Chemistry Answers

What is the rate of reaction when [N2O5]=0.0250[N2O5]=0.0250 ?

Express the rate in molarity per second to three significant figures.

The rate constant for a certain reaction is k= 8.60×10⁻³s^−1. If the initial reactant concentration was 0.600 M, what will the concentration be after 17.0 minutes?

You mix 50.0 mL of 0.165 M AgNO₃ with 25.0 mL of 0.302 M Ca(NO₃)₂. What is the concentration (M) of the NO₃^- anion in this solution mixture?

Write a detail note on Born-Oppenheimer Approximation

write a short note on importance of amino acid .

If 3.00 moles of H2O are produced, hoe many of moles of oxygen must be consumed?

Using the "equipartion" of energy concept, estimate the ideal gas $c_p$ (not $c_v$) in units of $k_B$ for "low-temperature" where no vibrational modes are activated. (if you calculate $c_p = 42k_B$, enter 42 as your answer)

A 4.626 g sample of a hydrocarbon, upon combustion in a combustion analysis apparatus, yielded 6.484 g of carbon dioxide. Calculate the mass percent of carbon in the hydrocarbon.

Give specific examples of solutions in each of the following states:

(a) gas in gas, (b) gas in liquid, (c) liquid in liquid, (d)solid in liquid, (e)

solid in solid. For each example, identify the solute and solvent

A solution of table sugar in water contains 5.25% by mass sucrose. Calculate:

1) the mass of sucrose in 225 g of solution

2) the amount of solution needed to obtain 70.0 g of sucrose

3)the mass of water contained in 450 g of the solution

4)the mole fraction of sucrose and water in 5.25% by mass sucrose.