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A water solution which contains magnesium chloride as the only solute measured 232 parts per million chloride on an analytical
2 answers
asked by
Patty
520 views
A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research
5 answers
asked by
help!
2,093 views
what is the pH of an aqueous solution that is 0.123M NH4Cl
5 answers
asked by
help!!!
2,258 views
Does density of a substance change when the volume of the substance change?
For example, if I had 10 mL of water and it has the
1 answer
asked by
henry
360 views
How many milliliters of a 15.0%, by mass solution of {KOH}(aq) (d = 1.14 g/mL) are required to produce 25.0 L of a solution with
4 answers
asked by
help!!!
1,630 views
A particular household ammonia solution (d= 0.97g/mL) is 6.8% NH3 by mass.
How many milliliters of this solution should be
9 answers
asked by
help!!!
1,438 views
what are the point groups for
mer- Co Cl3 (CO3) and fac- Co Cl3 (CO3)
1 answer
asked by
erin
492 views
A quantity of 16.13 mL of a KOH solution is needed to neutralize 0.4883 g of KHP. What is the concentration (in molarity) of the
2 answers
asked by
ash
502 views
Does anyone know a website that will help me identify the physical properties of compounds, elements, and mixtures? For example,
2 answers
asked by
Jen
514 views
If 60.0 mL of 0.150 M CaCl2 is added to 50.0 mL of 0.100 M AgNO3, what is the mass in grams of AgCl precipitate?
3 answers
asked by
ash
1,151 views
what does S.T.P mean?
1 answer
asked by
tegz
241 views
Please help me with these two problems:
1)How many electrons would it take to equal the mass of a proton? 2)What mass of
5 answers
asked by
sue
739 views
a solution that is 0.51 M CH3COOH and 0.28 M CH3COONa
is that a buffer? when can u tell when to us the henderson hasslebach
1 answer
asked by
Rick
376 views
NO2(g) → ½N2(g) + O2(g) DH1 = -33.9 kJ
NO2(g) → NO(g) + ½O2(g) DH2 = 56.5 kJ What is DH for the reaction ½N2(g) + ½O2(g)
1 answer
asked by
han
361 views
What is the structure of the white precipitate that forms when actophenone is added to a solution of phenylmagnesium bromide?
1 answer
asked by
yen
427 views
an (aq) ammonium chloride solution, rather than H2SO4, is used in the hydrolsis of the magnesium complex of 1,1-diphenylethanol
1 answer
asked by
yen
495 views
Calculate the pH of the solution that results from mixing the following four aqueous solutions together:
(1.) 100. mL of 0.300 M
6 answers
asked by
Anonymous
923 views
a soln. that is .195 M in CH3NH2 and .105 M in CH3NH3Br
what is the balanced equation for this ? How do you know ?
4 answers
asked by
natash
1,445 views
Some biphenyl(C6H5--C6C5) is produced as a by-product in the synthesis of benzoic acid . where does this come from?
1 answer
asked by
james
395 views
how do you find the number of electrons in an ionic compound chart, if you haven't been given the charge? Would someone be able
1 answer
asked by
micah
391 views
Is this a good way to define crystallization: decreasing the temperature or evaporating the solvent can create crystals?
1 answer
asked by
greg
330 views
A student placed 12.5 of glucose (C6H12O6) in a 100ml volumetric flask, added enough water to dissolve the glucose by swirling,
3 answers
asked by
tomi
1,611 views
Br
| CH3 - CH2 - CH - CH - CH2 -CH3 | CH2CH3 How would I name the structure above? Would it be 3-bromo-3-methylpentane?
10 answers
asked by
Lena
659 views
For methyl-2-butene how do I know what the methyl group is coming off of?
3 answers
asked by
Lena
371 views
if I had ethane reacting with chlorine would the chlorine remove two hydrogens and form dicholorethane?
5 answers
asked by
Lena
375 views
I have a question that say 2-butyne reacts with hydrogen and butane is the product. Wouldn't 2-butene be the product because
4 answers
asked by
Lena
844 views
for the equation:
propane + bromine how do I know on which carbon the Br would attatch itself to.
3 answers
asked by
Lena
447 views
how would I do the elimination reaction of 2-chloropentane.
When I figured it out I got the products as being 1-pentene and
3 answers
asked by
Lena
1,219 views
how do you balance
Al +Cl2-->Al+3 +Cl- 2 is a little subscript in the corner in the bottom. +3 and - go on the top corner. my
1 answer
asked by
jen
391 views
Why do we use excess reactants in a chemical reaction?
Why are percent yields usually less than 100%? Is it because we want to
3 answers
asked by
bob
427 views
What is the conjugate acid of H2PO4-? (Type your answer using the format format [H2PO4]- for H2PO4-
What is its conjugate base? i
3 answers
asked by
jake
565 views
When hydrochloric acid reacts with magnesium metal, hydrogen gas and aqueous magnesium chloride are produced. What volume of 1.0
5 answers
asked by
Anon
1,078 views
If pentane,hexane and hexanol are heated evenly at different altitudes, rank them according to the order in which you would
3 answers
asked by
alisha
587 views
How long would it take for 1.50mol of water at 100.0 degrees to be converted completely into steam if heat were added at a
2 answers
asked by
alisha
598 views
A 3.48 gram sample of sodium sulfate hydrate lost 1.35 gram of water when heated to constant weight. What is the formula of the
2 answers
asked by
Jenny
533 views
The pH of saturated Sr(OH)2 is found to be 13.12. A 15.0ml sample of saturated Sr(OH)2 is diluted to 250.0ml in a volumetric
4 answers
asked by
tomi
1,406 views
The following reaction is used in some self-contained breathing devices as a source of O2.
4KO2(s) + 2C02(g)---> 2K2CO3(s) +
1 answer
asked by
tomi
756 views
Lead metal is added to 0.140M Cr^+3(aq).
Pb(s)+ 2Cr^3+(aq)---> Pb^2+(aq) + 2Cr^2+(aq) a)What is [Pb^2+] when equilibrium is
1 answer
asked by
tomi
439 views
Lead metal is added to 0.140M Cr^+3(aq).
Pb(s)+ 2Cr^3+(aq)---> Pb^2+(aq) + 2Cr^2+(aq) a)What is [Pb^2+] when equilibrium is
2 answers
asked by
tomi
497 views
NaOH + HCl ------> NaCl + HOH
I need to figure out the quantity of heat in this reaction. The volume of the solution is 150 mL
2 answers
asked by
Lena
571 views
The following equation describes the oxidation of an acidified solution of sodium oxalate (Na2C2O4) by potassium
5 answers
asked by
tomi
877 views
What is the total number of orbitals possible for n = 3
3 answers
asked by
Sandra
454 views
The mass of the CuSO4 x 5H2O sample is 1.664 g. The mass of the recovered copper is 1.198 g.
Calculate the percent copper in pure
6 answers
asked by
Lou
2,235 views
The bond enthalpy of N2(g) is 418.0 kJ/mol. Calculate ÄH°f for N(g).
I figured that if it gave the enthalpy for N2, then the
1 answer
asked by
han
625 views
Calculate [H3O] in the following solutions.
5.15x10-2M HCl and 7.62x10-2M NaC2H3O2 Responses HCl + NaC2H3O2. It appears there is
5 answers
asked by
tomi
1,729 views
A sample of 7.80L of NH3(ammonia) gas at 22 degrees Celsius and 735torr is bubbled into a 0.350L solution of 0.400M HCl
3 answers
asked by
tomi
744 views
An unknown was prepared with the concentration of 0.000630 M. A Beer's Law plot was prepared using the absorbance values from
2 answers
asked by
eve
497 views
An unknown was prepared with the concentration of 0.000630 M. A Beer's Law plot was prepared using the absorbance values from
2 answers
asked by
eve
618 views
Calculate the root mean square speed (rms) for gaseous NH3 at 315 K
2 answers
asked by
Anonymous
494 views
The molecular formula is:
Na(s)+ H2O(l)---->NaOH(aq)+H2(g) This is showing a single displacement reaction.I am not sure how to
2 answers
asked by
Lenny
857 views
4Fe(s) + 3O2(g) → 2Fe2O3(s)
Identify the type of chemical reaction represented by this equation. is it redox?
4 answers
asked by
Anonymous
4,125 views
2Na(s) + 2H2O(l) ==> 2Na^+(aq) + 2OH^-(aq) + H2(g)
What is the the net ionic equation because it doesn't look like their is any
3 answers
asked by
Lenny
1,724 views
You are asked to bring the pH of 0.500L of 0.450M NH4Cl to 7.00.
a) Which of the following solutions would you use: 10.0M HCl or
1 answer
asked by
tomi
654 views
A 75.0mL sample of 1.56×10−2M Na2SO4(aq) is added to 75.0mL of 1.22×10−2M of Ca(NO3)2(aq).
What percentage of the Ca+
2 answers
asked by
tomi
1,125 views
A sample of 7.80L of NH3 (ammonia) gas at 22 degrees and 735mmHg is bubbled into a 0.350L solution of 0.400M HCL(hydrochloric
1 answer
asked by
tomi
816 views
You are asked to bring the pH of 0.500L of 0.450M NH4Cl to 7.00.
a) Which of the following solutions would you use: 10.0M HCl or
4 answers
asked by
tomi
695 views
A 75.0mL sample of 1.56×10−2M Na2SO4(aq) is added to 75.0mL of 1.22×10−2M of Ca(NO3)2(aq).
What percentage of the Ca+
3 answers
asked by
tomi
805 views
A sample of 7.80L of NH3 (ammonia) gas at 22 degrees and 735mmHg is bubbled into a 0.350L solution of 0.400M HCL(hydrochloric
3 answers
asked by
tomi
3,715 views
1.Pippete 20ml of 0.1M acetic acid and 20ml of 0.1M NaOH into a 100ml beaker (Remember that the final volume of this solution is
2 answers
asked by
tomi
617 views
The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is
4 answers
asked by
kristin
601 views
A solution of Acetic acid has a light red color in the presense of the indicator orange IV. When sodium acetate is added to the
1 answer
asked by
Joyce
509 views
so i took a sat ii subject practice test
and the question was true/false/ ionic bonds are the strongest bonds. answer was true
2 answers
asked by
Kerrie
839 views
the pH of a .100 M solution of sodium formate = 8.37. Calculate the value of Ka of formic acid.
okay so I know that the anion of
5 answers
asked by
Natash
1,148 views
i don't get this at all can you please show me how to do this problem:
a sample of oxygen occupies 10.0 L under a pressure of 105
1 answer
asked by
melissa
440 views
0.949 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 389C is observed.
Assume the solution's final
2 answers
asked by
Anonymous
937 views
If 20 g KCL is dissolved in 100g of water at 20 degrees C, is the solution unsaturated, saturated, or supersaturated?
5 answers
asked by
tom
757 views
Wwrite a balanced equation for the following chemical processes: the reaction between NaOH an dsalicyclic acid; the reaction
1 answer
asked by
Mandy
413 views
how many grams of a precipitate will form when you mix 45 ml of a 3.5M silver nitrate solution with 45 ml of a 5.4 M magnesium
3 answers
asked by
lyne
756 views
What mass of lithium (in g) is required to react completely with 59.1 mL of gas at STP? given the equation 6Li+N2=2Li3
3 answers
asked by
Anonymous
834 views
U have to show the partial charges and bond dipoles on my ;lewis structure of CH3Cl
For the partial charges would I just have a
6 answers
asked by
Lena
729 views
Calculate the [h3o+] and [oh-], pH and the percent dissociation for both 0.25 mol/L HCl and 0.25 mol/L HCN.
0.25 mol/L HCL [H+] =
6 answers
asked by
Lena
464 views
NH4Br has been dissolved into 1 L of water at 25 degrees celcius. the solution has a pH of 5.16. calculate number of grams of
4 answers
asked by
Lena
1,533 views
un-ionized aspirn molecules can readily penetrate the stomach lining into a region of less adicity. This is where the stomach
3 answers
asked by
Lena
874 views
The solubility product of silver sulfate is 1.6* 10^-5. What is the molar solubility of this compound?
Ksp= [Ag]^2[So4^2-]
2 answers
asked by
Sara
1,022 views
Equal volume of a 0.02 M Zn+ solution and a 2.0M NH3 solution are mixed. Kf for [Zn(NH3)4] is 4.1*10^8. If enough sodium oxalate
3 answers
asked by
Sara
855 views
What VSEPR “shapes” and bond angles do you find in Toluene?
3 answers
asked by
chrissy
1,663 views
What does it mean when the sulfuric acid in a chemical reaction is written ABOVE the arrow?
1 answer
asked by
chrissy
331 views
What is the amount of energy released when 3 carbon carbon triple bonds are broken?
4 answers
asked by
needs help
538 views
How many kilojoules of energy are released from the carbon carbon single bonds when Glucose (C6H12O6) is burned?
how would i do
4 answers
asked by
chrissy
456 views
Why are titrations using permanganate performed in acid solution?
1 answer
asked by
help
467 views
Why are titrations using permanganate performed in acid solution?
1 answer
asked by
help
407 views
What is the amount of energy released when 3 carbon carbon triple bonds are broken?
1 answer
asked by
chrissy
505 views
what VSEPR "shapes" and bond angles do you find Toluene
4 answers
asked by
lyne
989 views
if you were to react 14.00 grams of salicylic acid with 8.50 grams of acetic anhydride, what would your theoretical yield be?
the
1 answer
asked by
lyne
448 views
If you have a .045 M solution of sodium hydroxide, how many mL of the solution do you need to neutralize 6.5 mL of a .055 M
1 answer
asked by
sam
354 views
How many kilojoules of energy are released from the carbon carbon single bonds when glucose (C6H12O6) is burned???
i asked this
3 answers
asked by
jake
845 views
whats the smallest size container that will hold 500 g of water? 500 g of alcohol?
1 answer
asked by
jay
301 views
If 1.2 grams of sodium are reacted with 4.00 mL water, how much NaOH is produced? density of water= 1.00g/mL
11 answers
asked by
Andy
447 views
Does baking soda and vinegar have a complete ionic equation?
HC2H3O2 (aq) + NaHCO3 ===> NaC2H3O2(aq) +
3 answers
asked by
Lou
9,206 views
What mass of phosphoric acid will be produced from the reaction of 10.00g of P4O10 with excess water?
3 answers
asked by
Anonymous
1,534 views
A chemist requires some 3-hexanone for a reaction, but only has some 3-hexene available. Explain using chemical reactions, how
3 answers
asked by
jenna
1,672 views
Copper sulfate is a blue solid that is used as an algicide. Solutions of copper sulfate that come in contact with zinc metal
3 answers
asked by
Anonymous
906 views
Cola contains H3PO4. In order to determine the concentration of phosphoric acid in 50.0 mL of cola, a precipitation reaction
3 answers
asked by
Anonymous
1,809 views
If I added 60 drops of water to a beaker and weighed it, and then added another 60 drops of water to the breaker;
How would I
4 answers
asked by
lou
980 views
Why can proteins and carbohydrates be categorized as macromolecules as well?
3 answers
asked by
me
490 views
If a student needs to prepare 50g of bromobenzene and expects no more than a 75% yieldl, how much benzene should the student
2 answers
asked by
Sindy
503 views
NaNO3 + H2O >
2 answers
asked by
zenda
537 views
When 13 grams of a sample cools from 56c
to 34.4cit loses 25.8 Joules of heat. What is the specific heat of the sample?
1 answer
asked by
Mark
380 views
An unknown gas Q requires 1.80 times as long to effuse under the same conditions as the same amount of nitrogen gas. What is the
2 answers
asked by
Sheena
536 views
nicl2.6h2o + h2o+ nh3 chemical equation?
2 answers
asked by
aa
777 views
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