chemistry! URGENT

59,905 results, page 78

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

chemistry

Help for that 1) N-N bond question and 2)for (100) niobium and 3)crystallographic direction .

chemistry

which has more number of particles, 3g of acetone or 3g of acetic acid

Chemistry

How many mmol are in a 615mL solution containing 5.53 ppm CaCo3

Chemistry

What mass of KOH is required to neutralize 200mL of 3.16 M HNO3?

chemistry

what is the solubility of sodium chloride in 750ml of water at 100°C

Chemistry

Determine the enthalpy of the following reaction. 2M(s) + 3Cl2(g) ---> 2MCl3(s)

chemistry

1)How can you determine average velocity from displacement time graph?

Chemistry

what is the molarity of 28.9 g of CaCl2 dissolved in water to make 0.78 L solutions?

chemistry

Determine the gram molecular weight of 3.5 moles of H2O2

chemistry

wha are the two factors affecting the amount of heat

Chemistry

A buffer is made from 0.20 M sodium acetate and 0.20 acetic acid. Ka=1.8 x 10^-5. The ph is

Chemistry

Calculate delta G of a reaction with equilibrium constant, K= 9.5 x 10^5 at 25 degrees C

chemistry

write a balanced equation for the chain reaction AL2O3

chemistry

What is the mass, in grams, of 7.40×1020 molecules of caffeine, C8H10N4O2

chemistry

How many moles of HNO3 are present in 34.0 mL of a 4.70 M solution of nitric acid?

chemistry

How many moles of O2 are produced when 0.300mol of KO2 reacts in this fashion?

Chemistry

how do i write the complete electron configuration for Ga3+ and Mg2+????????????

chemistry

condensed (noble gas core) configuration for Ag, Br-, Ga3+

Chemistry

Calculate the permanganate activity in an aqueous 0.18 M KMnO4 solution.

Chemistry

How many moles are in 27.5 grams of LiCl? Show all work!

chemistry

Does anyone know what this compound is: C2H3ClBrF? I need a skeleton diagram. Many thanks Sue

chemistry Pleae

C7H14O2 + NaOH What will this combination make? and can it be balanced?

Chemistry

How does intermolecular force of attraction is responsible for a change of state?

Chemistry :)

How does intermolecular force of attraction is responsible for a change of state?

CHEMISTRY HELP! D;

1._____Mg + _____N2 ---> _____Mg3N2 2. _____KNO3(s) ---> _____KNO2(s) + _____O2(g)

chemistry assignment

how can i find the standard rf values of food dyes ?

chemistry

when ch3cooh, nahco3 and as2o3 is heated ,what product will be formed?

chemistry

0.74 Kcal/min to cal/sec How do I work this out ?

Chemistry

Calculate the volume of 5.6 kg of ethanol that has the density 0.785 g/cm3

chemistry

What is the number of moles present in 2.1 x 10²⁴ atoms of C?

chemistry

what is the density of an object with a mass of 125g and a volume of 176ml?

chemistry

what is the density of an object with a mass of 125g and a volume of 176ml?

Chemistry

Calculate the wavelength of a proton with energy 2.45 eV. Please some help!

quantitative chemistry

How do you write an expression for the mass of the residue in terms of x and y?

quantitative chemistry

How do you write an expression for the mass of the residue in terms of x and y?

quantitative chemistry

How do you write an expression for the mass of the residue in terms of x and y?

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