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4 years ago

What is used to classify galaxies?star typesestimated agecolorshape

1 answer:

3 0

The correct answer among the choices given is the last option. Galaxies are classified according to their shapes or visual morphology. There three main types of galaxies currently. They are the elliptical, spiral and irregular. Elliptical galaxies are like a spheriod or an elongated sphere. Spiral galaxies are characterized and distinguished by having a bulge, a disk and a halo. Lastly, irregular galaxies do not have regular or symmetrical shape.

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A 230 g sample of a compound contains 136.6 g of carbon, 26.4 g of hydrogen, and 31.8 g of nitrogen. The rest is oxygen. What is

photoshop1234 [79]

If the total amount of the sample is 230g and they give each component of the sample, we add the given amount of grams of each element and subtract the given from 230g.

$136.6+26.4+31.8 = 194.8$
$230-194.8=35.2$

That means the rest of oxygen is 35.2g

This is Percent Composition.

The formula to find the percent composition of an element inside a compound is $\frac {MolarMass Of Element}{MolarMass Of Compound}*100$

Now we implement the variables into the formula to find the percent composition oxygen.

$\frac {35.2}{230} *100 =15.30$

The answer is 15.30% = O

7 0

3 years ago

Convert 19.2 moles to kL ??

noname [10]

Answer:

30.8994048km

Explanation:

19.2 mi * 1.609344 km/1mi = 30.8994048 km

A common question isHow many mile in 19.2 kilometer?And the answer is 11.930326891 mi in 19.2 km. Likewise the question how many kilometer in 19.2 mile has the answer of 30.8994048 km in 19.2 mi.

8 0

3 years ago

A chemist uses a standard solution of 0.210 M lithium hydroxide (LiOH) to titrate 28.10 mL of sulfurous acid acid (H2SO3), she f

erik [133]

Answer:

0.0827M of H₂SO₃

Explanation:

LiOH reacts with H₂SO₃ to produce water and Li₂SO₃, thus:

2LiOH + H₂SO₃ → 2H₂O + Li₂SO₃

Where 2 moles of lithium hydroxide react with 1 mole of sulfurous acid.

As the chemist requires 22.14mL = 0.02214L of a 0.210M solution to neutralize the acid, moles of LiOH are:

0.02214L × (0.210mol / L) =0.004649 moles of LiOH.

As 2 moles of LiOH react with 1 mole of H₂SO₃, moles of H₂SO₃ are:

0.004649 moles of LiOH ₓ (1 mole H₂SO₃ / 2 mol LiOH) =

0.002325 moles of H₂SO₃

These moles are present in 28.10mL = 0.02810L. Thus, molar concentration of the acid is:

0.002325 moles H₂SO₃ / 0.02810L = 0.0827M of H₂SO₃

3 0

3 years ago

Read 2 more answers

Balanced forces cannot accelerate an object True False

Zielflug [23.3K]

True Balance forces can not change the motion or direction of an object.

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3 years ago

Read 2 more answers

33.75 g of copper are reacted with 117.5 g silver nitrate. How much excess reactant would be unused or left over( in grams)?

Sophie [7]

Why don’t you just look it up

4 0

3 years ago