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Sholpan [36]
3 years ago
7

9 different lab rules Explain how students will do a safe lab

Chemistry
2 answers:
Oksanka [162]3 years ago
7 0
1. Wear equipment at all times when doing procedures.
2. If something breaks step away and do not try to fix it
3. Do not smell or eat the chemicals it is very dangerous
4. Do not put anything up to your eye.
5. Make sure you do not wear something loose so it does not interfere with anything.
6. Do not run or anything with testing tubes.
7. Pay close attention when doing something with chemicals, you do not want to go wrong or explore something up.
8. If glass breaks or something goes wrong, such as accidents or injuries tell the teacher.
9. Do not take off anything you are suppose to wear in class, such as safety goggles, also do not try to mess with chemicals.
motikmotik3 years ago
4 0

Answer:

  1. Report all accidents, injuries and breakage of class or equipment to instructor immediately.
  2. Keep pathways clear by placing extra items on the shelves or under the work tables. If under the tables make sure that these items can no be stepped on.
  3. Long hair (chin-length or longer) must be tied back to avoid catching fire.
  4. Wear sensible clothing including footwear. Loose clothing should be secure so they do not get caught in a flame or chemicals.
  5. Work quietly - know what you are doing by reading the assigned experiment before you start to work. Pay close attention to any cautions described in the laboratory exercises.
  6. Do not taste or smell chemicals.
  7. Wear safety goggles to protect your eyes when heating substances, dissecting, etc
  8. Do not attempt to change the position of glass tubing in a stopper.
  9. Never point a test tube being heated at another student or yourself. Never look into a test tube while you are heating it.

Hope this helps:))

Please mark me as Brainliest.

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A 0.055 mol sample of formaldehyde vapor, CH2O, was placed in a heated 500 mL vessel and some of it decomposed. The reaction is
Elis [28]

Answer:

Kc for this reaction is 0.06825

Explanation:

Step 1: Data given

Number of moles formaldehyde CH2O = 0.055 moles

Volume = 500 mL = 0.500 L

At equilibrium, the CH2O(g) concentration = 0.051 mol

Step 2: The balanced equation

CH2O  <=>  H2 + CO

Step 3: Calculate the initial concentrations

Concentration = moles / volume

[CH2O] = 0.055 moles . 0.500 L

[CH2O] = 0.11 M

[H2] = 0M

[CO] = 0M

Step 4: The concentration at the equilibrium

[CH2O] = 0.11 - X M = 0.051 M

[H2] = XM

[CO] = XM

[CH2O] = 0.11 - X M = 0.051 M

X = 0.11 - 0.051 = 0.059

[H2] = XM = 0.059 M

[CO] = XM = 0.059 M

Step 5: Calculate Kc

Kc = [H2][CO]/[CHO]

Kc = (0.059 * 0.059) / 0.051

Kc = 0.06825

Kc for this reaction is 0.06825

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3 years ago
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Answer:

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Answer:

d

Explanation:

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They also have the same % composition, with a ratio of 1 carbon : 2 hydrogen : 1 oxygen. Therefore, c is correct.

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Plasma:
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Result:
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