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Rina8888 [55]
2 years ago
14

What do astronomers use to calculate the age of the universe? Check all that apply. dark energy the age of rocks on Earth the ag

e of the oldest stars patterns of background radiation how fast distant galaxies are moving away from us
Chemistry
2 answers:
Hitman42 [59]2 years ago
4 0

The answers are:

The age of the oldest stars

How fast distant galaxies are moving away from us

Patterns of background radiation

Using these techniques, and using the Big Bang as reference point, astronomers estimate that the universe may be approximately 12 billion years old.


Likurg_2 [28]2 years ago
4 0

the age of the oldest stars

patterns of background radiation

how fast distant galaxies are moving away from us

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Answer:

9.94 mL, the volume of ethanol needed

Explanation:

The reaction is:

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We convert the mass of the formed product to moles:

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Therefore, 0.341 moles of CO₂ must be produced by (0.341. 1) / 2 = 0.1705 moles of alcohol.

We convert the moles to mass, and then, the mass to volume by the use of density.

0.1705 mol . 46 g / 1 mol = 7.84 g of ethanol

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9.94 mL

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2 years ago
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Answer:

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