chemistry! URGENT

60,378 results, page 69

chemistry

Why does a solute dissolve faster in hot water than cold?

Chemistry

What is the Lewis dot structure for LiF? Is it Li - F with 2 dots on each side of F?

chemistry

Why do group I cations form precipitates when mixed with HCL?

Chemistry

How many molecules are in 112 grams of water? Can you show me the proportion for how to do this? Thanks for your help :-)

Chemistry

What is the molarity of a solution prepared by diluting 100g of NaH2PO4 to 1L?

Chemistry

If you had 6 moles in a 600ml of solution, what would be the molarity?

Chemistry

There are 200 mmoles NaOH/400ml. What is the molarity of the solution?

Chemistry

How many grams of NaCL are required to make 250ml of a 0.4M solution?

chemistry

which stage of ionization usually produces more ions?

Chemistry

Why are chemical equations balanced? Explain at the atomic level.

chemistry need help

In a solution, which component is considered the solvent? Which is the solute?

chemistry

What is the basic physical principle that chromatoraphy is based upon?

chemistry

the net ionic equation of the ionization of HClO3 in water

Chemistry

What is the difference between the substance oxidized and the oxidizing agent?

chemistry

What is the pressure in a 1.5 L vessel containing 0.25 moles of O2 if the temperature is 37oC?

chemistry

how many liters of CO2 are in 50kg of carbon dioxide at STP?

Chemistry

Explain open and closed system with respect to equilibrum.

chemistry help

What mass of Kbr is present in 25 mL of a 0.85 M solution of potassium chloride?

Chemistry

Which stage of ionization usually produces more ions?

chemistry

What mass of HCL is contained in 645 mL of 0.266 M solution?

chemistry

Would the compound K2O be considered soluble in water

chemistry

in what pH range do methyl orange and phenolphthalein change colour

Chemistry College

Is there a simple formula for the Enthalpy of solution and/or hydration?

Chemistry

what is the particle model for the reatction of iron and sulphur? thx

chemistry

equation for the dissolution of solid sodium hydrogen carbonate

chemistry

A scientist has 0.46 mL of a solution. How would she convert this volume to microliters?

Chemistry

How many moles are contained in the following: a. 5.89 g KBr b. 5.3 kg NaCl c. 7.9 mg KNO3

chemistry

if equal volumes of pH6 and pH7 are added what is the resulting pH?

CHEMISTRY

What do you think happens to mass when chages take place?

Chemistry

convert: 450m/s to m/h? please show exact steps

Organic Chemistry

What orbitals are used to form the C–B bonds in B(CH3)3?

Chemistry II

What is the process that occurs when solvent molecules surround a solute?

Chemistry

What si the molar mass of Pb3(PO4)2 in units of g/mol?

Chemistry

What is the molality of ammonium ions in a 1.75 m solution of (NH4)3PO4?

Chemistry II

Calculate the freezing point of a 0.75 m solution of Al2(CO3)3.

chemistry

What is the molarity of a 250ml solution containing 16g of sulfur?

chemistry

a granola bar contains 175 calories. what is that in joules?

chemistry.

The relative mass of A is 116. Determine the molecular formula of A.

Chemistry 101

How do I find the mass % of Oxygen in sodium oxide?

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

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