Red Dragon

Also, if you might know the answers to any of the following questions, it would be a great help.

Thanks :)

1) A 1.00 g mineral sample containing carbonate was dissolved in 50.00 mL of 0.1000 M HCl according to the equation

CO32- + 2HCl --> CO2 + H2O + 2Cl-

The unreacted HCl was then titrated with 24.69 mL of 0.1000 M NaOH.

The %CO32- in the mineral sample is computed to be

2) For which of the below solutions are solute activities expected to deviate most signficantly from their concentrations?

0.01 M glucose, sucrose, MgS, or KCl

3) The ionic strength of a 0.10 M Ca(NO3)2 solution is computed to be...?

Thanks for your help :)

I know this sounds kinda gross but I really am curious as to how to cure someone of these pesky parasites. Thank you for your help...

I really need help with this:

Of all airline flight requests received by a certain discount ticket broker, 10% are for international travels and 90% are for domestic flights. Let X be the number of international flight requests of the next 20 customers. Assuming independence of successive requests, answer the following questions.

(1) What is the distribution of X? Give the name of the distribution and values of the parameters;

(2) List all the possible values of X;

(3) Compute the probability that P(X  5);

(4) Compute the mean and variance of X (using formulas).

(5) Interpret the mean you computed in (4).

(6) Compute the probability in (3) using Poisson approximation (ignore the condition np < 5 or nq < 5).

Please help me with these problems...Thanks...

2) What are the formula weights of: (a) NaCl (b) BaCl2

7) A substance was found by analysis to contain 45.57% tin and 54.43% chlorine. What is the empirical formula?

13) An analysis of an oxide of nitrogen with a molecular weight of 92.02 amu gave 69.57% oxygen and 30.43% nitrogen. What arethe empirical and molecular formulas for this nitrogen oxide? Complete and balance the equation for its formation from the nitrogen and oxygen.

14) How many potassium atoms are present in 0.01456 g of potassium?

4) How many grams of zinc chloride could be formed from the reaction of 4.96 g of zinc with excess HCl?

5) How many kilograms of of copper sulfide could be formed from the reaction of 0.90 mol of copper with excess sulfur?

6) If copper(I) sulfide is partially roasted in air (reaction with O2), copper(I) sulfide id first formed. Subsequently, upon heating, the copper sulfitge thermally decomposes to copper(I) oxide and sulfur dioxide. Write balanced equations for these two reactions.

Suppose someone came up to you and told you that he/she has this connection, telepathically, to a person and/or certain people. They say that they know that they are not crazy and these are not just voices in their head. And that they are connected for a reason. Would you believe him/her? What would you say to him/her?

Have you ever had a dream that was strange and so toatally a dream. Then one day you experience a case of dejevu where you are now living the dream?

How do you know what to say to a guy you like and yet you are not sure if he is trying to avoid you or what he is thinking? What am I to do?