1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kobusy [5.1K]
3 years ago
7

The molecular weight of a gas that has a density of 5.75 g/l at stp is __________ g/mol.

Chemistry
2 answers:
Ira Lisetskai [31]3 years ago
8 0

Answer : The molecular weight of a gas is, 128.9 g/mole

Explanation : Given,

Density of a gas = 5.75 g/L

First we have to calculate the moles of gas.

At STP,

As, 22.4 liter volume of gas present in 1 mole of gas

So, 1 liter volume of gas present in \frac{1}{22.4}=0.0446 mole of gas

Now we have to calculate the molecular weight of a gas.

Formula used :

\text{Moles of gas}=\frac{\text{Mass of a gas}}{\text{Molecular weight of a gas}}

Now put all the given values in this formula, we get the molecular weight of a gas.

0.0446mole=\frac{5.75g}{\text{Molecular weight of a gas}}

\text{Molecular weight of a gas}=128.9g/mole

Therefore, the molecular weight of a gas is, 128.9 g/mole

Reil [10]3 years ago
4 0

128.8 g/mole.

<h3>Further explanation</h3>

<u>Given:</u>

Density of a gas = 5.75 g/l at STP

<u>Question:</u>

The molecular weight of this gas (in g/mol)

<u>The Process:</u>

This is a stoichiometric calculation.We will find out the molecular weight (or molar mass) of the gas measured at STP with known density.

Remember at STP 1 mole of gas = 22.4 L or referred to as a molar volume.

From the value of the gas density, we know that 1 L of gas has a mass of 5.75 g.

  • Volume of gas = 1 L
  • Mass of gas = 5.75 g
  • Molar volume = 22.4 L/mole

The relationship between the mole (n), mass (m), molecular weight (M), volume (V), and molar volume (Vm) is as follows:

\boxed{ \ n = \frac{V}{V_m} \ } \ and \ \boxed{ \ n = \frac{mass}{molecular \ weight} \ } \rightarrow \boxed{\boxed{ \ \frac{mass}{molecular \ weight} = \frac{V}{V_m} \ }}

Let us calculate the molecular weight.

\boxed{ \ \frac{m}{M} = \frac{V}{V_m} \ }

\boxed{ \ M = \frac{m \times V_m}{V} \ }

\boxed{ \ M = \frac{5.75 \times 22.4}{1} \ }

\boxed{\boxed{ \ M = 128.8 \ }}

Thus the molecular weight of a gas that has a density of 5.75 g/L at STP equal to 128.8 g/mole.

- - - - - - - - - -

Notes:

  • STP (in chemistry) is the abbreviation for Standard Temperature and Pressure, i.e., 273 K (0° Celsius or 32° Fahrenheit) and 1 atm.
  • Remember the mole number of a substance can be found via mass, volume, or number of particles.
<h3>Learn more</h3>
  1. At STP, what is the volume of nitrogen gas?  brainly.com/question/4294791  
  2. Conservation of mass brainly.com/question/9473007  
  3. What is the formula for the hydrate? brainly.com/question/13012523
You might be interested in
What volume of 0.160 m li2s solution is required to completely react with 130 ml of 0.160 m co no3 2?
Over [174]
The  volume  of  0.160    m   Li2S  solution  required  to  completely  react  with  130 ml  of 0.160  CO(NO3)2  is calculated   as  below

write the  reacting  equation

Co(NO3)2 +  Li2S = 2LiNO3  +  COS

find the    moles  of CO(NO3)2  = molarity  x  volume

=  130 ml  x  0.160=20.8  moles

since the reacting moles between CO(NO3)2  to LiS  is   1:1  the  moles of LiS  is  also  20.8  moles

volume  of Lis  is  therefore =  moles of Lis/ molarity  of LiS

=  20.8/0.160 =  130 Ml
3 0
3 years ago
Which of these is an example of matter?
wolverine [178]

Answer:

Air

Explanation:

It takes up space/ the rest do not

7 0
3 years ago
Read 2 more answers
I need help FAST ASAP
kiruha [24]
In this item, we are simply to find the ions that may bond and are able to form a formula unit. We are also instructed to give out their name. There are numerous possible combinations of ions to form a compound. Some answers are given in the list below.

1.  Na⁺     ,    Cl⁻    , NaCl   ---> sodium chloride (this is most commonly known as table salt)

2. C⁴⁺       , O²⁻     , CO₂  ---> carbon dioxide

3. Al³+     , Cl⁻       , AlCl₃   ----> aluminum chloride

4. Ca²⁺     , Cl⁻     , CaCl₂    ---> calcium chloride

5. Li⁺        , Br⁻      , LiBr       ---> lithium bromide

6. Mg³⁺     , O²⁻      , Mg₂O₃   ----> magnesium oxide

7. K⁺        , I⁻          , KI   ---> potassium iodide

8. H⁺        , Cl⁻        , HCl  --> hydrogen chloride

9. H⁺        , Br⁻         , HBr ----> hydrogen bromide

10. Na⁺    , Br⁻         , NaBr   ---> sodium bromide
6 0
4 years ago
Chemistry
Aleks [24]

Answer:

A. High electrical conductivity

Explanation:

solid silver isn't brittle, it has a high melting point, and its not a good insulator.

4 0
3 years ago
Dinitrogen trisulfide symbol
notka56 [123]
The symbol for dinitrogen trisulfide is N2S3
4 0
3 years ago
Read 2 more answers
Other questions:
  • Balanced equation for this?<br><br> ___ HBr + ___ KHCO3  ___ H2O + ___ KBr + ___ CO2
    12·1 answer
  • Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li(s) + N2(g) → 2Li3N(s) How many moles of lit
    11·2 answers
  • What is difference between primary and standard solution?
    14·1 answer
  • Describe in detail what happens when the following are dissolved in water polar solute ch3oh vs nonpolar solute ch3(ch2)4ch3
    13·1 answer
  • Determine from the balanced chemical reaction if
    13·1 answer
  • What solutes are soluble in water?
    11·1 answer
  • In complete sentences, describe the behavior of a substance in each state of matter if placed in a closed container
    14·1 answer
  • Interconic attraction theory states what​
    12·1 answer
  • What is the Lewis dot diagram of ca and br?
    8·1 answer
  • Explain how potential energy and kinetic energy are transformed in a roller coaster.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!