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SVETLANKA909090 [29]
3 years ago
5

Students should come into contact with chemicals only if?

Chemistry
1 answer:
Eva8 [605]3 years ago
3 0

They are properly geared

Explanation:

Students should come into contact with chemical only if they are properly geared.

Chemical are substances produced from the reaction of compounds with one another. Most chemicals are toxic and harmful to the human body.

To handle chemicals, students must be prepared and be properly geared.

  • It is good to know a chemical before handling it.
  • Use appropriate apparatus in the laboratory.
  • Abide with safety rules in laboratories.
  • Wear laboratory coats at all time.
  • Wear safety boots.
  • Wear nose covers to prevent inhalation of harmful gases.
  • Wear safety googles.
  • Handle equipment with utmost care.
  • Do not be careless in the laboratory.
  • Do not eat, drink or play in the laboratory.

Learn more:

Laboratory brainly.com/question/10896467

#learnwithBrainly

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Consider stoichiometric combustion of gasoline and air. Assume a full tank of gasoline holds 50 L (approximately 13.2 gallons),
Inessa05 [86]

Answer:

520 kg

Explanation:

Let's consider the combustion of isooctane.

C₈H₁₈(l) + 12.5 O₂(g) → 8 CO₂(g) +  9 H₂O(l)

We can establish the following relations:

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  • The molar ratio of C₈H₁₈ to O₂ is 1:12.5.
  • The mole fraction of O₂ in air is 0.21.
  • The molar mass of air is 28.96 g/mol.

50 L of isooctane require the following mass of air.

50 \times 10^{3}mLC_{8}H_{18}.\frac{0.690gC_{8}H_{18}}{1mLC_{8}H_{18}} .\frac{1molC_{8}H_{18}}{114.22gC_{8}H_{18}} .\frac{12.5molO_{2}}{1molC_{8}H_{18}} .\frac{1molAir}{0.21molO_{2}} .\frac{28.96 \times 10^{-3}kgAir}{1molAir} =520kgAir

5 0
4 years ago
How many formula units make up 20.6 g of magnesium chloride (MgCl2)?
irina [24]

Answer:The formula of magnesium chloride is MgCl2 . The molar mass of MgCl2 is (24.30 + 2 × 35.45) g/mol=95.20 g/mol .

Explanation:

5 0
3 years ago
Determine the number of molecules in 0.0500 mole of boron tribromide<br> (show work)
OleMash [197]

Answer:

There are 0.5 moles

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number  of particles.

To calculate the moles, we use the equation:

Thus there are 0.5 moles

Explanation:

7 0
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What is the molarity of a strong acid solution with a pH of 3?
Anna35 [415]

Answer:

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Explanation:

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3 years ago
Heat energy is transferred by conduction whenever molecules?
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I think the answer is D

8 0
4 years ago
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