315 Answered Questions for the topic General Chemistry

09/27/15

I really really need some help with this percent yield problem? General Chemistry?
Silver is reacted with excess mercury (II) chloride, producing a solid silver chloride precipitate. If the actual yield of 25.5 g silver chloride represents a 77% yield, how much silver was... more
Follows • 2
Expert Answers •1
General Chemistry Chemistry

09/26/15

Limiting reactant problem, chemistry?
Can you please check my answers?   What is the maximum mass of hydrogen gas that can be produced from 5.70 g SrH2 and 4.75g H2O?    SrH2 (s) + 2H2O (l) -----> Sr(OH)2 (s) + 2H2... more
Follows • 3
Expert Answers •2

09/26/15

Chemistry Percent Yield Problem? Can you please help me?
Silver is reacted with excess mercury (II) chloride, producing a solid silver chloride precipitate. If the actual yield of 25.5 g silver chloride represents a 77% yield, how much silver was... more
Follows • 2
Expert Answers •1
General Chemistry Chemistry Chemistry Conversion

09/21/15

A sample of nitrogen gas, N2, contains 1.33 x 10^24 total atoms of nitrogen, N. How many moles of nitrogen molecules are present?
Can you please describe how you get your answer? I want to learn what the answer is and how to figure it out so I can know how to do similar problems in the future. Thank you for your help!
Follows • 2
Expert Answers •1
General Chemistry

09/07/15

which has the largest mass?
0.00889Gg, 0.00889Tg, 0.00889Mg, 0.00889dg, 0.00889g
Follows • 2
Expert Answers •1
General Chemistry Chemistry Chemistry General

09/07/15

A radioactive source emits particles that are deflected away from the positive plate in an electric field. Identify the particles being emitted.
Please explain your answer.   Can someone please EXPLAIN how you get the answer? I am so lost and would greatly appreciate the help. 
Follows • 2
Expert Answers •1
General Chemistry

08/18/15

Is Mn(C2H3O2)2 soluble?
Well that's pretty much it I can't tell by the rules I know.
Follows • 2
Expert Answers •1

07/05/15

Help with chemistry - Arrhenius Equation
I am aware of the derivations of the Arrhenius equation but for some reason I am doing something wrong along the way and I need to figure this out! Could someone please show me the... more
Follows • 2
Expert Answers •1
General Chemistry

06/21/15

chemistry electrolyte and amount of substance related question
A certain quantity of electricity is passed through aqueous solution of AgNO3 and   CuSO4 connected in the series . If Ag (at wgt. 108) deposited at the cathode is 1.08 g , then Cu deposited at the... more
Follows • 2
Expert Answers •1
General Chemistry

06/17/15

a cube of sodium 15.0cm on one side weighs 3.28 kg. what is the density of sodium in grams/cubic centimeter? calculate the following
please answer my assignmnt now thank you. can you give the exact answer?  
Follows • 2
Expert Answers •1
General Chemistry

06/17/15

suppose a crown weighs 1325g and has a volume of 124.0cm3. what is the density of the crown.
please answer my assignment. thank you
Follows • 2
Expert Answers •1
General Chemistry Chemistry

06/17/15

chemistry conversion help needed please.....
13.5 g of Aluminium when changes to Al3+  ion , in solution , will be :    9.0 X 1023   electrons  3.01 X 1023  electrons 6.023 X 1023 electrons 18.0  X 1023 electrons
Follows • 2
Expert Answers •1
General Chemistry

06/10/15

chemistry enthalpy related question
If bond energy of   C-H bond is 99 k cal and given that  2C (S)+  2H2(g) →    C2H4 (g) ,  ΔH = 12.5 k cal  2C (S)+  2C (g) , ΔH (g) ,      ΔH =  2 x 170.5  k cal  2H2(g)   →   4H (g)     ,    ... more
Follows • 2
Expert Answers •1
General Chemistry Chemistry Lab Titration

06/08/15

If 5 g of sodium bicarbonate is combined with water to make a 100 ml solution, how do I find out how many grams in the final solution?
In chem lab we did a quality control test to determine if the label for sodium bicarbonate (baking soda) is accurate. The label says there is 1,258.56 mg of sodium in a 5 g serving. We made a... more
Follows • 2
Expert Answers •1
General Chemistry

04/27/15

rate constant for a second-order reaction is .80 m-1 sec-1. (continued question in description)
Calculate the half-life of this reaction if the initial concentration of the reactant is .072m?
Follows • 2
Expert Answers •1
General Chemistry

04/27/15

what is the half-life is a first order reaction if 75% of the reactant has been consumed after 60 minutes?
 I need help with chem homework 
Follows • 2
Expert Answers •1
General Chemistry

04/17/15

Does SiO2 lattice structure contain any intermolecular attraction forces?
I was told by my teacher that SiO2 lattice does not contain any intermolecular attraction forces. But if so, how is the lattice kept as it is? And is there any method to exactly know whether a... more
Follows • 2
Expert Answers •1
General Chemistry Chemistry

02/16/15

A particular reactant decomposes with a half-life of 107 s when its initial concentration is 0.349 M.
I don't understand this please help   A particular reactant decomposes with a half-life of 107 s when its initial concentration is 0.349 M. The same reactant decomposes with a half-life of 239 s... more
Follows • 2
Expert Answers •1
General Chemistry Chemistry

02/16/15

The rate constant for this second-order reaction is 0.890 M–1·s–1 at 300 °C. A---> Products
The rate constant for this second-order reaction is 0.890 M–1·s–1 at 300 °C. A---> Products How long (in seconds) would it take for the concentration of A to decrease from 0.800 M to 0.360 M?
Follows • 2
Expert Answers •1
General Chemistry

01/23/15

At 1 atm, how much energy is required to heat 75.0 g of H2O(s) at –18.0 °C to H2O(g) at 121.0 °C?
I have tried this over and over and keep getting it wrong!
Follows • 2
Expert Answers •1
General Chemistry Chemistry Chemistry Lab

01/14/15

Calculate the moles of NaCl in the following aliquot...
a solution was prepared adding 23.512g of NaCl to enough water to obtain 250.00mL of solution. A 10.0mL aliquot of the solution was taken. Calculate the moles of NaCl in the aliquot. 
Follows • 2
Expert Answers •1

12/21/14

Percent Composition Problems
I need a brief example on how to solve Percent Composition probs please. Oh and btw how I can I tell when a compound is ionic or covalent ?  
Follows • 2
Expert Answers •1
General Chemistry Math Chemistry Organic Chemistry

12/17/14

A 4.000 g mixture of an alkali metal chloride (XCl) and an alkaline metal chloride (YCl2) was dissolved in 150.0 g of water.?
Update : The freezing pt of solution is -1.815. When excess silver nitrate is added, a white percipitate forms. The mass of precipitate formed is 11.165. What mass of Xcl and YCl were originally in... more
Follows • 2
Expert Answers •1
General Chemistry Chemistry

12/11/14

what important nonmetal element is in this compound?
what important nonmetal element is in this compound?          
Follows • 1
Expert Answers •1
General Chemistry College Chemistry

12/09/14

Calculating E° Problem, just need to be pointed in the right direction! Double Karma points for any advice offered!
Okay, so I have a half reaction (a reduction), Cd(IO3)2(S) + 2e- ----> Cd(s) + 2IO3-, for which I need to calculate E°. E° for Cd2+ --> Cd(s) is given as -0.402V, and Ksp for Cd(IO3)2 is... more
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.