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balu736 [363]
3 years ago
6

A 1.20-L container contains 1.10 g of an unknown gas at STP. What is the molecular weight of the unknown gas?

Chemistry
1 answer:
SOVA2 [1]3 years ago
8 0

Answer:

M = 20.5 g/mol

Explanation:

Given data:

Volume of gas = 1.20 L

Mass of gas = 1.10 g

Temperature and pressure = standard

Solution:

First of all we will calculate the density.

Formula:

d = mass/ volume

d = 1.10 g/ 1.20 L

d = 0.92 g/L

Now we will calculate the molar  mass.

d = PM/RT

0.92 g/L = 1 atm × M / 0.0821 atm.L/mol.K ×273.15 K

M =  0.92 g/L × 0.0821 atm.L/mol.K ×273.15 K /  1 atm

M = 20.5 g/mol

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What happens when sodium and sulfur combine
german

Answer:

It emits hydrogen sulfide...smells like rotten eggs..

ty:)pls let me know whether this is ryt:D

6 0
3 years ago
Read 2 more answers
Which unstable element is used to determine the age of volcanic rock?
77julia77 [94]

<em><u>Answer:</u></em>

Potassium.

<u><em>Explanation:</em></u>

Therefore, the answer is Potassium. You might think, that because we were talking about Argon as well, the answer is both of them, but no. Everything starts with Potassium but it decays into Argon during the process.

6 0
3 years ago
Read 2 more answers
Hydrocarbons, compounds containing only carbon and hydrogen, are important in fuels. The heat of combustion of cyclobutane, C4H8
Gennadij [26K]

Answer:

1. C4H8 + 6O2  -----> 4CO2 + 4H20

2. 3836.77 kcal

Explanation:

1. Balanced equation for the complete combustion of cyclobutane:

C4H8 + 6O2  -----> 4CO2 + 4H20

2. Heat of combustion of cyclobutane = 650.3 kcal/mol

    Molecular weight of cyclobutane, C4H8 = 56.1 g/mol

   Mole of C4H8 : mass of cyclobutane/Molecular weight of cyclobutane

  Mole of C4H8 = 331/56.1 = 5.9 mol

Energy released during combustion =  5.9 mol × 650.3 kcal/mol = 3836.77kcal

Therefore the energythat  is released during the complete combustion of 331 grams of cyclobutane is 3836.77kcal

8 0
3 years ago
Please help! Will mark Brainliest!
sergey [27]

C) H2O has the strongest dipole interactions

Explanation:

The dipole interactions are the interactions that occur between polar molecules.

Polar molecules form when the atoms forming the molecule have different electronegativity, therefore one of the atom in the molecule attract the shared electrons more towards itself; as a result, the molecule ends up having a region which is slightly negatively charged and a region slightly positively charged.

In this problem, we are comparing 4 different molecules. We observe that:

H2: this molecule is formed by 2 atoms of hydrogen - since the two atoms are identical, electrons are equally shared between the two atoms, so this molecule is not polar

O2: this molecule is formed by 2 identical atoms of oxygen, so it is not polar, for the same reason as H2

CH4: this molecule consists of a carbon atom surrounded by 4 hydrogen atoms - since this molecule has a symmetric structure, the charge is balanced, therefore this molecule is not polar

H2O (water): the oxygen atom in the water molecule is more electronegative than the hydrogens, therefore it tends to attract more the shared electrons - as a result, the molecule is polar.

Therefore, the correct answer is H2O.

Learn more about atoms and molecules:

brainly.com/question/2757829

#LearnwithBrainly

3 0
3 years ago
Please please please please help
Pavel [41]

Answer:

Atomic #: 82

Mass #: 206

Charge: 4+

# of protons: 82

# of electrons: 78

# of neutrons: 124

Explanation:

Atomic #: look at the bottom left #, it's always the atomic #.

Mass #: look at the top left # it's always the mass #.

Charge: they give you the charge which is shown on the upper right of the element.

# of protons: is the atomic #

# of electrons: also the atomic # minus 4 bc the charge is a positive 4, indicating that some electrons 'left'.

# of neutrons: 206 (mass # is protons + neutrons) minus 82 (atomic#) which is 124.

6 0
3 years ago
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