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Marrrta [24]
3 years ago
5

In what month does winter begin in the southern hemisphere

Chemistry
2 answers:
Katyanochek1 [597]3 years ago
7 0

In the Southern Hemisphere this would be around June 20 and culminates on September 22.

ruslelena [56]3 years ago
3 0

Winter begins in June and ends in September

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Consider a balloon that has a volume V. It contains n moles of gas, it has an internal pressure of P, and its temperature is T.
Dmitry [639]
B.) it stays the same
6 0
3 years ago
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No uso dos cosméticos, as embalagens representam uma ferramenta de comunicação extremamente importante e que segue uma legislaçã
stich3 [128]

Answer:

Het spijt me dat ik het niet weet ??

8 0
3 years ago
What is the volume of a salt crystal measuring 1.64 x 10^-2m by 1.5 x 10^-2m by 4.8 x 10^-3
lubasha [3.4K]

Answer:

V = 1.2 × 10⁻⁶ m³

Explanation:

Volume is equal to length × width × height, since we are given these measurements in the question we can simply plug our numbers into the formula.

V = l × w × h

V = 1.64 x 10⁻² × 1.5 x 10⁻² × 4.8 x 10⁻³

V = 1.2 × 10⁻⁶ m³

5 0
4 years ago
How many moles are in 38 grams of Argon? Round to 2 decimal places. Use "e" for exponents
yuradex [85]

Answer: 39.948

Explanation:

How many grams Argon in 1 mol? The answer is 39.948. We assume you are converting between grams Argon and mole. You can view more details on each measurement unit: molecular weight of Argon or mol The molecular formula for Argon is Ar.

3 0
3 years ago
How many acetone molecules are in a bottle of acetone with a volume of 445 mL ? (density of acetone = 0.788 g/cm3).
Mkey [24]
<h2>Hello!</h2>

The answer is: 3.63x10^{24}particles

<h2>Why?</h2>

First, we need to calculate the molecular weight of the acetone (CH3COCH3)

So,

C=12.011g/mol\\O=15.99g/mol\\H=1.008g/mol

Then,

CH3COCH3=12.011+(1.008)*3+12.011+15.999+12.011+(1.008)*3=58.08g/mol

Second, we need to calculate the mass of the acetone in the bottle

We need to remember that 1cm^{3}=1mL

So,

445cm^{3}*\frac{0.788g}{cm^{3}}=350.66g

Third, we need to calculate the number of moles:

350.66g*\frac{1mol}{58.08g}=6.03moles

Fourth, we need to calculate the number of atoms:

Remember, 1 mol=6.022x10^{23}particles

Therefore,

6.03moles*\frac{6.022x10^{23}particles }{1mol}=3.63x10^{24}particles

Have a nice day!

4 0
4 years ago
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