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Katarina [22]
4 years ago
6

How does a scientist make two solutions with the same molarity? A By dissolving the maximum amount of each substance in the B. B

y dissolving the same number of grams of each substance in the OC. By dissolving 1 mole of each substance in enough water to make same volume of water same volume of water sure dissolving is complete By dissolving the same number of nmoles of each substance in the same volume of water OD.​
Chemistry
1 answer:
aalyn [17]4 years ago
7 0

Answer: The answer is “ By dissolving the same number of nmoles of each substance in the same volume of water ”

Explanation:

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In order to transfer liquid we need

a) a funnel: an apparatus which transfers liquid from one glassware to other (of narrow mouth) without spilling

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4 years ago
CH, (g) + 20 (g) → CO(g) + 2H 0(g)
galben [10]
<h3>Answer:</h3>

126.14 g

<h3>Explanation:</h3>
  • Complete combustion of hydrocarbons yields water and carbon dioxide.
  • Methane is a hydrocarbon in the homologous series known as alkanes.
  • Methane undergoes combustion in air to produce water and carbon dioxide according to the equation below.

CH₄ (g) + 2O₂ (g) → CO₂(g) + 2H₂O(g)

<u>We are given;</u>

  • 3.5 moles of Methane

We are required to determine the mass of H₂O produced

<h3>Step 1: Moles of H₂O produced</h3>
  • From the equation 1 mole of methane undergoes combustion to produce 2 mole of H₂O.

Therefore, Moles of methane = Moles of H₂O × 2

Hence, Moles of H₂O = 7.0 moles

<h3>Step 2: Mass of H₂O produced </h3>

We know that; mass = Moles × Molar mass

Molar mass of water = 18.02 g/mol

Therefore;

Mass of water = 7.0 moles × 18.02 g/mol

                       = 126.14 g

Thus, the mass of water produced is 126.14 g

6 0
4 years ago
For a substance to change phases, the amount of internal energy must change. Water exists in three phases: liquid, solid (ice),
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Answer:

Solid, liquid, gas

Explanation:

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