chemistry! URGENT

59,905 results, page 69

chemistry.

Calculate the percentage by mass of nitrogen in PtCl2(NH3)2...can anyone help me.??

Chemistry

Draw a bond-line formula for 4-ethyl-2,2-dimethylhexane

Chemistry

How many atoms are there in 7.72 g Si? Seems easy, but I forgot how to find out. Thanks for the help.

Chemistry

Calculate the percentage, by weight, of each of the elements (C, H, O) in glucose. C= 40% H= 6.7% O= 53.3% Correct?

chemistry

write out the electron configurations for each of the metallic ions: 1. Ba^2+ 2. Cu^2+ 3. Li^+ 4. K^+ 5. Sr^2+ 6. Ca^2+ 7. Na^+

chemistry

what mass of water is needed to react with 10.0 grams of PI3?

chemistry

how would you prepare a 500 mL of 0.020M KMnO4 solution?

chemistry

what is the molar volume measured at stp of 16 grams of oxygen

chemistry

what is meant by the term coefficient in relation to chemical equation

chemistry

why mixture of Nano2 and NH4Cl are taken in aqueous form?

chemistry

In which anion do you expect a shorter O-O distance? BaO2 or KO2

chemistry

what mass of water is needed to completely react with 2.35g of Ca

Chemistry

How many milliliters would it take to titrate 10.0 mL of 0.75 M HCl with 0.10 M NaOH?

chemistry

what mass of iron is needed to react completely with 16 g of sulfur?

chemistry

How many milliliters of dirt are there in a hole that has a volume of 51 liter? How many mL of air

11th grade chemistry

What is chemical formula of copper(ll) sulfide?

Chemistry

what is an meant by Give an empirical definition of electrode and electrolyte???

AP Chemistry

What is the redox reaction of (i don't understand how to do this): MnO4-(aq) + H2O2(aq) -> Mn2+(aq) + O2(g)

chemistry

how are the volume and pressure of a gas at constant temperature related?

chemistry

if you disolve 2.00 mol KI in 1.00 L of water will you get a 2.00 M solution? explain please

chemistry

this isnt helping, i am not understanding how to decide what to figure out first

chemistry

How many grams Of KCI are dissolved in 100g. of water at 50 degrees?

chemistry

Help!! The S block of the periodic table contains what type of metals?

chemistry

how many atoms of chlorine are ther in 87.56 milligrams of barium chlorite?

Chemistry

What is the specific heat for calorimeter using styrofoam cup?

chemistry

hey can u tell that who invented chmistry and is this subj is conceptual or not?

chemistry

how do you figure out how to Balance H2SO4+pb(OH)4=pb(SO4)2=H20

chemistry

explain why the type of bond could determine the volatility of a substance

chemistry

How many of potassium nitrate can dissolve in 100g of water at 50C?

chemistry

calculate the percentage composition of water in Na3PO4 * 7 H2O

chemistry

what is the color changes if FeCl3 added with pure aspirin?

chemistry

Foe Fe(OH)2, Ksp=8 x 10^-16. What is the molar concentration of OH- in a saturated Fe(OH)2 solution?

chemistry

how do you balance the equation __Al+__CuO=>__Al2O3+__Cu

chemistry

i need help with this question. What pH corresponds to each of the following: (a) (H-)=7.3*10^-5M, (b)(H+)=0.084M,(c)(OH-)= 3.3*10^-4M, (d) (OH-)= 0.042M? Thank you.

Chemistry

how do i calculate the number of moles of .066g of silver? what's the equation?

Chemistry

How many grams of oxygen can be produced from the decomposition of 100g of KClO3?

chemistry

for my last 2 questions, I cannot figure out how to set it up. what numbers do I use?

chemistry

for my last 2 questions, I cannot figure out how to set it up. what numbers do I use?

Chemistry

does postassium nitrate have a high or slow conductivity

chemistry

is a flame coloration a test for the metal or for the acid radical?

chemistry

how does the length of time relate to the amount of heat absorbed?

chemistry

what is the difference between electron affinity and ionization energy?

Organic chemistry

Is m-nitroaniline soluble in water, 1.0M NaOH, 1.0M HCl?

Chemistry

Please explain why benzophenone soluble in methyl alcohol. Thanks

chemistry

how do you write the balanced chemical equation of Fe3+-ASA

chemistry

how do you solve to find the molar mass for calcuim nitrate

Chemistry

In most of its compounds, this element exists as a monatomic cation. 1. Br 2. N 3. Na 4. Cl 5. O Is it 3. Na ?

chemistry

I am having trouble balancing this equation: C6 H12 06 + O2 = C7 H8 + O2 Can you please help? Thanks

chemistry

I am having trouble balancing this equation: C6 H12 06 + O2 = C7 H8 + O2 Can you please help? Thanks

Chemistry

Write an equation that explains the conductivity of CO2(aq, saturated)

Chemistry

How to calculate the density and viscosity of a 10 % by wt salicyclic cid solution.

Science-Chemistry

What compound is made when sodium is burned in air

chemistry

How does the voltage of a galvanic cell change, when there is a precipitate in the solution?

Chemistry

how many joules of heat are lost by 3580kg granite as it cools from 41.2c to -12.9c?

Chemistry

How much energy is needed to melt a 30.5 g ice cube?

Honors Chemistry

Does red cabbage contain one or many anthocyanins? How do you know this?

chemistry

Whats the solvent and solute in water vapor in air?

AP Chemistry

calculate the ph of a 0.10 M CoCl3 solution. The ka value for Co(H20)6 is 1.0x10^-5

Chemistry

Determine the [H3O+] in a 0.3 M solution of HClO4. Answer in units of M.

Chemistry

What effect does a polyprotic acid have on the titration curve and why?

chemistry

what is a balnced equation for for hydrogen gas burnes in air

Chemistry

Calculate the volume of EDTA stoichiometrically equivalent to 1.0 mg of CaCO3.'

chemistry

How do I work out the density of HCI at 600 celsius ? Thanks

Chemistry

Balance the following equation: C6H5COOH + O2 ==> H2O + CO2

chemistry

if 23 g of Fe2O3 formed, how many grams of Fe must have reacted?

chemistry

how many grams of solute are in 135 mL of 0.100 M potassium bromide

Chemistry

What does it mean to have a percent yield over 100?

organic chemistry

how do you increase the yield of triphenylmethanol in a grignard reaction?

organic chemistry

how do you increase the yield of triphenylmethanol in a grignard reaction?

chemistry

if an acid spilled on a highway, what should be done to clean up the spill?

Chemistry

How much KCI dissolves n 100 g of water at 80 degrees C?

chemistry

Rank these elements in terms of increasing atomic radius AI, F, Sr, N, Cs

Organic Chemistry

Draw the structure of [Z]-2-bromo-3-isopropyl-2-heptene

chemistry

How do you balance this equation? Zn(s) + HNO3(aq)--> Zn(NO3)2(aq) + N2O(g) + H2O(l)

chemistry

Why are coefficients used in mole ratios instead of subscripts

Chemistry

Classify each reaction and balance the equations. Al(OH)3 ==> Al2O3 + H2O

Chemistry

What does the study of the periodic table have to do with classification and prediction?

Chemistry

How do I find the emperical formula of 16.9% Fe3+ 39.7% C2O42- 43.4% H2O

Chemistry

What is the density of hydrogen gas at 25 degrees celius and 1 Atm?

Chemistry

What is the molality if 82grams of CaNO4 is dissolved in 2000grams of Water?

Chemistry

Identify a haloalkane and describe the manner in which it functions as an anesthetic.

chemistry

classify each reaction and balance the equation Al(OH)3--> Al2O3 + H2O

chemistry

In a laboratory setting, how would you determine if a compound was a hydrate?

chemistry

why there no color change in Glycine when mix with HNO and NAOH

chemistry

why there no color change in Glycine when mix with HNO and NAOH

chemistry

How many electrons are transferred in the production of 6.06×10^−4 mol H2(g) from water?

chemistry

how do you how do you find the mass of a solution, given the density is 1.022 g/mL.

chemistry

what happens if you add more borax to a slime receipe

chemistry

Is anyone know the molecular weight of 6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexenone. i can't find it . Thanks

chemistry

how many ml of 0.15 NaOH solution are required to neutralize 35.00 ml of 0.22 moles of HCL

chemistry

How would you calculate the concentration of an aqueous solution of Ca(OH2)that has a pH of 12.57.

chemistry

How many grams of NaCl must react to produce 1.00 g Cl2?

chemistry

how to write a net ionic equation of CaS+CuCl2

chemistry

What is the pH of the solution created by combining 2.20 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)?

Chemistry

How much would 3.45* 10^21 C12H22 O11 molecules weigh

chemistry

the solubility of MG(OH)2 is 0.61 g/L What must be the PH of this solution. and thx dr. bob for last question

gen chemistry

Which type of bonding does Sr form upon solidification?

Gen Chemistry

[Ag(NH3)2]+ is a colorless complex ion right?

Gen Chemistry

[Ag(NH3)2]+ is a colorless complex ion right?

Chemistry

What must be the pH of a solution that is 0.049 M Fe3+ to just cause Fe(OH)3(s) to precipitate?

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