hcbiochem

What is the daughter nuclide when Bi-214 experiences beta decay? Please explain ?

How would I Find the energy in joules that would that would be required to raise the temperature of 20 g of ice at -20°C to steam at 120°C? ?

Answer chemistry homework ?

Answer chemistry homework ?

Determine whether each molecule given below is polar or nonpolar.?

Predict whether or not each of the following molecules or ions should exist in a relatively stable form.?

How do you make fuel out of water?  ?

A 47.70 g sample of a substance is initially at 20.7 °C. After absorbing 1271 J of heat, the temperature of the substance is 119.1 °C?

A sample of gas in a balloon has an initial temperature of 30. ∘C and a volume of 1.62×103 L If the temperature changes to 65 ∘C ?

If you combine 410.0 mL of water at 25.00 ∘C and 120.0 mL of water at 95.00 ∘C, what is the final temperature of the mixture? ?

Does anyone know the answer to this chemistry problem?

A slightly soluble salt has the formula A3B5 and a Ksp of 3.3E-26. What is pB in a solution of this salt?

How would I go about solving for POH with the given information?

Chem help?!?

What is molarity and molality?

When a group 1 element reacts it?

A chemical reaction that is first order in X is observed to have a rate constant of 2.1 × 10 –2s –1. ?

If 36.9 mg of lidocaine HCl contains equivalent of 30 mg lidocaine base (MW = 234 g/mol). What is the molecular weight of the lidocaine HCl?

How many grams of hydrocortisone acetate (MW = 405 g/mol) should be used to prepare a 65 g tube of ointment containing......?

Biochem/ free energy question?

A sample of mercury with a mass of 114.0g was combined with 17.9g of oxygen gas, and the resulting reaction gave 123.1g of mercury(II)oxide.?

determine how many grams of CO2 are produced by burning 2.43g of C4H10?

Help with chemistry questions ?

What is the pH of acid rain?

Can someone please draw the grave ?

Biology problem help?

chem help?

Calculating pH of buffers?

The standard-state reduction potential?

How may pi-bonds are there in Ammonium molecule?

g12 chem HBr and NH3 pH at equivalence?

Hydrogen gas (H2) reacts with nitrogen gas (N2) to produce ammonia (NH3)...?

At the equivalence point of a titration of acid-base reactions, the pH?

How do you find the simplest ratio between the numbers of moles of NaHCO3 and CO2?

Electrochemistry Question?

Chemistry Help - Kinetics (Half-life)?

Biochem/ pKa/ buffer question?

Calculate the PH ?

Which substance in each of the following pairs would you expect to have larger dispersion forces?

reaction quotient and equilibrium?

Using specific heat capacity to find temperature change?

Counting sigma and pi bonds in a small molecule?

oxidizing agent and the reducing agent on the reactant side?

When a solid dissolves in water, heat may be evolved or absorbed. ?

Neohetramine, C16H21ON4 (285.37 g/mol) is a common antihistamine. A 0.1247 g sample containing this compound was analyzed by Kjeldahl method?

Chemistry ?

Chemistry Help?

what is the full electron configuration of lead?

which equation does not represent a neutralisation reaction?

Oxidation questions?