CHEMISTRY (WEBWORK)

58,560 results, page 94

Chemistry

What is the temperature of 0.65mol {\rm mol} of gas at a pressure of 1.5atm {\rm atm} and a volume of 12.6L {\rm L} ?

Chemistry

Write the formula for a complex formed between Zn2 and OH–, with a coordination number of 4.

chemistry

What is the chemical eguation for a small piece of pottasium dropped In a beaker of water.

chemistry

How can we draw one of the shapes of molecule according to the VSEPR theory which is SO2?

Chemistry

Identify the intermolecular attractive force(s) that must be overcome to vaporize CH3Cl(l).

Chemistry

Estimate the percent ionic character of the BrF bond using this graph:

chemistry

2.15 g of a substance X contain 4.34 x 1022 molecules of X. Calculate the molar mass of X in g/mol.

chemistry

1.) 1.25 moles of an ideal gas are contained in 8.0L. If the temperature is 33K, what is the volume at STP?

chemistry

why might consuming more of daily rni of a vitamin or mineral be harmful

chemistry

How do you find the total number of σ and π bonds in a molecule? Is there an equation?

chemistry

1.) 1.25 moles of an ideal gas are contained in 8.0L. If the temperature is 33K, what is the volume at STP?

Chemistry

What is the maximum number of orbitals in an atom that can have the following designations? (a) 5p (b) 2pz (c) n=4

Chemistry

can you look at the additional attached questions from me this morning at 2:29am? not fully understanding them. thanks for your help

chemistry-naming

How do I name the following- C3H8? (the numbers are supposed to be subscripts) KCl?

Chemistry

How many grams of oxygen gas must react to give 2.80g of ZnO?

chemistry

State the number of valence electrons for an iron(II) ion in an ionic bond.

chemistry

State the number of valence electrons for a chloride ion in an ionic bond.

CHEMISTRY

write oxidation and reduction halfreaction of 3CuO+2NH3>3Cu+N2+3H2O

chemistry

State the number of valence electrons for an iron(II) ion in an ionic bond.

chemistry

A mixture of 94.6g of O2 and 82.2g of Ne is placed in a 200.0L container at 250K . What is the partial pressure of O2 in atmospheres?

chemistry

What is the pressure of 5 pounds of Argon gas in a 25 liter bottle at 23 degrees Celsius?

Chemistry

Show how to calculate the molarity of 45 g of hcl in 1.5 L of water 36.46g/mol/1.5=24.30726Mhcl

Chemistry

What is the ppm of 4.50mg of ddt in 10kg of seal fat Please show how

chemistry

Naturally occurring reactions of oxygen (O2) are always desirable. True or False

chemistry

how wud u prepare 1L of a 1.30M aqueous solution of barium sulfide explain

Chemistry

A gas occupies 21.0 L at 2.00 atm pressure and 27oC. Calculate its volume at STP.

Chemistry

Why is it hard to use the periodic table to predict the oxidation #'s of the transition elements?

chemistry

Find the molar concentration of 57.9 g of potassium chlorate dissolved in 975 mL of water

Chemistry

Which of the following is an example of sp3d2 hybridization? A. C2H6 B. IF7 C. PCl5 D. SF6

chemistry

matts moped holds 1.9 gal of gas how many milliliters is that show work

chemistry

What mass of AgCl will be obtained by adding an excess of HCl to a solution of 0.34 g of AgNO3 ?

Chemistry

Calculate the number of atoms in 2.58 mol antimony. Its an example problem, I need help!

Chemistry

2C2H2(g) + 3O2(g) 4CO(g) + 2H2O(g) What is delta G° for this reaction in J/mol? (T = 298.17 K)

chemistry

I want to boil 25c, 50c, and 75c to 100c but I don't have a thermometer. I did 0c which was 1.42 but I can't do the others.

Chemistry

A gas occupies 30 0dm3 at stp what volume would it occupy at 91 and 380mm hg?

Chemistry

Calculate the percentage of by mass of nitrogen in ammonium nitrate Nh4 No3

chemistry

what mass of AgBr is produced when 100.0 mL of 0.150 M AgNO3 is added to 20.0 mL of 1.00 M NaBr?

Chemistry

a mothball composed of naphthalene has a mas of 1.06g. how many napthalene molecules does it contain

Chemistry

A sugar crystal contains approximately 1.7x10^17 sucrose. What is its mass in milligrams?

chemistry

sodium cyanide nacn, contains how many single, double or triple bond?

chemistry

which of the following have a covalent bond? AlCl3, NH3, H3O, H2O

chemistry

if you burn 20.2g of hydrogen and produce 1.80x10^2g of water, how much oxygen reacted?

chemistry

A 0.97 m aqueous solution of an ionic compound with the formula MX has a freezing point of -2.5 ∘C .

Chemistry

Decomposition reactions result in __________ compounds. bigger smaller not sure

chemistry

Why would a unknown solid cube sink in cholorform that has a density of 1.489

chemistry

Which of the following is the STRONGEST acid? 1. CH3COOH 2. CH3CH2OH 3. CHCl2COOH 4. CH2ClCOOH 5. CCl3COOH

chemistry

Which of the following has the HIGHEST pKa? 1. HClO3 2. HBrO 3. HClO 4. HIO 5. HClO4

Chemistry

name all the possible isomers of methyl nitrobenzoate and nitroacetanilide which can be formed

Chemistry and physics

What causes a red glow when the iron and sulphur mixture is heated?

chemistry

If I have 298 mL of a 0.8 M solution of NaBr, what will the concentration be if I add 425 mL of water?

chemistry

ok i have molality is 1.05, mole fraction is 0.076, and wt% is 2.87 and solvent is C6H6 what is solute?

Chemistry

Determine the pH of a solution after 20.00 mL of 0.4963 M HI has been titrated with 12.64 mL of 0.5174 M NaOH.

Chemistry help

2. How would it be affective if there were a lot of saliva left in the gum after chewing?

chemistry

Complete and balance this reaction: sulfuric acid reacts with barium chloride

Chemistry

Write the formula for iron (III) sulfate. My answer is Fe2(SO4)3

chemistry

when the nuclear charge increases, does the electron;s attraction to the nucleus get stronger or weaker ?

Chemistry

Magnesium hydroxide, Mg(OH)2, found in milk of magnesia, has a solubility of 7.05 × 10-3 g L-1 at 25 °C. Calculate Ksp for Mg(OH)2.

chemistry

how do i find a name and formula for a combination of an anion and a cation? ex: Na2CO3 + Ba(NO3)2

chemistry

find volume of 0.2 M sulfuric acid required to react with 15.0 ml of 0.25 M sodium hydroxide

Chemistry

What is the pH of a solution made by mixing equal vlumes of .10 M HC2H3O2, .1 M NaOH, and .05 M HCl?

Chemistry

What happens when Potassium Oxide is left on a watch glass and exposed to air?

chemistry

Calculate the volume 2.3g of oxygen gas at 28 degrees celcius and 2.321 atm

chemistry

What is the % carbon by weight in 1.7 grams of potassium carbonate (K2CO3)? Answer in units of %.

chemistry

The concentration of a solution made by diluting 10.0 mL of 0.685 mol/L NaBr to 300 mL is

chemistry

How much energy is needed to completely remove an electron from n = 2 in a hydrogen atom?

Chemistry

Determine the pH of a solution after 20.00 mL of 0.4963 M HI has been titrated with 12.64 mL of 0.5174 M NaOH.

CHEMISTRY

The average kinetic energy of an ideal gas,per molecule in S.I units at 25°C will be

chemistry

which of the following molecules will exhibit hydrogen bonding? a. CH3OCH3 b. HF c. CH4 d. LiH

chemistry

If you used different branded of tea beg what is the expected % of coffeine you will isolated. Why?

Chemistry

What volume of carbon tetrachloride (density = 2.71 g/mL) contains 2.46x10^25 chlorine atoms?

Chemistry

What pressure is required to reduce 34 mL of a gas at standard conditions to 16 mL at a temperature of 20◦C

chemistry

calculate the pH after 0.02 mol NaOH is added to 1.00 L of .1 M sodium propanoate NaC3H5O2

chemistry

What is the volume occupied by 20.9g of argon gas at a pressure of 1.09atm and a temperature of 411K ?

Chemistry

How many moles of HNO3 are present if 0.116mol of Ba(OH)2 was needed to neutralize the acid solution?

chemistry

The volume of CO2 produced by the combustion of 20g of graphite containing 10% impurity will be?

chemistry

How much mL of 0.5m HCL would it take to compeletly react with 3.00g CaCO3?

chemistry

how many grams of CaCI would be required to produce a 8.5M (molar) solution with a volume of 2.0L

Chemistry

Put 10 mL of silver sulfate (Ag2SO4) in 1 gram zinc. What is the net equation?

Chemistry

Calculate ΔGo (in J) for 2 moles of electron(s) in each half-reaction and a standard potential of 0.57 V.

Chemistry

Calculate Keq for 2 moles of electron(s) in each half-reaction and a standard potential of 0.55 V.

Chemistry

Calculate delta g and Kp for the following equilibrium reaction. Keep getting 7.2E-81 and the answer is 4.5E-81 Why?

chemistry

How many kg of wet NaOH containing 12% water are required to prepare 60 litre of 0.5N solution?

Chemistry

What is the energy in joules and wavelength in meters of microwave radiation with  = 2.4 ×1011s-1?

chemistry

If 5.0 mL of 0.12 mmol dm-3 MB solution is diluted by adding 20.0 mL of 0.2 mol dm-3 HCl to it, what is the new MB concentration?

Chemistry

How much SO2 is needed to saturate 50g of H2O at 5 degrees Celsius

chemistry

What is the resulting concentration when 250.0 mL of 0.65 M Magnesium Sulfate is added to 800.0 mL of water?

chemistry

Battery acid is 4.27MH2SO4(AQ.) And density of 1.25g/ml . What is the molality of H2SO4 in the solution

chemistry

How many moles are contained in 3.25 L sample of an ideal gas at 25oC and 204 kPa?

college chemistry

estimate the normal boiling point of Pcl3 answer: 333 K how do you get it?

analytical chemistry

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

Organic chemistry

What is the product formed when phtalic anhydride reactors with D2O/D+? Thank you in advanced!

Chemistry

which of the following is the stongest oxidizing agent? 1.NaBiO3, 2. K2Cr2O7, 3. KMnO4, 4. PbO2

Chemistry

AP Chem - Which element is oxidized in the following reaction: CuO(s) + H2 (g)  Cu(s) + H2O (l)

chemistry

Calculate the amount of heat needed to convert 45g of ice at –22.0°C to water at 22.0°C.

Chemistry

How many joules of energy are needed to change 114 g of water at 16.5°C to steam at 100°C?

college chemistry

How many calories are required to change 259 g of ice at 0 °C to steam at 100 °C?

Chemistry

What mass of carbon dioxide is released by heating 2 moles of calcium carbonate?

CHEMISTRY

Ignoring activities, determine the molar solubility (S) of Zn(CN)2 in a solution with a pH = 1.94. Ksp (Zn(CN)2) = 3.0 × 10-16; Ka (HCN) = 6.2 × 10-10.

Chemistry

What are some of the distinctive properties of gases with respect to: density, volume, shape?

Chemistry

Find the number of atoms in 138 grams of nickel. I'm not sure where to start. Can anyone help me?

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