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Harrizon [31]
4 years ago
10

Today you will be using the bunsen burner in your experiment. Which of the following is a precaution that should be taken before

beginning?
Chemistry
1 answer:
sergij07 [2.7K]4 years ago
3 0

Answer:

See the answer below

Explanation:

Although there are no specific options available to choose from, some of the general safety measures or precautions that must be observed when using a bunsen burner are as follows:

  • <em>Always leave, at least, 12 inches of space between the bunsen burner and the nearest object. This is to avoid the nearby object catching fire accidentally.</em>
  • <em>Always watch the flame at all times, never leave it unattended to.</em>
  • <em>Burners should not be handled unless ample time has been given for them to cool down. This is to avoid burning-related injuries.</em>
  • <em>Burner fittings should be carefully checked to ensure there are no leakages. Gas leakages may cause serious accidents.</em>
  • <em>Always use a sparker as this is safer than using matches or lighter.</em>
  • <em>The gas supply must always be turned off whenever the burner is not in use.</em>
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Answer:

Cu₃(PO₄)₂(s), RbNO₃(aq)

Explanation:

This reaction looks like a possible <em>double replacement reaction</em>, in which the metal ions have exchanged partners.

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You must recall the pertinent <em>solubility rules</em>:

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2. Salts containing nitrate ions (NO₃⁻) are soluble.

3. Most salts containing phosphate ions (PO₄³⁻) are insoluble

According to Rules 1 and 1, RbNO₃ is soluble.

According to Rule 3, Cu₃(PO₄)₂ is insoluble.

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6 0
4 years ago
A type of marble has a density of 2.5 grams/marble. A box filled with marbles has a total mass of 300 grams determine the number
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Answer:

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Explanation:

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Not hard, right?

Step 2: Divide 250 by 2.5

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Hope this helps :)

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