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kobusy [5.1K]
3 years ago
11

Ethan makes the table below to record his observations when mixing baking soda and vinegar in a beaker. Ethan claims that a chem

ical change has occurred. Which statement provides the BEST evidence to support his claim?

Chemistry
2 answers:
damaskus [11]3 years ago
7 0

The statement which best provides support for the fact that a chemical change has occurred is that many bubbles formed after mixing.

In a chemical change, new substances are formed and there is a recombination of the atoms in reactants as the products are being formed.

There are several cues that indicate that a chemical change has taken place such as;

  • Appearance of a solid in an aqueous phase reaction.
  • Evolution of gas
  • Sudden change in the temperature of the system
  • Change in the color of the system

In the particular instance in this question, when baking soda and vinegar were mixed together, a gas was evolved signifying that a chemical change has taken place.

Learn more: brainly.com/question/1161517

kozerog [31]3 years ago
3 0

Answer: a

Explanation:

Many bubbles formed after mixing.

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3 years ago
3.8 liters of sulfur vapor, S8(g), at 921.4°C and 5.87 atm is burned in excess pure oxygen gas to give sulfur dioxide gas measur
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Answer:

116.5 g of SO₂ are formed

Explanation:

The reaction is:

S₈(g) +  8O₂(g)  → 8SO₂ (g)

Let's identify the moles of sulfur vapor, by the Ideal Gases Law

We convert the 921.4°C to Absolute T° → 921.4°C + 273 = 1194.4 K

5.87 atm . 3.8L = n . 0.082 L.atm/mol.K . 1194.4K

(5.87 atm . 3.8L) / (0.082 L.atm/mol.K . 1194.4K) = n → 0.228 moles of S₈

Ratio is 1:8, 1 mol of sulfur vapor can produce 8 moles of dioxide

Then, 0.228 moles of S₈ must produce (0.228 . 8) /1 =  1.82 moles

We convert the moles to g → 1.82 moles . 64.06 g /1mol = 116.5 g

3 0
3 years ago
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Answer:

A supersaturated solution made out of sugar and oil is crystallized on a surface suitable for crystal nucleation such as a stick.

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