chemistry! URGENT

60,827 results, page 72

chemistry

theoretical percent sulfate in AlK(SO4)2*H2O

chemistry

why is it important to record detailed observations, not just conclusions?

chemistry

If a reaction mixture contains 28 of , 150 of , and 36 of , what is the limiting reactant?

chemistry

what is the mass in kilograms of 750 mL of a substance that has a density of 0.930 g/mL?

Chemistry

Why do Oxygenated fuels contain less energy than hydrocarbons?

Chemistry

What is the balanced equation for the reaction of 3.000 g of K2CO3 and HCl?

chemistry

write the formula of the conjugate acid for base H2PO

Chemistry

Calculate the temperature, in K, of 2.20 moles of gas occupying 3.50 L at 3.30 atm.

Chemistry 106

Calculate number of moles of aluminum in 1.50kg of Al

chemistry

If 50.0 g of NaCl is mixed with 100.0 g of water at 80.0 °C, how much will not dissolve?

chemistry

Calculate pH of 0.02 mol/L Ba(OH)2 solution. (Assume 100% dissociation).

chemistry

How many moles are in a sample of cobalt containing 5.0x10^23 atoms?

Chemistry

How many moles of NF3 are in 850.49 grams of nitrogen triflouride

chemistry

If you have 1.90 moles of H_2 How many grams of NH_3 can be produced?

chemistry

how many moles of sodium ions are present in 3.50 L of 0.400 M Na3PO4?

chemistry

what is the structure of histidine, arginine, tryptophan, proline and tyrosine at pH 4?

chemistry

how can AgCl(s) be dissolved completely? write an equation for the reaction

Chemistry

why is flame test for chemicals important? give me reasons

chemistry

what gas law did you use to answer my questions earlier?

chemistry

A gas measures 500 ml at a temperature of -23 C. Find its volume at 23 C.

chemistry

a little help please? Anyone? can someone explain to me the trend in radii of O2-, F-, Na+, and Mg+

Chemistry

What is the wavelength lambda of the photon that has been released in 2.05x10^-18?

Chemistry

Calculate the concentration of H3O+ that contains 5.5 x 10 ^-5 moles/L OH- at 25 degrees

11th grade Chemistry

How to draw a Lewis dot structure....

11th grade Chemistry

How to draw a Lewis dot structure....

Chemistry

What is the pressure of the gas if 0.145 mol occupies 227 mL at 35°C?

Chemistry

how much chloride ions does 10.00 mL of .500M BaCl2 have?

Chemistry

how do arrangement of particles changes during a phase change

Chemistry

Calculate the approximate concentration of 41 mL of 6 M diluted to about 0.95 L of water?

chemistry

0.058 moles of NH3 weighs how much grams?

chemistry

what difficulty must be overcome when mixing water and margarine? why?

chemistry

Can you make a compound and show the electrons for magnesium and sulfur

Chemistry

If 10.0g of Pb at 25.0oC absorbs 1.00kJ of heat, what is it's final temperature?

Chemistry

Discuss the formation of the nickel ion with a 2+ oxidation number.

AP Chemistry

What is the Dumas Method in regards to the molas mass of a gas?

chemistry

How do u solve this calculate the mass of (NH4)2SO4 if 16 g H is used

Chemistry

What is the molarity of 350 mL of solution that contains 27 grams of CaCl2?

chemistry

Could we use HCl instead in HNO3 in Volhard method?

chemistry

balance equation CA(HCO3)2(aq) = CaCO3(s) + H2O(l) =CO2(g)

chemistry

What are the chemical aroma names for basil, nutmeg and bayleves

chemistry

What is the de Broglie wavelength of an oxygen molecule, O2, traveling at 503 m/s?

chemistry

What is the temperature of 0.65 mol of gas at a pressure of 1.1 atm and a volume of 11.2 L?

Chemistry

What is delta H for NaOH(s)+1/4O2(g) yielding 1/2Na2O2(s)+1/2H2O(l) ?

Chemistry Gd 11

If 150g of C8H18 is combusted what mass of water will be produced???

COLLEGE CHEMISTRY

Calculate the pH of a 0.052 NH4Cl aqueous solution

chemistry

which of the following is not paramagnetic? a)Co3+ b)Se2- c)Gd (element 64) d)Ni e)Gd3+

Chemistry

How many atoms of carbon are found in 5.94 grams of acetic acid?

Chemistry 104

How many moles of solute are present in 155 mL of 0.30 M NaNO3?

Chemistry

How is the chemical bonding in Na3PO4 both covalent and ionic?

Chemistry

Would the molecular ratio of the equation 4Na + O2 = 2Na2O be 4:2?

AP Chemistry

What is the equation for the standard enthalpy of formation for magnesium nitrate?

chemistry

What is the volume of 1.40 moles of nitrogen gas at 20.0°C and 770. torr?

chemistry

The quantum numbers: n = 1, l = 0 and ml = 0 ; can occur together to specify an orbital

chemistry

For all deexcitations that result in the visible spectrum of hydrogen, what is n ?

chemistry

How many grams equal 1.0 mol of Azurite, Cu3(CO3)2(OH)2?

Chemistry

Explain, in terms of subatomic particles, the difference between S-32 and S-34

chemistry

How many grams of rust form when 453 kJ of energy are released?

chemistry

what are the names of the following compounds: BF3 N2O4 P4S7?

Chemistry

how would you balance Al2(CO3)3--> A;2O3+CO2

Chemistry

What volume of O2 at 912mmHg and 33 degrees C is required to synthesize 11.0 mol of NO?

chemistry

what state is sulfur dioxide in at 200 k Pa and -100 Celsius

Chemistry

Explain, in terms of subatomic particles, the difference between S-32 and S-34

chemistry

How many grams of solute are present in 205 mL of .340 M KBr?

Chemistry

Calculate the number of moles of solute in 18.33 mL of 0.1115 M K2Cr2O7(aq)

Chemistry

How many joules of energy are necessary to melt 46.0 grams of ice?

CHEMISTRY

What concentration of aqueous CaCl2 solution freezes at -10.2ºC?

Chemistry

Explain the important conditions when you crystallize a solid by crystallization.

chemistry

how can convert millilitter to gram for tetraiso propyl alcohol

Drbob222

Can you please help me with some questions I have on my Chemistry lab?

chemistry

What is the pH of a solution of vinegar, which is 5.00% (w/v) acetic acid (CH3COOH, Ka = 1.8 e-5).what is the % dissociation?

Chemistry

How many grams of Ni(OH)2 are produced from the reaction of 45.0mL of 1.75 M NaOH solution?

chemistry

equation of the reaction of hydrochloric acid and iron sulphide

Chemistry Help

Which of the following species are isoelectronic? Select all that apply. 1) S^2- 2) Be^2+ 3) Cl^- 4) K^+ 5) Ca^2+ 6) Se^2-

Chemistry

In each of the following pairs, choose the species with the larger radius. 1) S^4+ or S^2+ 2) S or S^2-

Chemistry

Which of the following species are isoelectronic? Select all that apply. 1) S^2- 2) Be^2+ 3) Cl^- 4) K^+ 5) Ca^2+ 6) Se^2-

Chemistry

In each of the following pairs, choose the species with the larger radius. 1) S^4+ or S^2+ 2) S or S^2-

Chemistry

The solubility of zinc oxalate is 7.9 x 10 ^-3 M at 18 degrees C. Calculate its Ksp.

Chemistry

how could you improve the product yeild if you had to redo the synthesis

chemistry

Why is the pH at the endpoint of the titration of a weak acid by NaOh greater than 7.0?

Chemistry

What is the maximum [Ba^2+] that can be maintained in 1.100 L of a 030 M solution of Na2SO4?

Chemistry

1. Which element forms bonds with a sea of mobile electrons? a) Ca b) C c) Ar d) He

Chemistry

1. Which element forms bonds with a sea of mobile electrons? a) Ca b) C c) Ar d) He

chemistry

Calculate the mass of 2.56*10^24 formula units of aluminum dichromate.

chemistry

apply quantum theory to explain the photoelectric effect

chemistry

How many of grams of aluminum would be produced from the decomposition of 21.0 g of Al2O3

Chemistry

How many unpaired electrons are in the electron structure of 24 Cr, [Ar]4s1 3d5

Chemistry

What is the ionization energy (in kJ/mole) of the hydrogen-like ion F8+ ?

chemistry

What is the formula for the compound formed when potassium reacts with nitrogen?

college chemistry

How many grams of Mg(OH)2 can be prepared from the reaction of 20.0g of Mg3N2 with 10.0g of H2O?

college chemistry

what is the highest freezing point of H2O, NaCl, and HF

chemistry

how many mL of 1M HC2H3O2 are required to neutralize a spill of 25mL of 6M NaOH?

chemistry

What is the density of CO2 gas at -25.2 degrees celsius and 98.0kPa?

Chemistry

Calculate the energy of a photon of light with a wavelength of 360 nm?

Chemistry

What is the theoretical yield of PI3 from the reaction of 27.0 g of P and 68.0 g I2? 2P(s)+3I2(s) 2PI3(s)

chemistry

if you have 52 grams of hydrogen chloride in 6 liters of solution , what's the ph ?

chemistry

How many grams of AgNo3 are required to make 25 mL of a .80M solution?

chemistry

A saturated solution of PbSO4 has [Pb^2+] = 1.35E-4M. What is the concentration of SO4^2-? thanks

Chemistry

How many molecules of water are produced if 2.00 g of ammonia and 4.00 g 02 are reacted together?

Chemistry

What element has the final electron configuration as 3s2 3p4?

chemistry

give the name and formulas of the compounds that rust is composed of

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