chemistry! URGENT

60,412 results, page 51

chemistry

what is the molality of 18 g NaCl in 200 g of H2O?

CHEMISTRY

What is the pH of a solution with [H3O+] = 1 x 10-9 M? My answer is pH=9. is that correct

chemistry

what wil be the molarity if it increases from 20 c to 100 c?

chemistry

grams of potassium permanganate are in 2.58 moles i don't get it ? help

chemistry

Can somebody please answer my question.

chemistry

Calculate the number of moles in 74.1 g Pb(C2H3O2)2.

chemistry

a radioisotope is called a tracer when it is used to

Chemistry

What are some cons of becoming a pharmacologist?

Chemistry

What is the address of the 11 th electron of magnesium? And how do you determine this?

chemistry

How to prepare 250.0 mL of 0.076M NaOH?

Chemistry

Outline the prepartion of 2-chlorobutane from an alcohol?

chemistry

An equilibrium is dynamic. true or false

chemistry

2) At 298K, what are the molarities of pure water?

Chemistry

What is the enthalpy change when 25 g's of PCl5 are decomposed /\ H= 90

Chemistry

calculate the density of NH3 at S650mm of Hg

chemistry

How many grams of carbon are in 2.42 moles of C2H6

Chemistry Help

WHAT???? which of these are electrolytes?? CH3CH2OCH2OH PCl3 Na2CO3 O2

Chemistry

Calculate the pOH of a 0.410 M Ba(OH) solution.

chemistry

How many kilocalories are required to produce 12.7g of aluminum?

Chemistry

Find the Density of xenon of STP

chemistry

why gasoline wouldn't dissolve in water ?

Chemistry

Calculate the mass of 5.35 mol of iodine

chemistry

what's the lewis dot diagram for methanol?

chemistry

How to prepare 14M Sulfuric acid

Chemistry

How many oxygen atoms are in 6Al (SO4)3

Chemistry

How many mL of HCl solution are required to change pH from 2.67 to 9.25?

chemistry

7.5 gm of chromium and 7.5 grams oxygen yield

chemistry

who created the mcilvaine buffer system?

Chemistry

Why can't milk of magnesia (Mg(OH)2), act as a buffer?

chemistry

calculate the density of NH3 gas at s.t.p.

chemistry

d(g)--->3/2 e(g)+5/2 f(g) when e increases by .25 mol/l*s how fast is f increasing

Chemistry

How does a pH of a buffer solution go outside of its range?

chemistry

What is the oxidation number of chlorine in Al(ClO4)3?

chemistry

estimate the boiling point of Pcl3

chemistry help

calculate the PH of a buffered solution of HF and F (Pka of HF is 3.2)

chemistry

How do you separate oxygen and methane gases?

chemistry

A|A+3(0.1)||B+2(0.01m)|B GIVEN E°A|A+3=0.75v E°B|B+2=0.45v

chemistry

What mass of copper will be deposited by a current of 7.89?

chemistry

how many significant figures are in the measurement 0.002 ml? 2??

Chemistry

What is the mass of a 4 kg object, A. On the earth (g=-10 m/s/s) B. On the moon (g=-2 m/s/s)

Chemistry

What intermolecular forces are present in CSH2??

chemistry

The molar volume of an ideal gas is

CHEMISTRY HELP

how many hao's exhibited by S16? my answer is 4?

Chemistry

What are some errors that can be made in colorimetry?

chemistry

HCOOH + CaCO3 will give what (what are the products)

Chemistry

If there are 5,280 ft=1.00 mile ,how many miles are in 50,000 ft?

Chemistry

I want to make 10 ml solution of 80% NaOH and 20% KOH

chemistry

What is the mass of 0.0137 mol of aspirin?

general chemistry

How many oxygen atoms are in 3.90 g of quartz?

Chemistry

0.00267m= how many nm? please show me how to set this up. thanks!

Chemistry

How many kJ is released when 3.4 mol of water is frozen?

chemistry

would NBr3O be polar or nonpolar?

Chemistry

average atomic mass of isotopes

Chemistry

8.00 times10*19 molecules H2O to grams

Chemistry

How many atoms are in 448 grams of carbon?

Chemistry

What is the mass in grams of Br in 8.53 moles of FeBr5?

chemistry

find the# of molecules in 5.3 moles of h20

chemistry

give products of HgCl2 + KSO4

chemistry

calculate the molar concentration of 0.1 " AgNO3

chemistry

How many moles of platinum would be in 10.0 g of this metal?

chemistry

Name a lustrous non metal?

chemistry

Can a substance,that cannot be electrolysed,conduct electricity?Why?

chemistry

what is the pH of .001M solution of acid (pKa=3)

Chemistry

How many grams of drug X are in 10 mL of a 1:200 solution of X?

Chemistry

Why is it important to not let the wooden split burn ?

chemistry

At what ph will Al(OH)3 begin to precipitate from a .10 M solution of AlCl3?

Chemistry

What is the bond enthalpy of N2(g)+2H2(g) --> N2H4(g)?

Chemistry

How many oxygen atoms are there in 0.018 mg of H2O?

Chemistry

What is the mass of an atom's nucleus called?

chemistry

How many kilojoules are absorbed when 318 g of Ca(OH)2 reacts?

chemistry

name three characteristics of nonmetals

chemistry

What is the pH of a 0.5 M solution of NaHCO3? Kb = 2.4x10-8 (base)

chemistry

calculate the pH of 5M aqueous ammonia. Given kb=1.8 x 10^-5

Chemistry

What is the chemical formula for coconut oil?

Chemistry

What is the Lewis structure for salicylic acid ?

chemistry

how many molecules are present in a 750 ml of C6H12O6

chemistry

How to solve this problem in counting atoms 2 pb(CN)2

Chemistry

Would copper (II) phosphate be nonpolar?

Chemistry

Explain the trends in the solubility of water.

Chemistry

How can i synthensize 1g of salicylic acid from benzene

Chemistry

How can i synthensize 1g of salicylic acid from Phenol

Chemistry

What is the ionic strength of 0.2 M Na2HPO4 in a solution?

chemistry

why we not use HNO3 and HCl in iodometry

Chemistry

How do you find the formula for nitric acid?

Chemistry

What does potassium nitrate form when it decomposes

Chemistry

How many molecular does 36.0 grams of water represent?

Chemistry

if i added (0.1N) 4.6 ml of NaOH to 10 ml of Ch3cooh calculate the ph

Chemistry

Calculate the mass of Mg needed to produce ~40 mL of H2. how do I do this?

Chemistry

Why is radius of Fe2+ less than that of Mn2+ ?

Chemistry

What happens to the pH of an acidic solution when it is heated

Chemistry

Complete the reaction- 2F2(g)+2H2O(l)=?

chemistry

what is the mass of an empty 75 mm test tube?

Chemistry

What is the density of NH3 at 800torr and 25 Celsius?

chemistry

how many chloride ions are in o.35 mol MgCl2?

chemistry

___Fe(NO3)2 + Al___Al(NO) +__Fe

Chemistry

what is the oxidation number of Chlorine in KCIO4???

Chemistry

Highest ionization energy to lowest I be ci f

Chemistry

Highest ionization energy to lowest I be ci f

chemistry

calculate the pH of a 0.100M NH4Cl solution.

Chemistry

Calculate the empirical formula of Tylenol: C, 63.56%; H, 6.00%; N, 9.27%; O, 21.17%

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