2.00 g of an unknown gas at STP fills a 500. mL flask. What is the molar mass of the gas?

Answers

Answer 1

The molar mass of the unknown gas in the 500 mL flask at stp is 89.7 g/mol

We'll begin by calculating the number of mole of the gas that occupied 500 mL at stp.

Recall at stp:

22400 mL = 1 mole of the gas

Therefore,

500 mL = 500 / 22400 = 0.0223 mole of gas.

Finally, we shall determine the molar mass of the gas. This can be obtained as follow:

Mass of gas = 2 g

Mole of gas = 0.0223 mole

Molar mass of gas =?

Molar mass = mass / mole

Molar mass of gas = 2 / 0.0223

Molar mass of gas = 89.7 g/mol

Therefore, the molar mass of the unknown gas is 89.7 g/mol

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Related Questions

please help 10 points asap​

Answers

Answer:

opposite

Explanation:

Answer:

opposite

Explanation:

cu9c9ucoucucpucfpufupfpucupvpjvpucu

10 The rate of the reaction between hemoglobin (Hb)
and carbon monoxide (CO) was studied at 20°C.
The following data were collected with all
concentration units in u mol/L. (A hemoglobin
concentration of 2.21 u mol/L is equal to
2.21 x 10 mol/L.)
[Hblo [CO),
Initial Rate
(u mol/L) (u mol/L) (u mol/Ls)
2.21
1.00
0.619
4.42
1.00
1.24
4.42
3.00
3.71
(a) Determine the orders of this reaction with
respect to Hb and CO.
(b) Determine the rate law.
(c) Calculate the value of the rate constant.
(d) What would be the initial rate for an
experiment with [Hb]o =3.36 u mol/L
[CO] =2.40 4 mol/L?​

Answers

Answer:cookie

Explanation:

Which letter? Thanks in advance!

Answers

Answer: b

Explanation:

20 POINTS
What is true about the Sun, light bulbs, and flames?

AThey are all made of fire.
BThey are all made by people.
CThey are all found in nature.
DThey are all sources of light energy.

Answers

Answer:

D

Explanation:

Light blubs are not made of fire.

The sun wasnt made by humans.

You cant find Light bulbs in nature.

Meaning it is D.

A chemical equation is shown:
Al + O2 A1203
According to the law of conservation of mass, how many atoms of oxygen exist in the products of this reaction?
6
5
3
2

Answers

Answer:

Well the answer of 1 and 3 is WRONG based on the 1 star review and the answer of 3 is wrong too I just took a test with this question.

Explanation:

Sorry...

Answer:

it's 6

Explanation:

I just took the test and got it right

Does water take up space (have volume)? Yes or no

Answers

Answer:

Yes

Explanation:

How and why was the periodic table set up?

Answers

in a series of columns, or groups, and rows, or periods.
The person above me is 100% correct!!

Calculate the volume of a liquid with a density of 5.45 g/mL and a mass of 65 g.

Answers

Answer:

The answer is 11.93 mL

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\ [/tex]

From the question we have

[tex]volume = \frac{65}{5.45} \\ = 11.926605...[/tex]

We have the final answer as

11.93 mL

Hope this helps you

A scientist who collects and analyzes DNA from a crime scene is a

Answers

Answer:

forensic scientist

Explanation:

forensic science is the discipline in which professionals use scientific means to analyze physical crime evidence. this evidence is then presented in court in order to help determine the innocence or guilt of a specific suspect.

Answer:

Its a forensic scientist :D

Explanation:

I took a test and got it wrong but it showed the right answer and its a forensic scientist

(don't ask how i got it wrong i was rushing!!)

A rock with a mass of 70 grams is dropped into a graduated cylinder with 30 mL of water in it. The water level rose to 35 mL calculate the density of the rock in g/mL

Answers

Answer:

14

Explanation:

70g/(35mL-30mL)=14g/mL

If a rock with a mass of 70 grams is dropped into a graduated cylinder with 30 milliliter of water in it. The water level rose to 35 milliliters, then the density of the rock in gram / milliliter would be  14  gram / milliliter.

What is density?

It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.

The mass of ṭhe rock = 70 grams

The volume of the rock = 35 milliliters - 30 milliliters

                                       = 5 milliliters

The density of the rock = mass of the rock / volume of the rock

                                       =70 grams / 5 milliliters

                                       = 14  gram / milliliter

Thus, the density of the rock would be 14 gram / milliliter.

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#SPJ2

Solid nickel reacts with aqueous lead (II) nitrate to form solid lead. What is the net ionic equation for this reaction? • Hint: In this reaction, nickel exhibits its most common oxidation state of +2. • Be sure to include the charge for each ion in the net ionic equation. Provide your answer below: (s) + (aq) → *(n)

Answers

Answer:

Pb²⁺(aq) --> Ni²⁺(aq)

Explanation:

The equation of the reaction is given as;

Ni(s) + Pb(NO₃)₂(aq) --> Pb(s) + Ni(NO₃)₂(aq)

In writing the ionic equation, we break the aqueous compound into ions. The solid and liquid compounds are ignored.

We have;

Pb²⁺(aq)  + NO₃²⁻(aq) -->  Ni²⁺(aq)  + NO₃²⁻(aq)

Canceling the spectator ions;

Pb²⁺(aq) --> Ni²⁺(aq)

Answer:

Ni(s)+Pb2+(aq)→Ni2+(aq)+Pb(s)

Explanation:

The complete ionic equation of this reaction is

Ni(s)+Pb2+(aq)+2 NO−3(aq)→Ni2+(aq)+2 NO−3(aq)+Pb(s)

The nitrate ions are spectator ions and can be removed from the equation, giving us

Ni(s)+Pb2+(aq)→Ni2+(aq)+Pb(s)

how many molecules of HCI would react with 1 mol of MgO? ​

Answers

Answer:

C.

Explanation:

MoleculesHcl = (1 molMgO/1)(2molHCL/1molMGO)(6.02x10^23/1molHCL) = 1.204x10^24

A 7.28 g sample of chromium metal was heated to produce chromium oxide. The weight of the compound was 10.63 g. What is the percent chromium in this compound?

Answers

Answer:

68.48%

Explanation:

The percent mass of an element in a compound tells us about the amount of such element contributed to the total compound.

In this case, 7.28 g sample of chromium metal was heated to produce chromium oxide with weight of 10.63 g. The percent mass of chromium in chromium oxide can be calculated by using the formula:

%mass of Cr = mass of Cr/mass of Chromium oxide × 100%

%mass of Cr = 7.28/10.63 × 100

%mass of Cr = 0.6848 × 100

%mass of Cr = 68.48%

I need the answer to this multiple-choice

Answers

C
the number of protons is equal to the atomic number

substance in which two or more atoms are bonded together.

Answers

molecule(s)

two or more atoms touching means they are connected as molecules which also make up compounds

PLEASE HELP!! I WILL MARK THE 1st ONE BRAINLIEST!

Answers

Answer:

A is not true.

Blue waves have ~500 nm and Orange waves have ~625 nm

a is not true that’s all I can say

Student places the ends of the wires The piece of iron shown in the picture which Physical property of iron is being tested in this picture

A. Thermal conductivity
B. Ductility
C. Electrical conductivity
D. Magnetism

Answers

Answer: C

Explanation:

Electrical conductivity

Which can not be chemically broken down into simpler substances

Answers

Uh...... elements????

What are the REDOX and BALANCED EQUATION for:

Aluminum metal and aqueous hydrochloric acid (HCl) will form Aqueous aluminum chloride and hydrogen Gas

Hydrogen peroxide (H2O2) will decompose to hydrogen and oxygen gas

Answers

H66 I think oxygen it was that is

Can someone help please

Answers

can gain electrons in its outermost shell

In addition to how much force Earth exerts on the object, which features of an object affect its weight? edginuity

Answers

Answer:A

Explanation:

In the reaction of: ????2O4 (g) ⇌ 2????O2(g) If the equilibrium constant is Kc = 0.513 and the initial concentration of ????2O4 = 0.0500 ????. What are the equilibrium concentrations of ????2O4 and ????O2 under these conditions?

Answers

Answer:

[N₂O₄] = 0.00411 M

[NO₂] = 0.0918 M

Explanation:

In the reaction of: N₂O₄(g) ⇌ 2 NO₂(g) If the equilibrium constant is Kc = 0.513 and the initial concentration of N₂O₄ = 0.0500 M. What are the equilibrium concentrations of N₂O₄ and NO₂ under these conditions?

Step 1: Given data

Initial concentration of N₂O₄: 0.0500 M

Equilibrium constant (Kc): 0.513

Step 2: Make an ICE chart

        N₂O₄(g) ⇌ 2 NO₂(g)

I        0.0500           0

C           -x              +2x

E      0.0500-x        2x

Step 3: Find the value of "x"

The equilibrium constant is:

Kc = [NO₂]² / [N₂O₄]

0.513 = (2x)² / (0.0500-x)

4x² + 0.513 x -0.02565

We solve for x and we get x₁ = 0.0458942 and x₂ = −0.558894 (neglected).

Step 4: Calculate the concentrations at equilibrium

[N₂O₄] = 0.0500-x = 0.00411 M

[NO₂] = 2x = 0.0918 M

Please help I need a answer to both

Answers

Hi , I’m really sorry because I just have the first question... so here it is :

So it is 0.52 mol .

Have a nice day .

What is the volume in liters of 222 g of neon if neon has a density of 0.900 g/L?

Answers

Answer:

[tex]V=247L[/tex]

Explanation:

Hello there!

In this case, since the density is defined as the degree of compactness of a substance and is computed by diving the mass over the volume it occupies:

[tex]\rho =\frac{m}{V}[/tex]

Given the density and the mass of the neon, we can compute its density as shown below:

[tex]V=\frac{m}{\rho} =\frac{222g}{0.900g/L}\\\\V=247L[/tex]

Best regards!

The volume of neon in liters is 246.67 L.

To calculate the volume of neon, we use the formula below.

Formula:

D = m/V............... Equation 1

Where:

D = Density of neonm = mass of neonV = Volume of neon.

make V the subject of the equation.

V = m/D............... Equation 2

From the question,

Given:

m = 222 gD = 0.900 g/L

Substitute these values into equation 2

V = 222/0.9V = 246.67 L.

Hence, The volume of neon in liters is 246.67 L.

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What type of compound is disulfur dichloride?
a. organic compound
b. acid (ionic compound)
c. covalent compound
d. ionic compound

Answers

Answer:

Covalent compound

Explanation:

It is formed by covalent bonds, in which the atoms share a pair of valence electrons

What are the products of photosynthesis

Answers

Answer:Glucose, Oxygen and Water

Explanation:

Answer:

Hello i have don this... : )

Explanation:

It is oxygen and glucose

Have a good day im 100% sure this is... i forgot but it is before or after the asexual and sexual lessons

I added a meme for no reason you will only get it if you have read heroes of Olympus

A sample from one of Earth's oceans has a salinity of 34. What is the concentration of dissolved salts in this sample of seawater when expressed in ppmppm

Answers

Answer:

Concentration of dissolved salts = 34,038.76 ppm

Explanation:

Given:

Salinity of ocean water = 34

Find:

Concentration of dissolved salts

Computation:

Salinity of ocean water = 34 g/l

1g/l = 1001.14 ppm

Concentration of dissolved salts = 1001.14 ppm x 34

Concentration of dissolved salts = 34,038.76 ppm

A mystery element "X” has two stable isotopes X-50 which occurs 40% of the time
and X-60 which occurs 60% of the time. What is the average mass of element "X"?

A-50 amu
B-54 amu
C-56 amu
D-60 amu

Answers

Answer:

probaly C

Explanation:

I'm not sure on this one...

A resistor is placed in a circuit. The voltage of the circuit is changed and the current is measured. The graph seen here shows the data that was collected. Determine the resistance of the resistor in this circuit.

Answers

answer- 2 Ohms

explain- i took the test!

how are ionic bonds and covalent bonds different

Answers

Ionic bonds result from transfer of electrons, whereas covalent bonds are formed by sharing
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