Chemistry - December 2006

a) CaCl2(aq) is a product
b) When balanced the coefficient of HCl(aq) is 2
c) The molecular equation is the net ionic equation
d) OH-(aq) does not appear in the net ionic equation
e) Cl -(aq) does not appear in the net ionic equation

2006-12-04 13:59:23 · 1 answers · asked by Anonymous

For the reaction BaCl2 (aq) + ZnSO4 (aq), BaSO4 precipitates out.

Calculate the percent yield(%) if 15.956 g of BaSO4 precipitates when 1.750 L of 0.0600 M BaCl2 (aq) and 1.460 L of 0.0553 M ZnSO4 (aq) are mixed.

2006-12-04 13:57:41 · 4 answers · asked by Anonymous

2006-12-04 13:54:50 · 1 answers · asked by Thegoodlife9 1

Emission controls for automobiles focus on minimizing the amount of unburned volatile organic compounds (VOCs), NOx (primarily NO), and toxic carbon monoxide (CO). Explain why some air is injected into the exhaust gases before they are passed over a catalytic converter.

2006-12-04 13:52:58 · 4 answers · asked by Steven I 1

1. [1pt]

For the reaction BaI2 (aq) + MgSO4(aq) -->

which compound will precipitate?


Enter an answer in the form, for example, NaNO2 for NaNO2

2006-12-04 13:52:38 · 1 answers · asked by Thegoodlife9 1

2006-12-04 13:49:48 · 2 answers · asked by Varun S 1

Research and describe the most exciting anticancer drug currently making headlines in the popular press. Provide its chemical structure and proposed mode of action.

2006-12-04 13:45:28 · 1 answers · asked by koolbreeze 1

2006-12-04 13:38:05 · 3 answers · asked by Anonymous

we're doing a chemistry test and we need to know the answer for one of our problems

2006-12-04 13:35:13 · 4 answers · asked by Anonymous

10.50 g of gaseous HCl are dissolved in water to give a final solution of 25.6 mL .
What is the molarity of this solution ?

2006-12-04 13:31:50 · 4 answers · asked by nietzsche 1

ok, so..I'm trying to name the following ionic compounds: [All the numbers in these ionic compounds are subscripts]]

A.) NI3(PO4)2
B.) FeI2
C.) MnF3
D.) CrCI2
E.) NaCN

*****************************************************************
One example that we took in our notes is:

Write the name of CuO
* Needs the charge of Cu
* O is -2
* Copper must be +2
* Copper (II) Oxide
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Ok, so i sort of get it. I mean, with this example that I followed, I got this: CuS would be Copper (II) Sulfide. Can someone please explain how to do this a little more clearly? thnx

2006-12-04 13:30:48 · 2 answers · asked by Pearl 2

of ph 4.5 using nach3coo in 800 ml water find no og grams of nach3coo needed ka is 1.8*10^-5

2006-12-04 13:25:42 · 1 answers · asked by Anonymous

is lead and sulfur minerals

2006-12-04 13:22:58 · 7 answers · asked by Lee 1

im doing a research article on antibiotics and stuff for organic chem . . i chose an article in chemical and engineering news . . the date on the aritcle is april 12, 2004 and its called NEw approach to antibiotics i could really use the help as the paper is due tomorrow morning

2006-12-04 13:16:44 · 1 answers · asked by sailorc_ko2000 1

How would you slove/setup this problem? Calcium is normally present in plasma at a concentration of about .1g/l. Calculate the mEq/L of Ca2+ in the plasma. The atomic weight of ca is 40

2006-12-04 12:54:52 · 1 answers · asked by qutiepy9 2

'Mono' means one 'di' means two and 'poly' means many. why are these terms used in describing the three types of sugars/?

A change in the type of fatty acid results in a different type of a
fat molecule. What molecule remains unchanged in all fats?

List two ways that a fatty acid molecule differs from glycerol.




Please ANSWER these QUESTIONS!!!!!!!!!!!!!!!!!T T

2006-12-04 12:52:34 · 1 answers · asked by eun l 1

Can someone help set up this problem:

How many formula units are in 5.1 g of TiO2?

2006-12-04 12:50:19 · 1 answers · asked by Mia16 3

Please help me out and also put the formula if you know please..thank you

2006-12-04 12:47:54 · 4 answers · asked by Anonymous

solve this if you are good at chemistry!

2006-12-04 12:39:26 · 3 answers · asked by Anonymous

A sample of gas is collected by water displacement at 600.0 mm Hg and 30 C. What is the partial pressure of the gas?

Steps on how to do it will be really helpful...i am not so sure how to use the partial pressure formula.

2006-12-04 12:35:39 · 3 answers · asked by Anonymous

2006-12-04 12:29:51 · 3 answers · asked by John W 1

How can you make saturated powder deslove with out adding water?

2006-12-04 12:16:23 · 2 answers · asked by Anonymous

Can someone please help me set up this problem:

If you burned 6.10 *10^24 molecules of ethane (C2H6) what mass of ethane did you burn?

2006-12-04 12:05:47 · 2 answers · asked by Mia16 3

when 2.050 L of 0.0550 M BaCl2 (aq) and 2.020 L of 0.0429 M ZnSO4 (aq) are mixed.

2006-12-04 12:05:11 · 2 answers · asked by Amandy 1

it ends with an i and is 6 letters.

2006-12-04 11:50:04 · 9 answers · asked by Anonymous

Which one of the following is a covalent oxide?

Which one of the following is a covalent oxide?

a) BeO
b) MgO
c) K2O
d) Rb2O
e) CaO

2006-12-04 11:49:54 · 4 answers · asked by Erin C 1

Which of the following hydrides is the most ionic?

a) LiH
b) NaH
c) CH4
d) NH3
e) RbH

2006-12-04 11:49:13 · 1 answers · asked by Erin C 1

Write the balanced equation for the combustion of heptane and use the average bond energies to estimate the reaction energy (heat of combustion). Give your answer in kJ/mol of heptane . (Be sure to indicate the sign)

I keep getting -92, but that's not correct.

2006-12-04 11:48:40 · 1 answers · asked by Anonymous

Say you have:
CH3CH2CH2CH2OH + HBR=== CH3CH2CH2CH2BR + H20

Say your given quantities of 18.5 g of the first compound.

What is the molecular weight and the number of moles?

And how do you find the theorectical yield?

2006-12-04 11:43:32 · 1 answers · asked by Trevor M 1

Thanks for reading this...I think I know how, but need a little reinforcement.
1) How many molecules are contained in 6.53 mol of nitrogen gas N2?
2) A sample of oxygin gas O2, weighs 28.4 g. How many molecules of O2, and how may atoms of O are present in this sample?
Thank you

2006-12-04 11:42:33 · 4 answers · asked by Anonymous