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
Nadya [2.5K]
3 years ago
14

Co(g) + 2 h2 --> ch3oh 2.50 g of hydrogen is reacted with 30.0 l of carbon monoxide at stp. 1. what is the limiting reactant?

*hint: only list the element symbol* 2. what mass of ch3oh is produced? *hint: only list the grams* 3. how much excess is left over? *hint: only list the grams*
Chemistry
2 answers:
Lemur [1.5K]3 years ago
7 0
CO(g) +2H2--->CH3OH
2.50g H2*1mol/2g=1.25 mol H2
30.0L CO*1mol/22.4L=1.34 mol CO,
according to reaction 1 mol CO needs 2 mol H2,so 1.34 mol CO need 2.68 mol H2, so 1) limiting teactant is H2 (H)

2)1.25 mol CH3OH will be produced, 1.25 mol*32g/mol=40.0 g CH3OH
3) 1.25 mol H2 needs 0.625 g CO
1.34-0.625=0.715 g CO leftover

anastassius [24]3 years ago
7 0

Answer 1 : The limiting reactant is, hydrogen gas, H_2

Solution :

First we have to calculate the moles of hydrogen gas.

\text{Moles of }H_2=\frac{\text{Mass of }H_2}{\text{Molar mass of }H_2}=\frac{2.5g}{2g/mole}=1.25moles

Now we have to calculate the volume of hydrogen gas.

As, 1 mole of gas contains 22.4 L volume of gas

So, 1.25 mole of hydrogen gas contains 1.25\times 22.4=28L volume of hydrogen gas

Now we have to calculate the limiting and excess reactant.

The given balanced reaction is,

CO(g)+2H_2(g)\rightarrow CH_3OH(l)

From the balanced reaction, we conclude that

As, 44.8 L of hydrogen gas react with 22.4 L of carbon monoxide gas

So, 28 L of hydrogen gas react with \frac{22.4L}{44.8L}\times 28L=14L of carbon monoxide gas

The excess carbon monoxide = 30 L - 14 L = 16 L

Thus, the carbon monoxide is an excess reactant because it is present in excess amount and hydrogen gas is a limiting reactant because it is present in limited amount.

Answer 2 : The mass of CH_3OH is, 20 grams

Solution :

From the balance reaction, we conclude that

2 moles of hydrogen gas react to give 1 mole of CH_3OH

1.25 moles of hydrogen gas react to give \frac{1.25}{2}=0.625 mole of CH_3OH

Now we have to calculate the mass of CH_3OH

\text{Mass of }CH_3OH=\text{Moles of }CH_3OH\times \text{Molar mass of }CH_3OH

\text{Mass of }CH_3OH=(0.625mole)\times (32g/mole)=20g

The mass of CH_3OH is, 20 grams

Answer 3 : The amount of excess reactant is, 20 grams

The excess reactant is carbon monoxide.

As, 22.4 L volume of carbon monoxide gas has 28 gram of carbon monoxide gas

So, 16 L volume of carbon monoxide gas has \frac{28}{22.4}\times 16=20 gram of carbon monoxide gas

Thus, the The amount of excess reactant is, 20 grams

You might be interested in
A gaseous compound is 30.4 % N and 69.6% OF. A 5.25 g sample of the gas occupies a volume of 1.00 L and exerts a pressure of 958
Harman [31]

Answer:

The molecular formula = N2O4

Explanation:

<u>Step 1</u>: Data given

A gaseous compound is 30.4 % N and 69.6%

Mass of the compound = 5.25 grams

Volume of the gas = 1.00 L

Pressure of the gas = 958 mmHg = 1.26 atm

Temperature of the gas = -4 °C = 273 -4°C = 269 Kelvin

Molar mass of N = 14 g/mol

Molar mass of O = 16 g/mol

<u>Step 2</u>: Calculate mass of N

Mass of Nitrogen = 5.25 grams * 0.304 = 1.596 grams

<u>Step 3:</u> Calculate mass of O

Mass of Oxygen = 5.25 grams * 0.696 = 3.654 grams

<u>Step 4:</u> Calculate number of moles N

Number of moles N = Mass of N/ Molar mass of N

Moles of N = 1.596 grams / 14g/mol

Moles of N = 0.114 moles N

<u>Step 5:</u> Calculate moles of O

Moles O = 3.654 grams / 16 g/mol

Moles 0 = 0.2884 moles

<u>Step 6:</u> Calculate empirical formule

We calculate the empirical formule by dividing number of moles by the smallest number of mol

N : 0.114 / 0.114 = 1

O: 0.2284 / 0.114 = 2

Empirical formule = NO2

<u>Step 7: </u>Calculate number of moles of 5.25 g sample via gas law:

p*V = nRT

⇒ with p = the pressure = 1.26 atm

⇒ with v = 1.00 L

⇒ with n = the number of moles = TO BE DETERMINED

⇒ with R = the gas constant = 0.08206 L*atm/ K*mol

⇒ with T = the temperature = 269 K

number of moles n = (p*V)/(R*T)

n = (1.26*1L)/(0.08206*269)

n = 0.057 mol  

<u>Step 8:</u> Calculate molar mass of the compound

This means 5.25 grams of the gas = 0.057 moles

So 1 mol of the compound has a molar mass of: 5.25 / 0.057 = 92.11 g/mol

<u>Step 9</u>: Calculate molar mass of the empirical formula NO2

N = 14 g/mol

O = 16 g/mol

NO2 = 14 + 16 + 16 = 46 g/mol

The empirical formule NO2 has a molar mass of 46 g/mol

<u>Step 10</u>: Calculate molecular formula

92.11 / 46 = 2

This means the empirical formula should be multiplied by 2

2*(NO2) = N2O4

The molecular formula = N2O4

8 0
3 years ago
What determines the order of placement of the elements on the modern Periodic Table?
Pachacha [2.7K]
The order of placement of the elemnts on the modern Periodic Table is determinated by:
1)atomic number (Z=number of protons).
3 0
3 years ago
Read 2 more answers
Which physical method can separate a mixture of steel ball bearings and marbles
Lana71 [14]
Sorting is a method that could separate those materials

6 0
3 years ago
Read 2 more answers
Which is the formula for magnesium nitride?
Mekhanik [1.2K]

Explanation:

Mg₃N₂ is the formula of magnesium nitride.

5 0
3 years ago
Read 2 more answers
Which of these correctly describes the energy that makes the carousel turn
Dmitrij [34]

Answer:

F

Explanation:

A carousel can be made to rotate using different sources of energy.  One may decide to use electric energy, manual effort, water energy or heat energy as in a candle carousel.

When the candle is lit, heat energy is supplied and warm air rises heating up the air near the carousel eventually causing it to start rotating.

Hence heat from the candle leads to a current of warm air that rises up, causing the carousel to start rotating.

8 0
3 years ago
Other questions:
  • Which statement explains why a C–O bond is
    7·2 answers
  • you are studying an animal that produces only one offspring every three or four years. Is it likely to use external or internal
    6·1 answer
  • The Earth's crust is a thin layer that takes up less than<br> %(percent) of the Earth
    5·2 answers
  • Calcium ions, barium ions, and magnesium ions all have two positive charges. What could explain the differences in the way each
    14·2 answers
  • A student wants to do scientific research on how aquatic plants in lakes have changed over time. What field of science does this
    15·1 answer
  • Which of the following is a biotic factor in the picture above?
    10·2 answers
  • What is the percent yield if 155 grams of calcium carbonate is treated with 250 grams of hydrichloric acid andb142 grams of calc
    5·2 answers
  • 80.0 mL of oxygen gas was collected when the temperature was
    6·1 answer
  • 1 Which of the following is an example of periodicity?
    9·1 answer
  • Which statement<br> about<br> gravitational force is most<br> accurate?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!