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CaHeK987 [17]
3 years ago
9

Help please!!! How far is the barred-spiral galaxy from Earth?

Chemistry
1 answer:
mamaluj [8]3 years ago
3 0
Some are hundreds of Billions of miles away. Depends on which barred galaxy your talking about.
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How many significant figures<br> are in this number?<br> 43.55
leva [86]

Answer:

4 significant figures

Explanation:

Significant figures are the units/digits within a number that make the number more accurate and precise.

All digits (except for 0) are always significant. Therefore, all the digits in 43.55 are significant. Since there are 4 digits in the given number, there are 4 significant figures.

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1 year ago
3. The opening that allows light to enter the eye is the
xxMikexx [17]

Answer:

A)  Iris

Explanation:

The Iris controls the diameter of the opening in your eye, thus also controlling the amount of light let inside. It's also reponsible for the colour of you eye.

4 0
3 years ago
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How do you determine the volume of an irregular object if you don't know the density?
polet [3.4K]
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A sample of SO2 gas occupies 45.6 L at 373 K and 3.45 atm. This sample contains how many moles of oxygen atoms?
lisov135 [29]

Answer:

10.28 mol

Explanation:

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(atm x L) ÷ (0.0821 x K)

(3.45 x 45.6) ÷ (0.0821 x 373)

=5.13726

Then round it to significant figures

=5.14

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=10.28 mol O

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Answer:

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you can use p

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