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valkas [14]
3 years ago
12

Name two objects which are colourless liquid​

Chemistry
2 answers:
ivolga24 [154]3 years ago
8 0
Water and lethal alcohol
mina [271]3 years ago
4 0

Answer:

water and asid sulfuric

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If you obtained 2.50 moles of CuSO4 from the reaction of CuO and H2SO4, but the theoretical yield was 3.19 moles, what was the p
IceJOKER [234]

Answer:

  • 78.4%

Explanation:

Just as context, write the chemical equation and the mole ratios

1) <u>Balanced chemical equation</u>:

  • CuO (s) +  H₂SO₄ (aq) → CuSO₄ (aq) + H₂O (l)

2) <u>Therotetical (stoichiometric) mole ratios</u>:

  • 1 mol CuO : 1 mol  H₂SO₄  : 1 mol CuSO₄  : 1 mol H₂O

You can calculate the percent yield from the amount of CuSO₄ obtained and the theoretical yield

3) <u>Percent yield</u>

  • Definition:

         Percent yield = (actual yield / theoretical yield)×100

  • Theoretical yiedl (given): 3.19 moles CuSO₄

  • Actual yield (given): 2.50 moles CuSO₄

  • Calcualtion:

Substitute the values in the formula:

  • Percent yield = (2.50 moles CuSO₄ / 3.19 moles CuSO₄)×100 = 78.4%

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4 years ago
Describe the nature and variety of instruments used to detect radiation.
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A variety of handheld and laboratoryinstruments is available for detectingand measuring radiation. ... Geiger Counter, with Geiger-Mueller (GM) Tube or Probe—A GM tube is a gas-filled device that, when a high voltage is applied, creates an electrical pulse when radiation interacts with the wall or gas in the tube.
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How have levels of carbon dioxide changed in the past 100 years please help quick
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A particular flask has a mass of 17.4916 g when empty. When filled with ordinary water at 20.0°c (density = 0.9982 g/ml), the ma
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The mass of the empty flask is 17.4916 g. Now after feeling the ordinary water the mass of the flask is 43.9616 g. Thus the change of weight due to addition of ordinary water is (43.9616 - 17.4916) = 26.47 g.

Now as the density of the ordinary water at 20°C is 0.9982 g/ml, so 26.47 g is equivalent to \frac{26.47}{0.9982}=26.5177 mL of water. Thus the capacity of the flask is 26.5177 mL.

Now the density of heavy water is 1.1053 g/mL at 20°C. Thus 26.5177 mL of heavy water is equivalent to (1.1053×26.5177) = 29.310 g.

Thus the total weight of the flask filled with heavy water will be (17.4916 + 29.310) = 46.8016 g at 20°C.  

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