chemistry! URGENT

59,905 results, page 98

chemistry

When an acid and a base react in a neutralization reaction, the products will be acidic. T/F

chemistry

what mass of water is necessary to prepare 150.0g of 1.30% saline solution

Chemistry

What is product form when 2-bromobutane reacts with potassium cyanide in ethanol?

chemistry(ppm parts per million)

How would i calculate 2.34 mg x 10^6 divided by 3.50 kg

chemistry

write a chemical reaction for lead2 nitrate + sodium iodide ->

chemistry

Which alkyl halide should be used to prepare pent-2-ene and why?

chemistry

calculate the mass of Pbl2 produced by reacting of 30.0g Kl with excess Pb( NO3)2

Chemistry

Calculate the mass of a 0.253-mL sample of a liquid with density 0.789 g/mL

Chemistry

Calculate the pH and concentration of H3O+ of a 0.285M oxalic acid solution.

Science-Chemistry

Can you please help me solve r1/r2 = sqrt(M2/M1)for M1. My answer: M1=M2r2^2/r1^2 Is this correct?

chemistry

What is the mass (in kilograms) of a cube of silver that measures 0.26m on each side

Chemistry

For a certain reaction, Kp = 3.54 at 325 C. Find delta G 598 K in kJ/mol.

oragnic chemistry

convert the measurement 92.0g into pounds (1lb=453.6g)

Chemistry

What is the mass, in grams, of a pure iron cube that has a volume of 4.30 cm3?

Chemistry

lets say you have an F atom and an Ne+ ion. Which is more stable

chemistry

Skim milk has a density of 1.028 g/mL. How many grams are needed to get 0.786L?

chemistry

suppose 0.0139g of HNO3 is dissolved in 625 mL of aqueous solution. what is the pH

chemistry

Why material properties vary in spite of the similarity in crystalline form?

chemistry

How many moles of water does it take to make 477g of lithium hydroixide

chemistry

how do I calculate rate velocity using absorbence at 412/ min-1.

chemistry

how to calculate nuclidic mass of 3He when its binding energy is 0.76 MeV

Chemistry

True of False, Amorphous solids have crystal structures.

chemistry

What does ammonium Iodide equation look like dissolved in water?

Chemistry

Name three properties of metal for which metallic bonds are responsible

Chemistry

What is the method used to separate water from bleached wood pulp?

chemistry

How much heat (in kilocalories) is released when 7.87g of Al is used in the reaction?

Chemistry

how much vinegar produces 0.240 moles of acetic acid?

Chemistry

Find density of C02 at room temperature and normal pressure.

Chemistry

What volume of .225 M aluminum chloride solution contains 5.0 g solute?

chemistry

What salt results from the neutralization of acetic acid with potassium hydroxide?

chemistry

What salt results from the neutralization of acetic acid with potassium hydroxide?

CHEMISTRY

How many moles of methane gas, CH 4 , are in a 1.00×103L storage tank at STP?

chemistry

What would be the mass in grams of one million (1.0*10^6) chromium atoms?

CHEMISTRY

The pressure exerted by 6.0g of methane gas in a 0.03m3 vessel at 129degreeC is.

Chemistry help

Why is it important for the reaction beaker to be completely dry before weighing?

General Chemistry

What is the concentration in ppm of Ag in a 245 lb of Ore that contains 83.5g of silver?

chemistry

how much ml of concentrated hci required to make 0.5N hcl solution? /

chemistry

value and formula Ksp Of : -PbI2 -CdS -Ca(OH)2 -Ag2CrO4 -Cu2S

Chemistry help

How many electrons are in p orbitals in an atom of oxygen? I answered 8 and 6 but it's wrong. Can anyone pls help.

Chemistry

Molality of aqueous solution of urea is 4.What will be the mole fraction ofH2O?

Chemistry

Calculate the solubility of silver chloride in a solution that is .170M in NH3

Chemistry

how many molecules of N2 could fit in a 2.00L soda bottle at 23C and 755mmHg

Chemistry

The chemical equation for ionic reaction between Na2S and AgNO3??

Chemistry

Calculate the value of ΔS when 1.10mol of Br2(l) is vaporized at 58.8 ∘C

chemistry

what is the rate law for NO+O3=NO2+O2 in second order reaction if [NO] Doubled

chemistry

What is the % of a solution containing 18.0g of NaCl in 65 ml of water 18.0/65 * 100 = 27% Right? Wrong?

chemistry

How much heat is produced by the complete reaction of 5.91kg of nitromethane?

Chemistry

How much heat is required to boil 90.0g of water at its boiling point?

chemistry

the wavelength(nm)of a ball bearing with a mass of 10g, and a velocity of 10cm/s is what?

chemistry

In generating the synchronous spectrum, it is not necessary to specify the wavelength range, why?

chemistry

calculate the solubility in grams of KCL3(s) per 100 ml of water

Chemistry

Determine Qsp if 8.7 ml of 2.1 M AgNO3 is added to 1.7 ml of 1.5 M CaCl2 .The Ksp of AgCl is 1.77 x 10^-10.

Chemistry

Determine the pH of a buffer made from 250 ml of 0.50M HF and 150 ml of 0.75 M NaF.

Chemistry

What special precautions should be taken when generating hydrogen gas?

Chemistry

What happens when a burning candy is placed in a jar of carbon(iv) oxide?

Chemistry

What volume of 1.45 H2SO4 is required to neutralize .050L of .75M KOH?

chemistry

Why does acetone evapourate faster than water in terms of intermolecular forces

Chemistry

Determine the pH of a buffer made from 250 ml of 0.50M HF and 150 ml of 0.75 M NaF.

Chemistry

If 125 g of ice at 0.0°C is added to 1.95 L of water at 90 °C, what is the final temperature of the mixture?

chemistry

109% of carbon,18,2% of hydrogen and 73% of oxygen how do i calculate emperical formular?

chemistry

How can I change ca(hco3)2+cl(aq)=cacl2(aq) + co2(g) + h2O in to ironic equation?

Chemistry

Did Dalton and Thomson believe that the atom was made of solid mass?

Chemistry

analyze and describe the different types of genetic mutations and their effects

Chemistry

Balance TeO3^3- + N2O4 --> Te +NO3^- using oxidation numbers

college chemistry

Calculate the molarity (M) of 156.2g of H2SO4 in 1.275L of solution.

chemistry

Which of the following numbers is most significant (a)2000 (b)2.00033 (c)6.67×10 (d)0.000122

Chemistry

How energy is needed to vaporize 100 g of ethanol from its boiling point?

Chemistry

For an equation N2(g)+3H2(g) double arrowed to give 2NH3(g) what is the catalyst?

chemistry

Why can't lead chloride be directly prepared by adding hydrochloric acid?

chemistry

find the molar mass of 7.5gm of a gas occupying 5.8 lt volume at s.t.p.

chemistry

What volume of 0.5M H2SO4 will exactly neutralise 20cm3 of 0.1MNaOH solution?

chemistry

How many grams of table sugar (C12H22O11) will be needed to make 3.5 L of a 11.5 M solution?

AP Chemistry

The formula for rust can be represented by Fe2O3. How many moles of Fe are present in 24.6 g of the compound?

Chemistry

How many joules of heat are required to raise the temperature of 550 g of water from 12°C to 18°C

Chemistry

How many joules of heat when a 640 g piece of copper cools from 375° C to 26° C

Organic chemistry

What type of alcohol is used in the production of alcoholic beverages?

chemistry

how much grams of cao is produced by oxidation of 1gm of calcium

Chemistry

How many moles of acetic acid are present in 10.00 mL if the concentration is 0.500M HC2H3O2?

chemistry

Balance by partial methods P4 + hno3 = h3po4+ no2+h2o

Chemistry

A compound contains 84% carbon and 10% hydrogen.find the emperical formula.

chemistry

vapour density of gas is 11.2 volume occupied by 22.4gms at STP?

Physical Chemistry

If 5.00 mL of 3% H2O2 is decomposed, how many mL of gas will be produced at 1.01 bar and 25C?

Chemistry

For the combustion of 100. gm of methane, how much heat would be generated?

Chemistry

Calculate the amount of hydrochloric acid in 25cm3 of 0.100M HCl

Chemistry

If you have light that has a frequency of 2.88 x 10 to -9 power Hz, what is the wavelength? I don't know how to do this and what formula to use.

organic chemistry

the color change at the endpopint should persist for 30 second why

Chemistry

How do halogens (Cl2, Br2, I2) react with halides (Cl-, Br-, I-)? Can we explain this reactivity?

chemistry

What is the mass percent of nitrogen in ammonium carbonate, (NH4)2CO3?

chemistry

The density of an elemental gas is 2.14 kg/m3 at STP. What is its approximate molecular weight?

chemistry

Name a metal which is found in liquid state at ordinary temperature?

Chemistry

How much KNO3 will dissolve in 200ml of water at 50 degrees Celsius?

Chemistry

List Sn , Sn2+, Sn4+ in order of decreasing ionization energy

Chemistry

How can I tell from a graph of temperature vs. time if a reaction is endothermic or exothermic?

Chemistry

Why does the temperature in exothermic reactions increase, reach a maximum, and then decrease?

Chemistry

How many ml of water must be added to 40.0 ml of 2.50 m koh to prepare a solution that is 0.212 m?

Chemistry

Ion flame test Why is it important to not let the wooden splint burn ?

chemistry

Calculate the energy difference for the transition of n=6 to n=2 for 1.00 mol of hydrogen atom?

chemistry

How many grams of Ca(OH)2 can be dissolved in 550mL of a .0500 M NaOH solution. Ksp - Ca(OH)2 is 5.5 x 10-5

Chemistry

Does adding a proton to lithium-7 make it a positively charged ion?

Chemistry

Determine the number of grams of water in 7.00 g of copper(II) sulfate pentahydrate.

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