-Br ans: 1-bromobutane

Chemistry

So what do I do after I divide the mass by 2? Refer to previous question please

Organic chemistry - Nitration

Why does the amount of dinitration increase at high temperatures?

Chemistry

calculate the energy associated with a photon whose wavelength is 14.5*10^-8cm.

Chemistry

Calculate the mass ( in grams) of one mole of methane molecules (to .01 g)

chemistry-wavelengths

what is the wavelength in nm of radiation having a frequency of 2.45x10^9Hz

chemistry

Draw the lewis structure for: SiO3 -2 CNO- TeO4 -2 F2PPCl2 thanks!

chemistry

What is the boiling point of an aqueous solution that freezes at -6.7 degress C. Please help.

chemistry

what is the molarity of an aqueous solution that is 6.75% glucose by mass? Assume a density of 1.03 g/ml

Chemistry

Which of the following substances is capable of reducing bromine, Br2? Cl- H2 Ni or Au I think its H2

Chemistry

Calculate the pH of a solution made with 0.240 M H3PO3 and 0.480 M NaH2PO3.

Chemistry

Describe how you could make approximately 5 g of a 3% (w/w) ferrous ammonium sulfate solution

Chemistry

CH3CH2CH(BR)CH=C(BONDED TO A METHYL ON ONE SIDE AND AN ETHYL ON THE OTHER)

Chemistry

If an atom gains energy, is it in a more stable or unstable state?

chemistry

How many moles of sugar are required to react completely with 3.26 mol of oxygen?

chemistry

Sorryy but I still don't understand will you show the calculations for my previous question

Chemistry

For the reaction 2 N2O <===>O2 + 2 N2 what happens to the equilibrium position if the pressure is increased

Chemistry

Determine which is larger member of each pair A) Mg2+ or Al3+ B) N3- or O2-? Explain

Chemistry

HZ is a weak acid. A concentration of 0.020M in aqueous solution gives a pH of 4.93 what is the Ka?

chemistry

how many moles of Na2SO4 are present in 850cm3 of a solution which has a concentration of .6 mol d/m3

Chemistry

True or false? 1 mole of ozone has 1.8 x 10^24 atoms? correct if wrong THANK YOU!

Chemistry

Which of the two is the stronger base?Give your reason. (a) HPO4 2- or PO4 3- (b)HS- or S2-

Chemistry

Give two bronsted acid-base that are not Arrhenius bases.

Chemistry

Please help me arrange these elements in decreasing order of metallic property. I, Mg, Al, Rb, Ca Thank You

Chemistry

How many grams of C4H10O can be melted by 2.0 x 103 J? Given ÄHfus = 7.27 kJ/mol

chemistry

Determine the molarity of a 2.15-L aqueous solution containing 1.45 moles of KCl.

chemistry

how to prepare 1M,50ml buffer solution by taking Na2HPO4 and NaH2PO4.

Chemistry

Why does only one of these ions (Co, Cu, or Ni) produce a positive flame test?

chemistry

Which of the following does NOT have an angular shape? 1. NH2 - 2. ClO2 - 3. HOCl 4. S3 -2 5. N3 -

Chemistry

Rank the following atoms in terms of decreasing atomic radius. 1. Na, N, O, Mg, F 2. F, O, N, Mg, Na 3. F, Mg, Na, O, N 4. Na, Mg, N, O, F 5. F, O, N, Na, Mg

chemistry

Calculate the pH of an aqueous solution containing 1.6 x 10-2 M HCl, 2.0 x 10-2 M H2SO4, and 1.8 x 10-2 M HCN.

chemistry

Exactly define the number of hydrogen and hydroxide ions at pH 6. What about pH 8?

chemistry

25 G OF CALCIUM CHLORIDE IS DISSOLVED INTO 1500mml OF H2O. how can i set it up.

chemistry

How many grams of ammonia can dissolve in 100g of water at 22 degrees celsius?

chemistry

Conjugate base of acid H3PO4= I have H2PO-4 Is this correct?

Chemistry

What mass of KOH is necessary to prepare 799.2 mL of a solution having a pH = 11.65?

chemistry

here is a redox reaction Fe+ Cu2+„³ Fe2+ Cu Is Fe oxidized and Cu reduced ? and why. Thanks for the help:)

CHEMISTRY

if a beaker has a rated capacity of 100ml, does it mean that it has to be filled to the bream?

chemistry

What is the minimum volume of 2.6 required to completely dissolve 20.0 of potassium metal?

chemistry

Calculate the molarity of a 295 mL solution contain 45 g of ethanol (C2H5OH)

chemistry

why is it necessary to make up to the 250 ml mark while during dilution?

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

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