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3 years ago

Air is transparent material?

Chemistry

2 answers:

Andrew [12]3 years ago

6 0

Air is a transparent material yes, we can see through it

Firlakuza [10]3 years ago

4 0

Yes, air is transparent because air<span> contains so few atoms, light waves run into very few of them when they shine through </span>air<span>. So the </span>air<span> looks </span>transparent<span>.

Hope this Helps!</span>

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This is actually science but anyways my teacher didn't explain much can someone help?

zepelin [54]

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5 0

3 years ago

What mass in grams of MgSO4 is required to make 59.3 mL of 2.68 M<br> solution?

love history [14]

Answer:

Approximately $19.1\; \rm g$ .

Explanation:

<h3>Number of moles of formula units of magnesium sulfate required to make the solution</h3>

The unit of concentration in this question is " $\rm M$ ". That's equivalent to " $\rm mol \cdot L^{-1}$ " (moles per liter.) In other words:

$c(\mathrm{MgSO_4}) = 2.68\; \rm M = 2.68\; \rm mol \cdot L^{-1}$ .

However, the unit of the volume of this solution is in milliliters. Convert that unit to liters:

$\displaystyle V = 59.3\; \rm mL = 59.3 \; \rm mL \times \frac{1\; \rm L}{1000\; \rm mL} = 0.0593\; \rm L$ .

Calculate the number of moles of $\rm MgSO_4$ formula units required to make this solution:

$\begin{aligned}n(\rm MgSO_4) &= c \cdot V \\ &= 2.68 \; \rm mol \cdot L^{-1} \times 0.0593\; \rm L \approx 0.159\; \rm mol \end{aligned}$ .

<h3>Mass of magnesium sulfate in the solution</h3>

Look up the relative atomic mass data of $\rm Mg$ , $\rm S$ , and $\rm O$ on a modern periodic table:

$\rm Mg$ : $24.305$ .
$\rm S$ : $\rm 32.06$ .
$\rm O$ : $15.999$ .

Calculate the formula mass of $\rm MgSO_4$ using these values:

$M(\mathrm{MgSO_4}) = 24.305 + 32.06 + 4 \times 15.999 \approx 120.361\; \rm g \cdot mol^{-1}$ .

Using this formula mass, calculate the mass of that (approximately) $0.159\; \rm mol$ of $\rm MgSO_4$ formula units:

$\begin{aligned}m(\mathrm{MgSO_4}) &= n \cdot M \\&\approx 0.159 \; \rm mol \times 120.361 \; \rm g \cdot mol^{-1} \approx 19.1\; \rm g\end{aligned}$ .

Therefore, the mass of $\rm MgSO_4$ required to make this solution would be approximately $19.1\; \rm g$ .

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3 years ago

Madrid vs balonay soccor team why is Madrid better can u like compare it and Ik it say science and this rly is science my teache

nignag [31]

Eh I can't comment

That's y

No-one knows that I enter this site

Only a cousin knows

Cz I've got a protective family lol

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3 years ago

PLEASE HELP!! 15 POINTS!!

Arada [10]

Q, R, S, P is the order of apparent magnitude of the stars, starting from the least to the greatest.

Answer: Q, R, S, P

<u>Explanation:</u>

The apparent magnitudes of the star is the brightness calculated by an observer at a particular distance from the Earth. The smaller the distance between the star and the Earth, the greater the apparent brightness.

So , from the given distance (in light years), Q,R,S,P is the answer (least to the greatest apparent magnitude) (distance is greatest to least).

7 0

3 years ago

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(true or false) the electron structure of an atom is determined by direct observation using x-rays.

Mama L [17]

The answer is false. It is because the electron structure of the atom is not determined by using the direct observation of using an x-ray but rather the usage of theoretical modeling and the emission spectra will be useful in observing.

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3 years ago