chemistry! URGENT

60,378 results, page 78

Chemistry

(b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid?

Chemistry

(b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid?

Chemistry

(b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid?

pharmaceutical chemistry

what are the conditions when cathartics are properly used?PLEASE HELP ME.

chemistry

balance net Ionic solution AgNo3 + NaOH

chemistry

What volume of 9.0Molarity of H2SO4 is required to react with 20.0g of NaOH?

CHEMISTRY

write the balanced ionic equation of K2CO3+HCl

Chemistry

on which stucture of C8H10 can we get mono-nitro product with nitration?

chemistry

calculate the # of moles of oxygen in 2 L @ 24 deg C & 750 torr

chemistry

how can i sketch a heating curve for benzene (mp=5.5 celius and bp=80.1 celeus?

Chemistry

What is the limiting reagent when 10.8 g water reacts with 4.7 g Na to produce NaOH and H2?

chemistry.....help plz

what is the density of methane gas at 20 degree and 115kpa?

Chemistry

How many grams of N2 are produced when 15.0 moles of NH3 react with excess NO

chemistry

how many valence electrons does copper (Cu), nickel (Ni), and cobalt (Co) have?

Chemistry

What is the molar volume of the gas ammonia (NH³) at STP?

Chemistry

What volume does 0.25 moles of oxygen gas occupy ar STP?

Chemistry

How many moles of H atoms are there in 21.66 g of Mg(OH)2? What is the mass of F (in g) in 8.03 x 1023 BF3 molecules

Chemistry

How come the formula for potassium peroxide is K2O2; I can't see how you'd get that...

Chemistry

What mass of Iodine contains same number of atoms as 50.0g of Cl?

CHEMISTRY

How do we determine whether a substance is pure in a chemical formula ?

Chemistry

what conditions are shared by cities that suffer from photochemical smog?

Chemistry

What is the molality of an aqueous solution that is 10.0% ethanol, C2H5OH, by mass?

chemistry

calculate the dimensions of a cube that contains 22.4L of gas at STP.

Chemistry

How many moles of Al(OH) are required to completely react with 2.75mol of H2SO4?

CHEMISTRY

Ni(NO3)2.H2O+2KSCN WHAT IS THE PRODUCT?? WHAT COMPLEX IS FORMED ?

chemistry

What is the maximum mass of H2O that can be produced by combining 90.8 g of each reactant

Chemistry/geology

Why is Fe3+ likely to precipitate in the presence of oxygen?

chemistry

Why is graphite more stable than diamond at 25˚C and 1 atm?

chemistry

what is the volume of a 3.00M solution made with 122g of LiF

Chemistry

How many grams of solute are present in 875 mL of 0.180 M KBr?

Chemistry

What is the mass of the carbon atoms in one mole of c3h8

Chemistry

What is the complete and net ionic equations for: Cu+Zn+2HCl--> ZnCl2+Cu+h2

chemistry

0.30M nh3 and 0.20M HCL calculate the ph of solution kb=1.8 × 10^-5

AP chemistry

what is the volume occupied by a mixture of 25.7 g of NO2 and 13.9g of SO2 at STP

Chemistry

How can I find the initial rate of formation of products {mol/((L)(s))}?

Chemistry

What is the pH at the equivalence point in the titration of 10.0 mL of 0.6 M HZ with 0.200 M NaOH? Ka = 7.0 × 10−6 for HZ.

Chemistry

What is 431804 and 10235.0 rounded to four significant figures?

Chemistry

dentify which bond you would expect to be the most polar. H-C H-F H-Cl H-S

Chemistry

If you have 1.90 mol of H_2 , how many grams of NH_3 can be produced?

Chemistry

If you have 1.90 mol of H_2 , how many grams of NH_3 can be produced?

chemistry

is putting gas in a vehicle a physical or chemical reaction

chemistry

what is the pH of a solution that has 12.2 grams of hydrochloric acid in 500 ml of water

Chemistry

if in a solution the [H+]= 1x10-5M, then the [OH-] equals the same. true or false

general chemistry

Calculate the molarity of each of the following solutions.70.8 in 2.51 of solution

chemistry

How many electrons in a cesium atom can have the quantum numbers of n = 3 and ml = -1

Chemistry

How do I find the number of particles in 1 pound of NH3(Ammonia)?

Chemistry

N2 + 3H2 --> 2NH3 how many grams of ammonia is produced in the reaction?

Chemistry

If an unknown metal M is .521 g how do you calculate it's atomic mass?

Chemistry

If an unknown metal M is .521 g how do you calculate it's atomic mass?

Chemistry

How many grams of methanol could be vaporized by the addition of 22.45kJ of heat?

Chemistry

2A(aq)-> B(aq) +C(aq) Initial concentration of A and B is 1.00 M, with no C. Kc = 0.200 find equilibrium concentrations

Chemistry

0.194M NaOH and 0.268 M NH4CL Find concentration of OH

Chemistry...

Wha is PAV glue.? Full explanation please!

chemistry

How many moles of water are produced by the complete combustion of 14.4g of C5H12?

Chemistry

Which solution below has the highest concentration of hydronium ions? pH = 9.82 pH = 12.6 pH = 7.93 pH = 3.21 pH = 7.00

chemistry

Determine the molar solubility (S) of Zn(CN)2 in a solution with a pH = 4.91. Ksp (Zn(CN)2) = 3.0 × 10-16; Ka (HCN) = 6.2 × 10-10.

Chemistry

How many moles of ethyl alcohol C2H6O are in a 25.0 sample? How do I calculate?

Chemistry

the number of moles that contains 5.13x1022 atoms of manganese

chemistry

How many electrons in an atom could have these sets of quantum numbers? n=3 n=5, l=2 n=6, l=1 ml=-1

Chemistry

Calculate the mass of 0.0122 moles of: a) Si3N4 b) (CH3)3 N

chemistry/science

What are the groups of atoms inside iron called?

Chemistry

How do I calculate the moles of each element in 0.303 mol water?

Chemistry

How many grams do 5.8×10 24 atoms of argon weigh? Answer in units of g

chemistry

how do I determine the total charge of Asn-Tyr-Asp with a pH 7.4

chemistry

calculate the pH at 25 celcius degree of 0.080 mol/dm-3 HNO3

Chemistry

How many grams of Na2CO3 can be found in a 273 mL sample of 0.5 M solution

chemistry

How many grams of dichloromethane result from reaction of 1.60 of methane if the yield is 48.8 ?

chemistry

find the mass in grams of a molecule of aspirin c9h8o4

chemistry

What would the boiling point be of 300 ml with 40 g CuCl2 dissolved in it?

chemistry

What would the boiling point be of 300 ml with 40 g CuCl2 dissolved in it?

chemistry

What would the boiling point be of 300 ml with 40 g CuCl2 dissolved in it?

Chemistry

ph of a 0.234 m nahco3 solution look up the appropriate ka or kb value

Chemistry 1301

How many g of NaOH are in 10 ml 0.1 M solution? How do you find this out, what are the steps?

chemistry

What is the difference between e/z notation and cis-trans isomerism?

Chemistry

Why would HF have a lower electrical conductivity than NaCl?

Chemistry

Calculate the pH of a buffer solution that contains 0.60 M NaH2PO4, and 0.26 M Na2HPO4.

Chemistry

Write the name and chemical formula of an amphoteric ion.

Chemistry

In saponification, does sudsing show after adding acid. Why?

chemistry

When 24.2 kg of Fe2O3 react with 14.5 kg of CO and 5.4 kg of Fe are recovered, what is the percent yield for the reaction?

Chemistry

Need type of reaction and balance of (NH4)2S+CuSO4=

analytical chemistry

chemical equilibria involved in precipitation reaction

Chemistry

What is the pH of a solution of 40.0 ml of 0.800 M HCl titrated with 4.00 ml of 1.00 M Hydroxyl amine?

Chemistry

Calculate the density of atoms on plane (001) in Lithium

chemistry

Which of the following will increase the strength of a sample of 90% SiO2 - 10% MgO

chemistry

why does MgO has a higher boiling and melting point than NaCl?

chemistry

If the density of pure acetic acid is 1.005g/cm, what is it molarity

chemistry

im so confused about this question Calculate the pH of a solution that has [H3O+] = 5.5 x 10-3.

Chemistry

Calculate Kp at 298K for the reaction SO2 + NO2--->SO3 + NO

chemistry

the density of mercury is 13.6 g/cm3. how many liters are in 829 grams of Hg.

Chemistry

why is it important to know accurately the mass of water used in a calorimeter?

chemistry

How many moles of sodium nitrate are in 0.65L of a 0.2 M NaNO solution?

Chemistry; -_-

Help? How would you do these? /: Draw electron dot diagrams for the following: Na Mg As F Ne

Chemistry

Do alloys have the same properties as their individual elements?

Chemistry

What happens if you add more solute to a saturated solution?

Chemistry

How many liters of oxygen are required to react completely with 5.9 L c3H8?

Chemistry

what is the molarity of 28.9 g of cacl2 dissolved in water to make 0.78 l of solution

chemistry

calculate the molarity of 29.25 grams of NaCl in 2.0 liters of solution

chemistry

calculate surface energy of 100 plane of niobium.

Chemistry

How can you determine the oxidizing agent in a reaction of iron with chlorine?

chemistry

a pressure vessel contain a large volume of co2

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