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3 years ago

Which of these is not an example of a molecule?

Chemistry

1 answer:

r-ruslan [8.4K]3 years ago

5 0

Answer:

Explanation:

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1.) A balloon contains 0.126 mol of gas and has a volume of 2.74 L .

Ann [662]

Answer:

<u></u>

<u>Problem 1: 5.44L</u>

<u>Problem 2: 479mL</u>

Explanation:

<h2>Problem 1. </h2>

n₁ = 0.126 mol
V₁ = 2.74 L
n₂ = 0.126mol + 0.124mol
V₂ = ?
Conditions: constant temperature and pressure

<u>b) Physical principles:</u>

The volume occupied by a gas, when the temperature and pressure remain unchanged, is proportional to the number of moles of gas.

$\dfrac{n_1}{V_1}=\dfrac{n_2}{V_2}$

<u>c) Solution:</u>

Solve for V₂ , substitute and compute:

$V_2=n_2\times\dfrac{V_1}{n_1}\\ \\\\ V_2=(0.126mol+0.124 mol)\times \dfrac{2.74L}{0.126mol}\\ \\ \\ V_2=5.44L$

<h2>Problem 2.</h2>

n₁ = 0.547mol
V₁ = 295 mL
V₂ = ?
n₂ = 0.547mol + 0.342 mol
Conditions: constant temperature and pressure

<u>b) Physical principles:</u>

The same as above: the volume occupied by a gas, when the temperature and pressure remain unchanged, is proportional to the number of moles of gas.

$\dfrac{n_1}{V_1}=\dfrac{n_2}{V_2}$

<u>c) Solution:</u>

Solve for V₂ , substitute and compute:

$V_2=n_2\times\dfrac{V_1}{n_1}\\ \\\\ V_2=(0.547mol+0.342 mol)\times \dfrac{295mL}{0.547mol}\\ \\ \\ V_2=479mL$

4 0

3 years ago

What stage in the cell cycle does the DNA duplicate?

Marizza181 [45]

Answer: 1. Interphase

3 0

2 years ago

Read 2 more answers

A 1000-ml bag of d5w 1/2 ns is to infuse over 8 hours. what is the flow rate of the infusion?

AlladinOne [14]

1542 is the answer. : )

7 0

3 years ago

NaCl + H2SO4 ---> Na2SO4 + HCl<br> Balance the double replacement chemical reaction.

VikaD [51]

Answer:

2NaCl+H2SO4-->Na2SO4+2HCl

Explanation:

There are two Na on the right, so put a 2 in front of NaCl on the left. This makes 3 Cl also, so put a 2 in front of HCl on the right. There are already 2 H on the left, so the equation is balanced.

7 0

3 years ago

I NEED HELP PLEASE,THANKS!

Yakvenalex [24]

Answer:

Covalent bonding

Explanation:

In covalent bonding, the electrons are shared to fill the octet rule (8 electrons in valence shell). CCl4 tends to do covalent bonding because the the 4 valence electrons are Carbon are shared with the Chlorine atoms so that each chlorine atom has a full octet and chlorine shares its electrons to fill the octet of carbon.

Also, since carbon and chlorine are both non-metal, non-metal things exhibit covalent bonding thus this is covalent bonding as well. Ionic boding is for metal and non metal pair where electrons are transferrred, in our case, electrons are shared, they are not transferred.

6 0

3 years ago