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Phoenix [80]
3 years ago
13

A scientist placed an air-filled ballon into a freezer and observes that the ballon shrinks.which best explains why this happens

?
Chemistry
1 answer:
bogdanovich [222]3 years ago
8 0
The frozen balloon shrank because the average kinetic energy of the air molecules in a balloon decreases when the temperature decreases. This makes the molecules move more slowly and have less frequent and weaker collisions with the inside wall of the balloon, which causes the balloon to shrink a little. This can be called contraction.
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A solution is prepared by dissolving 15.0 g of NH3 in 250.0 g of water. The density of the resulting solution is 0.974 g/mL. The
iVinArrow [24]

Answer:

[NH₃]  → 3.24 M  

Explanation:

Our solute: Ammonia

Our solvent: Water

Solution's mass = Mass of solute + Mass of solvent

Solution's mass = 15 g + 250 g = 265g

We use density to determine, the volume.

D = mass /volume → Volume = m / D →  265 g /0.974 g/mL = 272.07 mL.

We convert the mL to L → 272.07 mL . 1L /1000mL = 0.27207 L

To determine molarity we need the moles of solute in 1 L of solution.

Moles of solute are: 15g / 17g/mol = 0.882 moles

[NH₃] = 0.882mol /0.27207 L → 3.24 M  

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g To recover the copper from solution a small amount of zinc is placed into solution, producing copper metal and zinc ions in so
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3 years ago
How many moles are .20 Grams silver sulfate​
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Answer:

0.2  grams

Explanation:

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3 years ago
How many ligaments in e kne
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Which of the following describes a covalent bond?
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I think it is C, because a covalent bond is a distribution of 2 atoms to 1 electron, meaning they are sharing and not exchanging, and the electronegravity would be above 1.7

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