Chemistry

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  Can I be transracial?

  4 Answers19 hours ago
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  How to remove glue / adhesive residue from metal?

  How to remove glue / adhesive residue from metal. I need to remove the "cloudy patch" around the tower without scrubbing and without damaging the coin. This coin had a painted design glued on it. When the design was removed, the residues of the glue can be seen. I have tried acetone, petrol, sanitiser, glue remover, even dichloromethane but no luck. This coin had the design glued on 10 years ago and it is made of copper and nickel. Can anyone help me with what chemical, solution to use. Thank you

  5 Answers6 days ago
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  A sample of gas has an initial pressure of 1.50 atm at a volume of 3.40 L at a temperature of 20.0°C. ?

  Favorite Answer:

  (3.40 L) / (20.0 + 273.15) K x (20.0 + 10.0 + 273.15) K x (1.50 atm / 2.50 atm) =

  2.11 L

  4 Answers6 days ago
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  4grams of sugar in a teaspoon looks like?

  7 Answers1 week ago
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  If our state was represented by just one food, what would it be?

  Favorite Answer:

  Granola. Fruits, nuts, and flakes.

  6 Answers1 week ago
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  Where can you see or use Lithium????

  9 Answers2 weeks ago
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  one mole of a gas occupies 22.4 L at 0°C and 760 mm Hg. ?

  Favorite Answer:

  (22.4 L/mol) x (2.00 mol) = 44.8 L

  (760 mmHg) x (44.8 L / 3.00 L) x (25 + 273) K / (273 K) = 12389 mmHg =

  12400 mmHg

  [Kenny B: Knowing the molar volume relieves you from knowing any value for R.]

  4 Answers1 week ago
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  Pure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen.  ?

  Favorite Answer:

  2 Mg + O2 → 2 MgO

  (4.99 g Mg) / (24.30506 g Mg/mol) = 0.20531 mol Mg

  (8.79 g O2) / (31.99886 g O2/mol) = 0.27470 mol O2

  0.20531 mole of Mg would react completely with 0.20531 x (1/2) = 0.102655 mole of O2, but there is more O2 present than that, so O2 is in excess and

  Mg is the limiting reactant.

  (0.20531 mol Mg) x (2 mol MgO / 2 mol Mg) x (40.3044 g MgO/mol) x (84.5 / 100) =

  6.99 g MgO (product)

  5 Answers3 weeks ago
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  What does phenolphthalein do?

  Favorite Answer:

  It turns color to indicate the pH of a liquid solution.  It's also pretty good for weeding people out of spelling bees.  

  5 Answers3 weeks ago
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  What is the conversion factor relating volume and moles called? Write the relationship or the conversion factor.?

  6 Answers3 weeks ago
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  what are the uses of dry ice ?

  8 Answers4 weeks ago
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  What's stronger than acid?

  Favorite Answer:

  Acids aren't all equally powerful, they come in different concentrations.  That's the important thing.  One can even drink weak acids but drinking concentrated acids would cause a painful death.  It's like asking how long is a piece of string?

  11 Answers4 weeks ago
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  Is carbon a gas at stp ?

  5 Answers3 weeks ago
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  What chemical is best for dissolving flesh? For a story?

  I'm writing a book, chill. I just want to know so it can be accurate. Hydrofluoric acid was my original choice, but then Sodium Hydroxide came up and a few others, which would be the fastest? [Ok it's not just for the story, but I'm really into criminal cases and I'm curious so-]

  5 Answers4 weeks ago
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  Is a steak well balanced?

  7 Answers4 weeks ago
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  What is Kc?

   I filled out the ICE chart which is the photo attached. Kc=[HI]^2/[H2][I2]

  I used values from the E part of the chart. Should I be using different values or was it a calculation error? My answer was incorrect. 

  I2 E was 0.0500 if you cannot read it. And 2HI E was 5.2 

  4 Answers4 weeks ago
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  Why don't things melt when we touch them?

  You would think that any atom touching any other atom would have an ill resulted chemical reaction.

  7 Answers1 month ago
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  is this correct?

  9. What volume of oxygen (in cm3) is required for the complete combustion of 2.32 g of butane?

  2 C4H10 (l) + 13 O2 (g)  8 CO2 (g) + 10 H2O (l)

  Molar mass of butane = (4 x 12) + (10 x 1) = 58 g/mol

  Moles = mass / molar mass = 2.32 / 58 = 0.04 mol

  Reacting ratio of C4H10 to O2 = 2 : 13 = 1 : 6.5

  Moles of O2 = 0.04 x 6.5 = 0.26 mol

  Volume = moles x 24 = 0.26 x 24 = 6.24 cm3

  6 Answers1 month ago
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  Can a atomic bomb blast start a chain reaction if blast is near a missile  silo?

  4 Answers1 month ago
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  Why would someone's urine be light brown after drinking 2 litres of water a day?

  4 Answers1 month ago