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Science and Chemistry
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Questions (187)
If the heat from burning 6.000 g of
C6H6 2C6H6(l) + 15O2(g) -> 12CO2(g) + 6H2O(l) + 6542 kJ is added to 5691 g of water at 21
2 answers
asked by
Angela
551 views
Hi,
How do you know how many ligands a metal ion needs to form a complex ion? So for example, with (Fe(H20)6)2+, how am I
2 answers
asked by
Maria
519 views
Need to write a brief description of the procedure required to make 900mL of a 0.5 M NaCl solution. The formula weight of NaCl
4 answers
asked by
Debbie
527 views
What is the percent composition for Lucky Charms?
2 answers
asked by
Anonymous
496 views
For lipids to be considered saturated, it means that it saturated or full of which of the following molecules?
Oxygen Hydrogen
1 answer
asked by
idk
55 views
I have a lot of questions on identify(ing) the functional groups in molecules. I am not sure how to go about finding these
5 answers
asked by
Beth
537 views
How do we prepare 500mL of 0.5 percent w/v solution of NaOH if we have stock solution of 50 percent w/v NaOH on hand?
2 answers
asked by
Stacy
499 views
how do I prepare 10% HCL from 50% HCL solution
2 answers
asked by
slindile
485 views
three blocks of coal were analyzed by four chemists and the ash-content in the block was found to be under
blocks chemists 1 11
2 answers
asked by
sireesha
506 views
Dry ice is solid carbon dioxide. Instead of melting, solid carbon dioxide sublimes according to the equation: CO2(s)→CO2(g).
2 answers
asked by
AH
513 views
If the specific optical rotation specification for a sample is
-48 to -51 deg, which is the Upper Specification Limit? Is it -48
2 answers
asked by
jessie
498 views
I am trying to complete one of those charts, where you find an element, its proton number, its electron number, it's charge, and
2 answers
asked by
Corinne
481 views
Add 0.40 g of NaOH to 50.0 mL of 0.10 M HCOOH, and find approximate pH. No volume change, Ka HCOOH=1.8x10^-4.
I recomputed this
2 answers
asked by
Jim
501 views
Assume you are in a lab with a test tube of sulfuric acid. You drop a piece of calcium into the tube. What do you observe
2 answers
asked by
roma
498 views
I know I posted this and it got a response, but unfortunately for me the reponse has got me confused, sorry Bob.
Fe3+ (aq), Ca2+
2 answers
asked by
Kali
474 views
Which substance evaporate fast:distilled water,ethanol,aceton and methylated spirit
2 answers
asked by
Nqobile
491 views
I am having a ton of trouble with this lab question, I do not understand it at all. The question is:
Show how the rate of
1 answer
asked by
blue fire
477 views
How would you prepare 100 ml of 0.9% w/v saline?
1 answer
asked by
Jessi
464 views
Does anyone know what this compound is:
C2H3ClBrF? I need a skeleton diagram. Many thanks Sue
3 answers
asked by
sue
470 views
Can I make slime out of felt glue?
3 answers
asked anonymously
35 views
A company is making detergent out of soap and water. They made one batch that has 30% soap and another batch which is 60% soap.
1 answer
asked by
Anonymous
475 views
How many kilojoules are released when 90.0 methanol is burned?
I know the answer is 1020 kj but have NO idea how to get it, or
1 answer
asked by
michelle
444 views
if 37.9 liters of NO at .993atm and 146 degrees celcius are decomposed by the reaction 2NO-->N2+O2
how many grams of nitrogen
1 answer
asked by
TIFFANY
439 views
Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement
11 answers
asked anonymously
39 views
The image is a model of sulfuric I said that has a chemical formula of h2so4. And one to two sentences explain why creating
1 answer
asked by
Ai pls help me
31 views
Which statement best describes what it means when something is classified as a strong acid
1 answer
asked by
Anon
54 views
What is avogadro's law
1 answer
asked by
utsman
432 views
Use the following chemical equation. (3 points)
H2+O2→2H2O Using the drop down box selection, construct a statement that
1 answer
asked by
ash markens
57 views
The modern day periodic table is organized by what?
a. Number of Neutrons b. Number of Protons c. Number of Electrons
1 answer
asked anonymously
33 views
Calculate the molecular masses (in amu the following compounds:
a. sulfur diaxide (SO2), a gas that is responsible for acid rain,
1 answer
asked anonymously
37 views
Use the trends in reactivity above to decide if statement below is TRUE or FALSE.
Column A 1. The reactivity of nonmetals
1 answer
asked anonymously
32 views
Which substance is known as the universal solvent?
a gasoline b water c vinegar d oil
1 answer
asked by
yoyo808
17 views
Beer with a pH of 4.51 would it be acid, base or neutral
1 answer
asked anonymously
26 views
What properties apply to butane
1 answer
asked anonymously
11 views
Which mixture is homogeneous?
salad dressing milk soil granola cereal
1 answer
asked by
e
28 views
What is the periodic and group for the elements fe and si
1 answer
asked anonymously
16 views
Give me all the atom and molecule label parts
3 answers
asked anonymously
20 views
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