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3 years ago

Pls help it’s 8th grade science

Chemistry

1 answer:

maks197457 [2]3 years ago

6 0

Answer:

The Orange Man is moving quicker.

Explanation:

Energy is compounding which means that the orange man is going 1 m/s + 0.5 m/s or 1.5 m/s and the purple man is going 1 m/s - 0.5 m/s or 0.5 m/s

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What is the volume of 1.9 moles of chlorine gas (Cl2) at 298 K and 1.3 atm?

matrenka [14]

<h2>Hello!</h2>

The answer is:

The correct option is option C.

$V=36L$

To calculate the volume of the gas sample, we need to use the Ideal Gas Law, this equation is used to relate the pressure, the volume, the mass and the temperature of a gas, so, we can isolate the volume from it.

The Ideal Gas Law equation is equal to:

$PV=nRT$

Where,

P is the pressure (in atm)

V is the volume (in liter)

n is the mass of the gass (in mole)

T is the temperature of the gass (absolute temperature)

So, from the statement we know that:

$Pressure=1.3atm\\Temperature=298K\\n=1.9moles\\R=0.082057\frac{L.atm}{mol.K}$

Then, substituting and calculating we have:

$PV=nRT\\\\V=\frac{nRT}{P}=\frac{1.9moles*0.082057\frac{L.atm}{mol.K}*298K}{1.3atm}=35.74L$

Now, rounding to the nearest whol number we have that the volume is equal to 36 L.

Hence, the correct option is option C.

Have a nice day!

5 0

3 years ago

For which type of titration will the ph be basic at the equivalence point?

jeka94

A. Strong Acid vs. Strong Base

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3 years ago

How many moles are im 8.31x1023 molecules of h2so4

adelina 88 [10]

Answer:

1.38 mol.

Explanation:

It is known that every 1.0 mole of a molecule contains Avogadro's number of molecules (NA = 6.022 x 10²³).

<em><u>Using cross multiplication:</u></em>

1.0 mole of H₂SO₄ contains → 6.022 x 10²³ molecules.

??? moles of H₂SO₄ contains → 8.31 x 10²³ molecules.

<em>∴ The no. of moles in (8.31 x 10²³ molecules) of H₂SO₄ </em>= (1.0 mol)(8.31 x 10²³) / (6.022 x 10²³ molecules) = <em>1.38 mol.</em>

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3 years ago

While exploring on your grandfathers farm, you find a layer of charcoal that might represent a campfire built by Native American

Ierofanga [76]

Carbon Dating would tell you the age of the charcoal

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3 years ago

How many moles are there in 36.0g of Beryllium

Alja [10]

Answer:

4.00 mol

Explanation:

$\frac{36.0g Be }{1} *\frac{1 mol}{9.0122 g}$ = 3.994585118 mol

(If you round Be mass to 9 you get 4 mol)

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3 years ago