chemistry! URGENT

60,378 results, page 87

chemistry

Determine the number of molecules of ethanol (C2H5OH) in 47.0 g. Can someone explain to me how to do this?

chemistry

How many moles of O2 are needed to combine with 0.288 mol Al to give Al2O3?

chemistry

what happens when sulphate ions are added to hydrochloric acid and then heated?

chemistry

Which of the following molecules is polar? 1. CH4 2. BH3 3. NH3 4. CF4 5. H2

chemistry

How could you recover sucrose or sodium chloride once it has dissolved in water?

chemistry

what is the product of reaction K3(Al(C2O4)3).3H2O with KMnO4 in the present of H2SO4?

chemistry

what happens when you place sodium hydroxide and water into a calorimeter?

Chemistry

Which of the following species would NOT function as an oxidizing agent? a. MnO4- b. Mn+2 c. H+ d. S e. Br-

Chemistry

why do elements within a group have similar chemical properties?

chemistry

What is the equation of the preparation of K3[Al(C2O4)3].3H2O using Al2(SO4)3?

Chemistry

How many mL of 0.225M HCl would be required to titrate 6.00 grams of KOH?

Chemistry

What is the density of carbon monoxide gas at 127 celcius and 763 mm Hg?

Chemistry

How many mL of 0.225M HCl would be required to titrate 6.00 grams of KOH?

chemistry

what two metals that will not generate hydrogen gas when treated with an acid?

chemistry

how many grams of oxygen are formed when 500gof dinitrogen monoxide decomposes?

chemistry

How much water is added to 5.28 grams of ethanol to get a concentration of 1.67M?

Chemistry

How many grams of CuSo4 x 5h20 to prepare 100 mL of a .10M solution?

Chemistry

A 1.50 M solution containing 25 Grams of Al(OH)3 would occupy what volume in liters?

chemistry

What quantity of heat is required to warm 53.7 g of liquid water from 0°C to 100°C?

college chemistry

How do you calculate delta[S2O8 2-] in iodine clock reaction?

Chemistry

Determine the concentration of a dioxin solution whose percent absorbance is 0.40%

Chemistry

Rank the elements B, Al, Na, Mg from largest to smallest atomic radius. Would it be: Al, Mg, Na, B?

chemistry

According to this chemical reaction, which is the number of grams of Fe produce from 14 moles of H2?

chemistry

how can you fill a flask with pure oxygen without mixing it with air

chemistry

what is the molar change in enthalpy when 100 g of ice is heated from -18.2C to -7.2C?(C=37.4 J/K*mol)

Chemistry

The two most common forms of elemental carbon are graphite and

chemistry

What is the solubility of CaF2 in a buffer solution containing .30 M HCHO2 and .20 M NaCHO2?

Chemistry

Determine the density of chlorine gas at 22C and 1.00 atm pressure.

College Chemistry

Quick Question - For a spontaneous reaction, ΔS°>0 and K >1. Is this always?

Chemistry

Have I balanced this equation correctly CN + NaOCL---OCN + NaCl

Chemistry

For which one of the following reactions is the value of H°rxn equal to H°f for the product?

chemistry

What is the complete ionic equation for CaS(aq) +CuCl2(aq)=CuS(s)+CaCl2(aq)

chemistry

How many grams of oxygen are required to react with 0.128 lead(II) sulfide?

chemistry

How many kilojoules are needed to vaporize 3.00 liter of ethanol at 78 degree celcieus?

chemistry

whatmass of (NH4)3SO4 is required to prepare 500cm3 of m/4 solution

CHEMISTRY

how many grams are contained in 0.50 mol of each compound? HCl Na2SO4 C2H2 and Al(OH)3?

chemistry

at what temperature does 16.3 g of nitrogen gas have a pressure of 1.25 atm in a 25.0 - L tank?

11th grade chemistry

in 1D there are 4g of Zinc. How many moles of Barium Hydroxide are required?

Chemistry

what is the pressure exerted by 32g of 0xygen(O2) in a 22.0 L container at 30.0`C? What Law do I use?

Chemistry

What happens whena nucleus is stabilized by losing alpha particles?

7th grade chemistry

how is calcium sulfate is prepared?what is the chemical reaction of this.

chemistry

What would be the result if 5.0 L of hydrogen were burned with 2.0 L of oxygen in a closed containner?

chemistry

Calculate the solubility (in g/L) of silver carbonate in water at 25°C if the Ksp for Ag2CO3 is 8.4 x 10^-12

Chemistry

Why is it not a good idea to use an antacid routinely? (two reasons)

chemistry

Calculate the molar mass of baking powder (NH4)2CO3

chemistry

does any one know how to write cis-2,3-dibromo-2-hexene formula? Please help!

Chemistry

What is the product of a grignard reaction of bromotoluene and co2 as starting materials?

Gen chemistry

What is the hydronium ion concentration of an acid rain sample that has a pH of 3.45?

chemistry

is molar enthalpy affected if the system is a solid rather than a liquid

Chemistry

What three conversion factors are often used in mole conversions?

chemistry

when 5.0 g of CaCl2 is dissolved in 50 g of water, how do you get the boiling temperature of 101.5 degree c

chemistry

can the concentrations of reactant and products affect the directions of equilibrium constant

chemistry

Which of the following groups of elements is arranged in order of increasing electronegativity? a. Br < Li < C b. K < Mg < O c. Na < K < N d. Mg < Li < C e. Ca < Cl < C

Chemistry

Which element can form more than one kind of monatomic ion? 1. a. Se 2. b. Sn 3. c. S 4. d. Sr

chemistry

What is the pH of the solution created by combining 8.00 mL of the 0.10 M NH3 with 8.00 mL of the 0.10 M HCl? I found their moles= 8*10^(-4)

chemistry

What volume of 12M HCl must be diluted to make 2L of solutioin with a pH of 4?

chemistry

What are the missing nuclear symbols for the bombardment reation? 25/13Al + 30/15? >>> 30/15P + 1/0n

Chemistry

If 55.0 kJ of heat are added to 20.0 g of water at 20oC, what is the final temperature of the system?

Chemistry

What equation is used when talking about airplane cabin pressure?

chemistry

Which of the following is a weak acid? A)HN03 B)H3P04 C)NH3 D)C03^2- E)OH

Chemistry

Write a balanced chemical reaction showing how the 4.99 g Sn dissolves in HNO3.

chemistry

Which of these pressures is the lowest? 1.1 atm, 16.7 psi, 740 mm Hg, 111 458 Pa

chemistry

What volume of SO2 will result from the complete burning of sulfer in 8L of oxygen?

College Chemistry

Does Vapor Pressure decrease as intermolecular forces increase???

chemistry(check my answer)

For the cell: C(s) C+(aq) B+(aq) B(s). Metal ______ is the "negative" electrode. is it C(s)

Chemistry

what particle is emitted from the nucleus during a proton and neutron decay?

chemistry

how to find the volume of oxygen at STP from the Deoomposition of 10.8 g of mercuric oxide?

college Chemistry

What is thhe pH of 500mL of solution containing 0.0124 grams of Ca(OH)2?

chemistry

at what temperature would the sloubility level of 50 g KCL in 100 g H2O?

chemistry

what happen when a solution of NaoH is add in drop and then in excess to Cacl

chemistry

How much energy is released when 2.55kg of diethyl ether freezes?

chemistry

What is the concentration (in % mass) of a solution in which you dissolve 200 mg of NaHCO3 in 1.0 L of water?

chemistry

How many mL of 0.750 M HCl are needed to neutralize 14.89 mL of 0.350 M NaOH? ____ mL

chemistry

What is the IUPAC name of the following compounds? CH3 I CH3CHCH2CH2CHCH2CH3 I CH2CH3

chemistry

17.9 moles of NaOH in 500 ml of water? please tell me the answer

chemistry

find the molarity of 9.0*10 (to the -4 power) moles of Mg(OH)2 in 1500 ml of water. what is the answer?

Chemistry

Is 10.0 mL of 0.10 M NH4Cl added to 10.0 mL of 0.10 M HCl a basic buffer? I think Yes. Right?

Chemistry

What is the name of the product when cinnamaldehyde and cyclopentanone undergo aldo condensation?

chemistry

how do i write a procedure for making a 100mL of 0.5 M solution of sodium phosphate

chemistry

What gas volume does the water have at a temperature of 100 and 1 pressure?

Chemistry 212

What is the solubility of RaSO4 in 0.1381M Na2SO4? Ksp = 4.3x10^-11?

chemistry

how many grams of ammonium sulfate are needed to make a .25 M solution at a concentration of 6M?

Chemistry

Calculate the [H3O+] when 1.65 grams of KOH are dissolved in 500.0 mL of solution

chemistry

what you would do to prepare 100.0g of a 3.5% solution of ammonium sulfate in water

SCIENCE?CHEMISTRY***

an 56 Fe 2+ particle has how many protons neutrons amd electrons??? 56 2+ Fe Thanks Andy

chemistry

How many significant figures are in each of the following a.234 b. 2500 c.0.0034. d. 12.00 e. 0.01010

chemistry

How much heat does calcium oxide produce when dissolved in water?

Chemistry

Why is the sign for cathode positve and anode is negative in the galvanic cell?

chemistry

calculate the volume of .100 M KOH required to titrate 50 ml of .15 M HCl

chemistry

write and balanced equation for the formation of magnesium nitride from it elements

chemistry

what volume of HCl gas is needed to neutralise 50 ml of 0.1M NaOH at stp?

chemistry

what is the formula of a compuond formed by combining 50g. of element X and 32 g. of oxygen

chemistry

Why must a balanced chemical equation be used when determining Keq?

chemistry

How are the formation of aqueous solutions of sodium chloride and sucrose similar?

chemistry

What is the concentration of OH– ions formed when 40.0 g of NaOH is dissolved in 250 mL H2O?

chemistry

what is the molarity of a solution, if 12.0 g of KCl is dissolved into 500mL of H20

chemistry

the main difference between isotopes of the same element has to do with the number of

chemistry

What Causes the cap to pop off a bottle of orange juice?

chemistry

How can one create an experiment that will deteremine the Ksp of a solid like Ca(OH)2

chemistry

why should you be care when you heat your NacL solution to evaporate the water?

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