Questions LLC
Login
or
Sign Up
Ask a New Question
Science and Chemistry
Page 3
Questions (187)
A common flaw in calorimetry experiments to determine the molar enthalpy of solution is to have a mass of solute that is
1 answer
asked by
bob
561 views
I already asked Drbob222 for a substance that i cantake to school wich contains an aromatic compund, I'm not suppose to buy
1 answer
asked by
Iveth
440 views
why will an eggshell dissolve in the acetic acid of vinegar and not the phosphoric acid of coca cola?
Acetic acid reacts with the
1 answer
asked by
rishi
615 views
Does anyone have the tests for iron(II) and iron(III) ions lab done?
If you want to know something about Fe(II) and Fe(III)
1 answer
asked by
Melissa
474 views
Where can i find drawing of electron dot stuctures for compounds like BR2 and HCN
HCN is at the link below.
1 answer
asked by
Lance
687 views
Evan wants to make a turquoise-colored dye for coloring-boiled eggs. They mix 3 parts blue dye and 2 parts green dye. What
1 answer
asked by
I know where you live!
47 views
Atomic Structure Unit Test
6 of 186 of 18 Items Question Use the periodic table to answer the question. An illustration shows the
1 answer
asked anonymously
108 views
Trifunctional amino acid
1 answer
asked by
Those who want to be...
24 views
What are three common types of products produced by reactions that occur in aqueous solutions? (out of the following)
-gases
4 answers
asked by
Anya
3,568 views
Describe how you would separate a mixture of charcoal, iron filling, salt and water. what phases of matter are included in this
3 answers
asked by
Laila solis
1,761 views
I'm having trouble getting the right answer for a problem, I'm hoping that by posting my work someone can help me figure out
4 answers
asked by
Alexandria
1,674 views
Name 2 elements that would have properties similar to Beryllium with atomic weight higher than 130.
4 answers
asked by
teacher1
1,557 views
is motor oil a homogeneous mixture or a compound? why?
is iron smelting a chemical or physical process? I call oil a homogeneous
3 answers
asked by
helly
1,570 views
Count the number of TOTAL number of atoms in each compound listed below.
Na2(SO4)2 a.16 total atoms b.12 total atoms c.4 total
1 answer
asked anonymously
58 views
Which statement best describes the type of bond shown in the diagram
1 answer
asked by
Me
25 views
Scientist that heats 30 grams of calcium carbonate CaCO3 in the chemical reaction shown what is the total mass of the products
1 answer
asked anonymously
17 views
Lenny is mating his
dry soap. The recipe calls for 2 parts borax, 2 parts washing soda, and 1 part soap flakes. if Lenny uses 7
1 answer
asked anonymously
35 views
What is the molar mass of KI(Potassium iodide)?
Here is a site for all your molar mass calculations.
1 answer
asked by
Bryan
1,295 views
how to balance this equation?
(NH4)2Cr2O7 ---- Cr2O3 + N2 + H2O plz tell step by step.i m a beginner
2 answers
asked by
abdullah
1,274 views
Earlier I asked does the following represent an equilibrium situation:
1) A glass of iced tea still has sugar at the bottom after
2 answers
asked by
maria
1,247 views
If a student used an iron scoopula, instead of a plastic one, to add the unknown metal to the HCl solution, will it affect the
2 answers
asked by
Ella
1,159 views
Classify the reaction as a synthesis ,
decomposition,single replacement, combustion, or double replacement reaction. C3H6O + 4 O2
1 answer
asked anonymously
53 views
Balance this equation. If a coefficient of "1" is required, choose "blank" for that box.
C + Fe2O3 → CO2 + Fe
2 answers
asked by
Antonia
1,062 views
these are my homework questions can you answer any???there are 4
1 A pupil placed some magnesium in a gas jar of oxygen How could
1 answer
asked by
lauren
1,036 views
hi, i am trying to develop a lab where i find the solubility of Sodium acetate. I was wondering in i was in the right path.
We
5 answers
asked by
chemistrybuddy
1,030 views
Question A recipe for a cake calls for both liquid and dry ingredients. If you are following the recipe, how will the order in
1 answer
asked anonymously
44 views
How do you make 5% ammonium oxalate? I know the mass is 142.11g.
2 answers
asked by
Jeff
958 views
What happens to your tongue when you lick an aluminum ice cream scrapper just after it has been used? Does it stick to the
3 answers
asked by
Anonymous
927 views
what are the steps on how to balance Al + O2 -----> Al2O3
2 answers
asked by
Anna
891 views
Process by which atoms or one substance are rearranged to form different substances?
a.Valence electrons b.Ion c.Law of
1 answer
asked anonymously
51 views
Ethanol (grain alcohol) has a density of 0.789 grams per centimeter cubed, How many cubic centimeters of ethanol must be poured
2 answers
asked by
Cedquandra
838 views
Describe how you would prepare 500 ml of a solution that is 40% bleach solution by volume.
2 answers
asked by
Jessi
816 views
All of the following ions are in higher concentration in the extracellular fluid except:
K+ Na+ Ca2+ Cl-
1 answer
asked by
Francis
33 views
I got through the first part easily, got -352.9kJ
Having trouble with the second part "The meals-ready-to-eat (MREs) in the
2 answers
asked by
Anonymous
816 views
I did a lab for Organic Chemistry
I did a simple distillation for an unknown and found that it boiled at 76 degrees. I also found
1 answer
asked by
Omar
782 views
Potassium-42 has a half-life of 12.4 hours. How much of a 1600g sample of potassium-42 will be left after 36.0 hours?
3 answers
asked by
Giovanni
691 views
When calling the families on the periodic chart by the top or first name in the column, where hydrogen is a non metal, and in
3 answers
asked by
lulu
646 views
how to prepare 500ml of a 0.75M Sodium Phosphate buffer solution at pH 7.5, how would you go about doing that?
2 answers
asked by
Jenna
659 views
A goal of the acid-base titration in this scenario is to determine the concentration of sodium hydroxide solution. To do this, a
1 answer
asked by
Seth
641 views
coppertone sport ultra sweatproof-spf 15 dry lotion contains 1.2 mg of otylmethoxycinnamate per fluid oz. how many micrograms of
2 answers
asked by
Anonymous
621 views
Consider an atom whose designation is given as 94 Pu 242. How many Protons are found in this atom?
http://www.chemicalelements.co
1 answer
asked by
Jim
620 views
I need two real life examples of chemical reactions that require high activation energy. Please help.
4 answers
asked by
Annie
613 views
please help!
how do i find the molecular mass of C3H5O2 molecular mass of 292 g.
3 answers
asked by
joshua
603 views
how are ammonia, salt and water alike?
how is salt different from glucose, salt and water?
4 answers
asked by
dawn
593 views
How to prepare 0.2M of NaOH in 250ml volumetric flask???
2 answers
asked by
Irina
594 views
When is an isotope considered stable?
_(Select all that apply.)_ The isotope does not emit a form of radiation. The isotope’s
2 answers
asked by
Quinn
598 views
What is the molality of a solution composed
of 11.1 g NaCl dissolved in 638 g of water? Answer in units of m.
2 answers
asked by
Tony
570 views
How much Ca(NO3)2 should be weighed out to have 0.650?
To have 0.650 what of what. Do you want 0.650 g Ca?
2 answers
asked by
Bob
552 views
I have to find the theoretical yield of acetylsalicylic acid in the exeriment?
I used 5.0 mL acetic anhydride which is about 5.40
3 answers
asked by
casey
540 views
Hi, Can anyone suggest a protocol for preparing 1 Litre ammonical solution (pH 7.8, NH4-N, 3000 mg/L) from NH4Cl and NaOH? I
2 answers
asked by
niko
543 views
Pages
1
2
3
4
Parent Categories (1)
Writing and Research