chemistry! URGENT

60,378 results, page 98

chemistry

Discuss the difference in lattice enthalpy between NaCl and CsF

chemistry

Nickel is about 2 millimeter thick or 2/1000 of a meter.how many nanometer is this?

chemistry

why does alka-seltzer dissolve faster in hot than cold water

chemistry

Calculate the number of moles of O atoms in a 2.5x10(-6)kg sample of C8H10N4O2

chemistry

state the separation technique for silver choride and sodium trioxonitrate

Chemistry

What functional groups do uracil,guanine,cytosine, and tyrosine belong to.

Chemistry

Give a acid-base pairs which produce Na2CO3 as a salt

chemistry

A 300mL solution was made by dissolving 5.0g of MgCl2 in water. What is its molarity?

Chemistry

Predict the physical properties and relative reactivity of Rb, Cs, and Fr (From the periodic table)

Grade 9 Chemistry

which is more reactive k or ca? ( from periodic table.) when poured in water?

Chemistry

How many numbers of oxygen molecules are present in 3 liters of CO2 at STP?

Chemistry

If 6.0 g of Oxygen (O2) reacts with 12.0 g of hydrogen (H2) to give 5.0 g of dihydrogen monoxide. What's the % yield?

chemistry

How many grams of HCl are formed from reaction of 3.58g of H2 with 8.90g of Cl2?

CHEMISTRY

Find the number of SiO2 formula units in m = 1.90g of quartz.

Chemistry

You need to make 500mls of a 7percent bovine serum solution

Chemistry

What mass KCl is needed to precipitate AgCl from 15.0 mL of .200 M AgNO3

chemistry

advantage of potentiometric titration over other titrimetric titiration

chemistry

How many molecules are in 105 g of sugar (C12H22O11)? Answer in units of molec

chemistry

How much does 1.9 mol of carbon dioxide weigh? Answer in units of g

chemistry

What is the volume occupied by 0.252mol of helium gas at 1.35atm and 305K ?

chemistry

how many milliliters of10.0m Hc(aq) are needed to prepare 890.0 ml of 1.00m Hcl(aq)

chemistry

We only can make ozone layer by adding 3 oxygen atoms or we cannot

Chemistry

Cs(s)+H2O(l)→ ? i thought it was H2+CsOH but the computer says that's wrong.

Chemistry

What is the molarity of a 2.50 x 102 cm3 solution containing 560.0 g of C6H12O6?

Chemistry

State the full electron configuration of a free nitrogen atom.

chemistry

Give a structure to match the name for the following compound. 2-pentanol

Chemistry

How many moles of LiF would be required to produce a 12.0 M solution with a volume of 10.5 L?

chemistry

At what temperature will freeze rastor 48.8 g of ethanol C2H5OH (Mr = 46) in dm3 of water (p = 1.86)

chemistry

How many formula units would there be in a 54.3 gram sample of sodium nitrate

chemistry

If 124 g of ice at 0.0°C is added to 1.36 L of water at 90 °C, what is the final temperature of the mixture?

chemistry

Consider the reaction, 4 NH3 + 5 O2 => 4 NO + 6 H2O How many grams of NO will be made from 10.7 moles of O2?

Chemistry

Balance the following equation in basic conditions CoCl2 (s) +Na2O2 (ag) ----> Co(OH)3 (ag)+Cl- (ag) + Na+ (ag)

Chemistry

What is the mass of a sample of (NH4)2SO4 that contains 8.01 x 10^24 atoms of oxygen

Chemistry

What is the mole fraction of O2 in a mixture of 15.1g of O2, 8.16g of N2, and 2.46g of H2? (PLEASE EXPLAIN WHAT YOU DO!) Thanks

Chemistry

Draw all of the possible alkyne isomers of CH≡CCH2CH2CH2CH3.

Chemistry

Calculate the energy (kJ) required to raise the temperature of 22g of water from 12 C to 90 C.

chemistry

0.195 m of ca oh 2 solution to neutralize 750 ML of a 0.235 m of hno3 and balance it

Chemistry

What is the pressure in a 22.1-L cylinder filled with 16.3g of oxygen gas at a temperature of 329K?

Chemistry

What is the concentration of sodium phosphate contains 0.60 M Na+? I'm not sure what to do and how to figure how to do this question.

chemistry

What is the balanced chemical equation Shampoo? please i need a help ASAP!

chemistry

cal culate the ph of a mixture of 100 ml distilled water and 2 ml of 2M of NaOH

Chemistry

The color of light emitted by a hot solid object depends on?

chemistry

potassium hydroxide and perchloric acid net ionic question

chemistry

sodium hydroxide and carbonic acid net ionic equation

Chemistry

'calculate the mass in amu of 2.879 1023 xenon atoms'

chemistry

All polymers made from polyethylene will have the same density.

chemistry

When the following equation is balanced, what is the coefficient for Ta? H2 + Ta2O3 → Ta + H2O

chemistry

Most alcohols are very safe to ingest. True or False

chemistry

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

chemistry

By what factor is the rate of a reaction changed if an enzyme lowers the Ea by 9.0 kJ/mol at 37°C?

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

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