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
Pavel [41]
3 years ago
10

CAN SOMEONE HELP ME PLZ AND THANKS WILL MARK U AS BRAINLIEST

Chemistry
1 answer:
jekas [21]3 years ago
8 0

Explanation:

2. 2C_2H_6 + 7O_2 \rightarrow 4CO_2 + 6H_2O

First, we need to find the number of moles of CO_2 at 300K and 1.5 atm using the ideal gas law:

n= \dfrac{PV}{RT}= \dfrac{(1.5\:\text {atm})(33\:L)}{(0.082\:\text{L-atm/mol-K})(300K)}

=2.0\:\text{mol}\:CO_2

Now use the molar ratios to find the number of moles of ethane to produce this much CO_2.

2.0\:\text{mol}\:CO_2 \times \left(\dfrac{2\:\text{mol}\:C_2H_6}{4\:\text{mol}\:CO_2}\right)

=1.0\:\text{mol}\:C_2H_6

Finally, convert this amount to grams using its molar mass:

1.0\:\text {mol}\:C_2H_6 \times \left(\dfrac{30.07\:\text g\:C_2H_6}{1\:\text{mol}\:C_2H_6} \right)

=30.1\:g\:C_2H_6

3. 3Zn + 2H_3PO_4 \rightarrow 3H_2 + Zn_3(PO_4)_2

Convert 75 g Zn into moles:

75\:\text g\:Zn \times \left(\dfrac{65.38\:\text g\:Zn}{1\:\text{mol}\:Zn}\right)=1.1\:\text{mol}\:Zn

Then use the molar ratios to find the amount of H2 produced.

1.1\:\text{mol}\:Zn \times \left(\dfrac{3\:\text{mol}\:H_2}{3\:\text{mol}\:Zn}\right)=1.1\:\text{mol}\:H_2

Now use the ideal gas law PV=nRT to find the volume of H2 produced at 23°C and 4 atm:

V= \dfrac{nRT}{P}= \dfrac{(1.1\:\text{mol}\:H_2)(0.082\:\text{L-atm/mol-K})(296K)}{4\:\text{atm}}

=8.9\:\text L\:H_2

You might be interested in
Consider this reaction and answer the questions:
Mandarinka [93]

Balanced chemical reaction: 2KClO₃ → 2KCl + 3O₂.

Potassium is metal from first group of Periodic table of elements, it has always oxidation number in compound +1.

Chlorine in the reactant state has oxidation number +5 (+1 + x + 3 · (-2) = 0) and it is reduced to -1 (+1 + x = 0) in the product state.

Oxygen in the reactant state has oxidation number -2 (+1 + 5 + 3 · x = 0) and it is oxidized to 0 (in molecule of oxygen) in the product state.

3 0
3 years ago
Read 2 more answers
4 kmol Methane (CH4) is burned completely with the stoichiometric amount of air during a steady-flow combustion process. If both
Svetach [21]

Answer:

Heat transfer = 3564 Jolues

The same value

Explanation:

The heat of combustion is the heat released per 1 mole of substunce experimenting the combustion at standard conditions of pressure and temperature ( 1 atm, 298 K):

Qtransfer = - mol x ΔHºc Qtransfer

So look up in appropiate reference table ΔHºc  and solve the problem:

ΔHºc  = - 891 kJ/mol

Qtransfer = - (4 x 10³ mol x  -891 kJ/mol ) = 3564 J

if the combustion were achieved with 100 % excess air, the result will still be the same. As long as the standard conditions are maintained, the heat of combustion remains constant. In fact in many cases the combustion is performed under excess oxygen to ensure complete combustion.

7 0
3 years ago
How is filtration done?<br> What is the difference between residue and filtrate?
LiRa [457]

Answer:

residue is whatever remains after something else has been removed while filtrate is the liquid or solution that has passed through a filter, and which has been separated from the filtride.

filtration id done by placing a filter paper on the beaker or container then pour the filtride then let it settle and it will pass through and you will have the fitrate and residue

Explanation:

3 0
3 years ago
Problema 5
malfutka [58]

Answer:

dwwq is a lot more than a lot more than a year ago and I am a very young ers and I

33rd century fox was a great place to girl and I was a little bit older than a couple of years ago and I was a little bit older than I was a little bit older than I was a little bit older than I was a little bit older than I was a little bit older than I was a little bit older than I was a little bit older than I was a little bit older than I was a little bit

Explanation:

read the full article below to see how the upper c and other factors of a child are at risk for the child or child care act and a lot 5AM in 555inches of a child is filtration of a single person who is filtration

4 0
3 years ago
2. Calculate the concentration (in molarity) of a NaOH solution if 25.0 mL of the solution are needed to neutralize 17.4 mL of a
zimovet [89]

Answer:

0.217 M NaOH

Explanation:

M1V1 = M2V2

M1 = 0.312 M HCl

V1 = 17.4 mL HCl

M2 = ?

V2 = 25.0 mL NaOH

Solve for M2 --> M2 = M1V1/V2

M2 = (0.312 M)(17.4 mL) / (25.0 mL) = 0.217 M NaOH

3 0
3 years ago
Other questions:
  • What is the first step to determine the sequence of filling electron configurations of an element?
    10·1 answer
  • a gas cylinder contains 2.0 mol of gas X and 6.0 mol of gas Y at a total pressute of 2.1 atm. what is he partial pressure of gas
    10·2 answers
  • Complete and balance the molecular equation, including phases, for the reaction of aqueous sodium sulfate, Na2SO4, and aqueous b
    15·2 answers
  • Use the E0 values of the following elements: Zn, Cu, Pb, and Al. Which element is the most active reducing agent?
    5·1 answer
  • What is the hybridization of the central atom in the phosphorus pentafluoride (PF3) molecule?
    7·1 answer
  • I need to know how to do this problem
    5·1 answer
  • Hi!! can somebody help me with this question?
    12·1 answer
  • What is the theoretical yield of Mg(s) + O2(g) → MgO(s)
    12·1 answer
  • How many molecules are there in 5.9 moles of NaCl?
    6·1 answer
  • Scientists recently discovered that firing low-energy particles at potatoes keeps the potatoes
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!