chemistry! URGENT

59,905 results, page 45

Chemistry

What happens to an electron when a photon hits it?

Chemistry

what is the gram formula mass of Mg(C103)2? help!

chemistry

for a given reaction, the activation ener

chemistry

How much is the oxidation state of Cl2O3

Chemistry!!

How many moles of Mg are there in 4.00 L of a 0.500 M solution of MgCl2?

chemistry

what is the energy of a photon with the frequency of 3.5 x 10 delta 24 hz?

chemistry

reaction between Na2a2o3+licro4

chemistry

Convert 87 moles of CuBr2 to molecules?

Chemistry

How do you find the molar mass of HBr?

chemistry

Lewis diagram for NO3- and NH4+

chemistry

how many atoms of Na are there in every 2.5g of Na? please answer me! thank you!

chemistry

how many grams of drug are in 75mL of a 4% solution/

Chemistry

how many grams of oxygen are in 213.5g Fe2O3?

Chemistry

How much energy does 3.52 * 10^-7m of light have?

chemistry

If I was 100% water what would my volume be?

chemistry

which solution formed only by gases

Chemistry

Is NaHCO3 a polar aprotic solvent?

chemistry

how many moles are in 5 grams of no2 molecules?

chemistry

convert 4.37 moles of NaOH to grams.

chemistry

How do I calculate the molecules of 3.52 moles CO2?

chemistry

What is the difference between the representations Mg and Mg 2+? Please help!!!

chemistry

what is the lewis dot structure for CH3OH

CHEMISTRY

Complete these bronsted lowry reactions HS^- + H^+ ---> HS^- + OH^- ---->

chemistry

What is the name of the following compounds? A)CO B)HCI2O

chemistry

How many grams of NaOH are there in 2.5L of a 0.343M solution?

chemistry

what are the halogens at 25 degrees celcius and 1atm?

Chemistry

What is the empirical formula of caffeine (C8 H10 N4 O2)? How do I get it? Thanks

Chemistry

what is the pH of 0.316 M KC6H5O? what is the pH of 0.245 M CH3NH3I?

chemistry

calculate pH of 0.1M NH4^- of 100ml of that solution?

chemistry

calculate pH of 0.1M CH3COOH of 100ml of that solution?

chemistry

How many grams of NaOH are there in 2.5L of a 0.343M solution?

CHEMISTRY

Benzene equals 78.11 grams/mole

chemistry

What's the particle diagram of Carbon monoxide? Thank you

Chemistry

What is the purpose of baking a chemical pie?

chemistry

how many grams of oxygen are in 560g of ribose?

chemistry

Explain what a limiting agent is and how to identify it

Chemistry

Calculate the concentration of OH-(aq) in a solution which [H+] = 100 x [OH-]. Thank you.

chemistry

How many grams of NaOH are there in 2.5L of a 0.343 M solution?

Organic Chemistry

What is the substrate of the enzyme amylase?

chemistry

Calculate the pH in a 0.00500 solution of NaOH.

chemistry

What is the molar mass of one LA monomer?

Chemistry

what was the first sample in the ChemQuandry and where is it used

CHEMISTRY

How to determine the molarity of a 1.8% NaCl solution.

Chemistry

What is the balance equation for: (NH4)3 + MgCl2

chemistry

Mass of "KHP" to neutralize 18 mL of 0.20 M NaOH?

Chemistry

What unit is barometric pressure measured in?

chemistry

what is the pH of a 0.100 M solution of HA if 7% of the acid is dissociated?

Chemistry

the weak acid HQ has a pKa of 4.89. calculate the [OH-] of .85 M HQ.

chemistry

find the pK for the following ionization constants, K= 1.8*10^-5 and 1.1*10^.2

chemistry

What do you expect when you mix 1M Na2SO4 with 1M CaCl2?

Chemistry

which of the following has the largest radius A. CI- B. S2- C. K+ D. Ar E. Ca2+

chemistry

What is the hybridization of trioxo nitrate v ions ?

Chemistry

What is the percentage of potassium chloride to oxygen?

Chemistry

What is the percentage of potassium chloride to oxygen?

chemistry

number of moles of Cl in 2.7 mol CaCl2

Chemistry

How many moles of acetic acid are there in 25 mL container?

chemistry

How many grams of NaOH are there in 2.5L of a 0.343M solution?

chemistry

What reagent converts sodiumethanoate to methane?

chemistry

What reagent converts sodiumethanoate to methane?

chemistry

What are the concentrations of H3O+ and OH- and what is the pH of a 0.15 M solution of Na2CO3 (at 25 °C).

chemistry

3 molecule of water contains how many grams?

chemistry

find the concentration of HCL if the pH of the solution is 0.50

chemistry

How many mol of Oxygen are in 45.9 grams of CO2?

chemistry

What are the main contaminants likely to be in your soap?

Chemistry

What is the composition of 0.1M sodium acetate buffer,pH 5.00?

chemistry

Can I get a poem on acids,bases and salts?

chemistry

how many ml of 6m hcl aq are required to react with .10g of mg?

chemistry

what is the mass of a single oxygen autom

chemistry

is air heavier than carbon dioxide

chemistry

there are __ reprensentative particles in a mole of any substance

chemistry

what is the molarity of the Cl- ions at the stoichiometric point

Chemistry

What quantity of HNO3 can be neutralized by 0.1L of 0.50 m NaOH

Chemistry

What quantity of HNO3 can be neutralized by 0.1L of 0.50 m NaOH

chemistry

what is activation energy for combustion of sawdust

Chemistry

How many moles of N2 can be in a balloon with a volume of 6.00 L at STP?

chemistry

How many grams of Na2CO3 are required to Na2S2O3

chemistry

How many grams of Na2CO3 are required to Na2S2O3

CHEMISTRY

WHAT MASS OF WATER CAN BE PRODUCED FROM 30.0G OF AMMONIA

Chemistry

Which of the following substances will oxidize Sn(s) to Sn^2+? a) Cu(s) b) Cl2(g) c)Cl-(g) d) Mg(s) e) Cu^2+(aq) f) Mg^2+(aq)

chemistry

how many atoms are in 0.320 moles of aluminum?

chemistry

how many moles of N2 (g) re present in 1.00 of N2 (g) at 100 c and 1 atm?

Chemistry

how do you find PH of 0.010 M HNO3 solution?

chemistry

write the products of these combination reactions: K + O2 ---> Ca + S ---> F2 + Al --->

Chemistry

What's the molar mass of AuCl3 x 2H20?

Chemistry

Why do tomatoes grow better in a greenhouse?

Organic Chemistry III

What is a Chaser Solvent?

Chemistry

How many mL of Water are made from 4 moles of HNO3?

CHEMISTRY

What atomic orbital has the quantum numbers n = 3, l = 1, ml = -1?

chemistry

What are the quantum numbers for a 3d atomic orbital?

Chemistry

What is the solubility of Ca(OH)2 at a pH of 4.802 Ksp of Ca(OH)2 = 6.500*10-6

CHEMISTRY

What is the meaning of negative couplage in NMR

chemistry

How many moles of chloroethylene contain 5.47×10^26 molecules?

Chemistry

How do you figure out hydrate formulas?

chemistry

Give the ph value to get anatase tio2

Chemistry

What do you think cause H2O2 to decompose rapidly

Chemistry

What do you think cause H2O2 to decompose rapidly

chemistry

How many grams of O2 are required to burn 13.0g of acetylene?

chemistry

how many grams of aluminum are in 25.0 ml of a 14%(w/v) solution of Al2O3?

chemistry

how does an ionic solute dissolve in water?

Chemistry

How many moles of SiO2 will contain 48 g of oxygen?

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