hcbiochem

Before the first endpoint only K3PO4 is reacting. PO4^3– (aq) + H3O+ (aq) ---> HPO4^2– (aq) + H2O (l)?

For each of the following strong base solutions, determine [OH−],[H3O+], pH, and pOH.?

Is the dipole moment of CHCl3=0 or not? If not then what is its value?

Which addition to the map would be best?

1-if the bond is large is it easier to break or harder 2-what does bond dissocation mean?

Which has more dipole moment? 1) Cyclopropane 2) Cyclopropene And why?

the rate constant of a reaction is 1.5*10^7 s^-1 at 100°C calculate the activation energy for the reaction?

Please Help?

Kinda at a lost with this chemistry, Can someone please help me? (Picture below)?

Chemistry question:?

Calculate ?H for the following reaction of nitrous oxide with oxygen.?

Ammonia (NH3) can be synthesized from nitrogen gas (N2) and hydrogen gas (H2) by the following reaction. N2(g) + 3 H2(g) → 2 NH3(g)?

The total pressure exerted by a mixture of hydrogen, oxygen, and nitrogen gases is 2.1 atm.?

______ Has a Hf of zero?

What will be the pH of the solution?

Given the following data, can you solve for the ph of solution in titration?

what is the mass of magnesium which completely reacts with 250cm^3 of 1 mol/dm^3 sulfuric acid?

oxidation state of I in HIO?

Chemistry, Titration quesiton + Equilibrium?

Chem101 Heat Transfer?

How can we tell berylliumhas the same oxidation number in all of its known compounds?

Chemistry Question Easy?

Which of the following cannot be the formula of an alkene?

If 465mL of oxygen at STP is used in the reaction, what volume of CO2, measured at 37.3 degrees Celsius and 0.973atm, is produced?

Hydrogen with ununsetium?

Freezing of water at 273K (1atm) and boiling of water at 373K (1atm) - Are they spontaneous processes? If yes, then why? Cuz their S>0? How?

What is the mass formula for vanadium? Please help me?

why the chemical structure of a carboxyl group causes it to act as an acid (release H+ into solution).?

A company wants 700 sq ft of carpet,the carpet store sells only by square meter.How many sq meters does the company need to buy?1m = 39.37in?

What is the molar mass of manganese(II) nitrate tetrahydrate Mn(NO3)2·4H2O)?

Write the equiibrium expression for the equilibrium occuring when each of these solutes is added to water.?

Which of the underlined atoms (C1, C2, N, and O) are sp hybridized?

CHEMISTRY percent by mass of solute?

Chemistry questions. Please helppp.?

199.7 L of oxygen gas is initially at 1432 mmHg. If the pressure is changed to 5.22 atm, find the new volume of the gas in liters?

Neon gas originally has a temperature of 111.8°C. Then the gas is moved to an environment with a...?

Student has accidentally mixed up a bottle of ethanoic acid, hexane and hex-2-ene, how does pupil tells difference between the three bottles?

calculate [N2] and [O2] in water under a barometric pressure of 735 torr?

Find Van't Hoff factor for magnesium sulfate...?

Is it a polar molecule? http://i.imgur.com/882FRuf.jpg?

Calculate the molarity of a solution made by dissolving 0.740 grams of Na2SO4 in enough water to form exactly?

Calculate the molarity of a solution of acetic acid made by dissolving 28.00mL of glacial acetic acid at 25 ∘C?

At a certain temperature, the solubility of N2 gas in water at 2.04atm is 48.0mg of N2 gas/100 g water . Calcu?

Balance the following chemical equations?

What is the chemical equation of trilaurin to lauric acid?

Rank the molecules from highest to lowest boiling point?

Why PF3 doesnt obey octet rule?

Find volume of CH3 to burn water while Delta H combustion of CH3 -891KJ/Mol?

a sample of krypton had a volume of 10L at 1atm pressure and 273K. how many krypton moles were present?

Help me with this Back Titration problem?