Questions LLC
Login
or
Sign Up
Ask a New Question
lyne
Questions and answers by visitors named
lyne
Questions (127)
Calculate the hydrogen ion concentration and the pH of each of the following solutions of strong acids.
(a) 0.00010 M HCl if you
4 answers
1,285 views
What is the pH ( 3 significant digits) of a 0.01 M solution of sulfuric acid? Hint is that the first ionization constant is
1 answer
365 views
Posted by lyne on Tuesday, March 25, 2008 at 11:44pm.
What is the pH ( 3 significant digits) of a 0.01 M solution of sulfuric
1 answer
452 views
What is the pH ( 3 significant digits) of a 0.01 M solution of sulfuric acid? Hint is that the first ionization constant is
1 answer
383 views
What is the pH ( 3 significant digits) of a 0.01 M solution of sulfuric acid? Hint is that the first ionization constant is
1 answer
453 views
k2=[H][SO4]/[HSO4]
.012=(.01+x)(x)/(.01-x) Solve for x, and calculate pH where H is .01+x When I am solving for x does it become
1 answer
404 views
Next step, multiply both sides by (.01-x)
.012(.01-x)=.01x+x^2 gather terms, put in standard binomial form, use the quadratic
3 answers
490 views
Next step, multiply both sides by (.01-x)
.012(.01-x)=.01x+x^2 is the binomial x^2 + .002x-1.2x10^-4 what is the next step is the
3 answers
361 views
DrBob has given you the equation to use:
k2 = [H^+][SO4^-]/[HSO4^-] and the values to substitute [H^+] = 0.01 + x [SO4^-2] = x
4 answers
458 views
what is the name for CsF?
i had cesium flouride but it's wrong... help?
5 answers
508 views
solve for the variable
�ã(square root) �ãy+6 - �ãy = �ã2 would i square both sides first? im stuck
4 answers
430 views
if you have 55.6 grams of nitrate ions in a compound that consists of nitrate ions and plumbous ions, how many grams of the
3 answers
441 views
if you have 55.6 grams of nitrate ions in a compound that consists of nitrate ions and plumbous ions, how many grams of the
4 answers
417 views
calcium hydroxide reacts in a neutralization reaction with sulfuric acid in a 1:1 ratio to form water and calcium sulfate. if
3 answers
1,030 views
how do i balance the following(fill in the blanks):
1.) __BF3 + __Li2SO3 --> __B2(SO3)3 + __LiF 2.) __CaCO3 + __H3PO4 -->
9 answers
2,072 views
A 46.2 gram sample of copper is heated to 95.4 degrees celcius and then place into a calorimeter containing 75.0 grams of water
5 answers
3,953 views
a certain substance strongly absorbs infrared light having a wavelength of 3.75µm. what is the frequency of this light in
7 answers
820 views
A compound containing only sulfur and nitrogen is 69.6% S by mass; the molar mass is 184 g/mol. What are the empirical and
3 answers
3,910 views
which element has a more favorable (exothermic) electron affinity?
K Mg how do i determine this?
2 answers
1,281 views
The element rhenium (Re) has two naturally occurring isotopes, 185Re and 187Re, with an average atomic mass of 186.207 amu.
7 answers
8,751 views
The compound adrenaline contains 56.79% C, 6.56% H, 28.37% O, and 8.28% N by mass. What is the empirical formula for adrenaline?
5 answers
1,077 views
Calculate the number of C, H, and O atoms in 4.50 g of glucose (C6H12O6), a sugar.
help please?
2 answers
503 views
Calculate the number of C, H, and O atoms in 4.50 g of glucose (C6H12O6), a sugar.
okay i did it and i got just the C right and
7 answers
2,500 views
Dr Bob please answer below
1 answer
325 views
What mass of iron contains the same number of atoms as 70.05 g of nitrogen?
7 answers
669 views
The first character of a(n)__ must be a letter or an undeerscore(_).
a.class b.identifier c.module d.program please explain
1 answer
422 views
what would the the answer to 55%7 be?
1 answer
283 views
what are three chemical characteristics and ten physical characteristics
so far for physical i have -color -taste -smell -size
3 answers
470 views
how many protons, nnutrons, atomic mass, mass number, and charge to each of the following have?
sodium atom fluorine ion stannic
6 answers
668 views
need help on chemistry below
1 answer
346 views
okay and i don't understand what they are asking for for chemical characteristics.
i was thinking like density, melting point,
1 answer
460 views
continued from before....
the question was what are three chemical characteristics and ten physical characteristics so then would
4 answers
612 views
how many mL in .00670 grams of a substance that has a density of 1.96 g/cm3.
do you do 1.96g/cm3 divided by .00670 grams to solve
1 answer
445 views
are these correct when solving for proper significant figures
2.33 + 4.0045=6.33 .000456 + 1.0023=1.0027 2.33/4.0045=.582
2 answers
489 views
arent the allotropes of carbon
diamond buckminsterfullerene(or whatever its called haha) and graphite?
3 answers
554 views
sorry for all the questions i have an exam tomoro!
but what is intrinsic or intensive are they the same?
1 answer
419 views
The term Intrinsic denotes a characteristic or property of some thing or action which is essential and specific to that thing or
3 answers
597 views
1/2|6y-9| +5 is < or = 2
i solved it and got two fractions but the answer is 0 can anyone explain? btw this is absolute value
4 answers
421 views
What does it mean to say that the ions of an electrolyte behave independently of one another when the electrolyte is dissolved
2 answers
636 views
predict the identity of the precipitate that forms.
calcium nitrate, Ca(NO3)2, and sodium chloride , NaCl why does the answer
4 answers
1,596 views
NaCl + CuSO4
to write the product would i just do double replacement to get Na2SO4 + CuCl2 so the whole thing would be 2NaCl +
6 answers
634 views
Ca(s) + Br2(l) --> CaBr2 is synthesis
my teacher also said that the cause of the reaction is stable electron configuration is
4 answers
3,737 views
i did a lab and found that of the products two gases were formed
H2 and H2CO3 the question is... What are the tests that will
3 answers
422 views
3BaCl + 2Na3PO4 --> Ba3(Po4)2 +^NaCl
is Ba3(PO4)2 the ppt. because Cl salts are soluble so it will dissolve?
3 answers
687 views
Ca + Br2 --> CaBr2
its synthesis and the reason the reaction happens is stable electron configuration but i don't understand why.
3 answers
568 views
is there any way to tell if a teacher is currently 'on' and answering other question
4 answers
376 views
Ca + Br2 --> CaBr2
its synthesis and the reason the reaction happens is stable electron configuration but i don't understand why.
5 answers
1,828 views
How many grams of oxygen are required to react with 2.50 g of propane (C3H8) to form CARBON MONOXIDE and water?
this is what i
4 answers
2,126 views
can anyone tell me if natalie is on
1 answer
371 views
Nitrogen (N2) and hydrogen (H2) react to form ammonia (NH3). Consider a mixture of six nitrogen molecules and six hydrogen
6 answers
12,088 views
is dr bob on
3 answers
299 views
Aspirin (C9H8O4) is synthesized by reacting salicylic acid (C7H6O3) with acetic anhydride (C4H6O3). The balanced equation is
6 answers
1,507 views
When ammonia gas is burned in oxygen the products formed are water and nitrogen monoxide gas. Write the balanced equation
3 answers
784 views
im having trouble balancing this. I tried it but everything just ends up being uneven
Ba(OH)2 * 8H2O + NH4SCN --> Ba(SCN)2 + H2O
3 answers
407 views
a.Write the balanced chemical equation for the reaction of methane and sulfur. (Type your answer using the format CO2 for CO2.
7 answers
2,526 views
#2) Consider the preciditation reaction of a solution containing 3.50 grams of sodium phosphate mixed with a solution containing
2 answers
1,002 views
Hydrogen cyanide is produced industrially from the reaction of gaseous ammonia, oxygen, and methane.
2 NH3(g) + 3 O2(g) + 2
4 answers
3,779 views
what is the function rule for this figure
sides- 3 4 5 6 7 diagonals- 0 2 5 9 15
1 answer
385 views
Chlorine dioxide, ClO2, has been used as a disinfectant in air conditioning systems. It reacts with water according to the
5 answers
2,137 views
function rule for tis
points- 1 2 3 4 lines- 0 1 3 6 its similar to an earlir one i posted but i still don't quite understand
4 answers
463 views
Consider the following unbalanced reaction.
P4(s) + 6F2(g) 4PF3(g) How many grams of F2 are needed to produce 114. g of PF3 if
3 answers
2,115 views
A student prepared aspirin (C9H8O4) in a laboratory experiment using the following reaction.
C7H6O3 + C4H6O3 C9H8O4 + HC2H3O2 The
4 answers
2,801 views
Solutions that have large amounts of solute are___
solutions that have small amounts of solute are ___
2 answers
525 views
we did a lab where we mixed an iron nail with cupric chloride to find the reaction
is this the balanced equation... Fe + CuCl2
3 answers
694 views
is cm^3 and cc and mL all the same??
1 answer
246 views
we have to make an instrctinal packet showin relationships between moles and concentration.
i cant find the following 1)how is
7 answers
536 views
how do you prepare a solution using the proper lab equipment(both from dry solid and a stock solution)
i researched it but all i
4 answers
736 views
How much water should be added to 55.0 mL of 0.201 M HCl to dilute the solution to 0.155 M?
i used M1V1 = M2V2 and i got 71.3mL
3 answers
449 views
How would you prepare 250.0 ml of a 0.6 M aluminum sulfate solution
2 answers
995 views
What is the molarity of a solution when 3L of a 4M solution is mixed with 3L of a 6M solution?
3 answers
412 views
How much of each starting material would you use to prepare 2.00 L of each of the following solutions?
0.240 M NaOH from 1.00 M
4 answers
1,864 views
How much water should be added to 45.0 mL of 0.225 M HCl to dilute the solution to 0.155 M?
i did .225M x .045L / .155M = 65mL so
1 answer
430 views
If the volume of solute is 6 ml and the volume of the solution is 300 ml, what is the solute's percent by volume?
is it
2 answers
1,055 views
What volume of .101 M HNO3 is required to neutralize each of the following solutions?
there are four and i got them all right but
4 answers
1,611 views
Calculate the sodium ion concentration when 80.0 mL of 4.5 M sodium carbonate is added to 30.0 mL of 1.0 M sodium bicarbonate.
ho
3 answers
605 views
how many moles of hydroxide ions are there in 82.35 mL of a 2.164M Sr(OH)2 solution?
i understand how to do the math for problems
2 answers
788 views
what are the different types of solutions??
is it saturated nonsaturated and supersaturated?
1 answer
329 views
for my test i have to be able to
Be able to determine the final molarity of a mixture of two solutions my teacher said the
3 answers
388 views
does normality measure concentration of solutions??
1 answer
310 views
Write a chemical equation showing how each of the following species behaves as a base when dissolved in water
a.) O2- i have O2-
3 answers
1,472 views
help below please
1 answer
253 views
Calculate the hydrogen ion concentration, in moles per liter, for solutions with each of the following pH values.
pH=1.10 im
5 answers
2,131 views
NH3 + HCl -->
can someone please finish that?? is it 2H2 + N2 + Cl or something? if so how would i balance it?
1 answer
396 views
Most window cleaners are aqueous solutions of ammonia. A 9.00 mL sample of a particular window cleaner requires 42.95 mL of
4 answers
703 views
The total acidity in water samples can be determined by neutralization with standard sodium hydroxide solution. What is the
4 answers
1,863 views
how did geologists determine the divisions of the geologic time scale?
2 answers
642 views
what does the geologic time scale indicate about the change in life-forms over time?
4 answers
744 views
what's one good and bad effect of Prohibition?
4 answers
407 views
Give two reasons for the new interest in leisure activities in the 1920s.
i already know one: rising wages and labor-saving
3 answers
494 views
Define variables and write a system of equations for each situation. Solve using substitution.
Suppose you are thinking about
5 answers
1,458 views
okay we are drawing bonds and i was wondering how i am supposed to know if you can make a double or triple bond
for example for
7 answers
566 views
Why are all diatomic molecules diatomic molecules linear, regardless of the number of valence electron pairs on the atom?
i don't
2 answers
911 views
hpw would i draw a lewis structure for a molecule with 3.5 bonds
for example NO2???
2 answers
573 views
when do you need to use the octet rule for lewis structures and when does it not apply
i am confused for N2O4 i cant get the
4 answers
805 views
what is the duet rule?
1 answer
382 views
How do multiple bonds introduce rigidity into molecules?
what is meant by rigidity??
4 answers
891 views
I have to draw the QMM of CL2C2. For the Lewis structure i think that the two C ayoms form a triple bond and the Cl atoms form
2 answers
575 views
why is COCl2 polar
a. different electronegativities b. nonsymmetric c. tetrahedral d. symmetric e. trigonal planar more than one
3 answers
1,529 views
help with below questions please and thank you
3 answers
347 views
I have to draw the QMM of CL2C2. For the Lewis structure i think that the two C atoms form a triple bond and the Cl atoms form
3 answers
733 views
Pages
1
2