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
Olenka [21]
3 years ago
9

How many moles of O2 are needed to react with 2.55 mol of C2H2?

Chemistry
1 answer:
Lelechka [254]3 years ago
3 0

Answer: 6.38 moles of O_2 are needed to react with 2.55 mol of C_2H_2

Explanation:

The balanced chemical reaction for the combustion of ethyne is:

2C_2H_2+5O_2\rightarrow 4CO_2+2H_2O

According to stoichiometry:

2 moles of C_2H_2 require = 5 moles of O_2

Thus 2.55 mol of C_2H_2 require = \frac{5}{2}\times 2.55=6.38 moles of O_2

Thus 6.38 moles of O_2 are needed to react with 2.55 mol of C_2H_2

You might be interested in
How many moles of gas will occupy a volume of 2.5 l at 12.0 atm and 25c?
alexandr1967 [171]

Answer:

1.23 moles

Explanation:

Ideal gas law

PV = n RT                 R = .082057 L-atm/mol-K

25 C = 298.15 K

12 (2.5) = n (.082057) (298.15)      n = 1.23 moles

3 0
2 years ago
Identify fossil types match each each type of fossil to its description
dem82 [27]
Well we need to see the fossil
4 0
3 years ago
Read 2 more answers
Can you identify an atom without knowing number of neutrons in it?​
Pie

Answer:

yes

Explanation:

to identify an atom you need to know either it's atomic number or it's proton number

while the neutron is used to determine it's atomic mass

6 0
2 years ago
The reaction represented by this graph is an exothermic reaction. According to the graph, which statement is true? Reactants hav
Sunny_sXe [5.5K]

Answer:

Reactants have more energy than products

Explanation:

Generally, in an exothermic reaction heat is released. In other words, energy is released. So you start with reactants which have a set amount of stored chemical energy, and you lose some in the reaction. Since energy is 'leaving', the stored chemical energy in the products is less than what we started with in the reactants. When given a graph, you can tell this is true because going from left to right, the line representing the stored chemical energy will start at a higher level than where it ends.

7 0
3 years ago
Read 2 more answers
If 0.5 moles of CaO is mixed into 2 liters of solution, what is the molarity? Group of answer choices 0.25 moles / liter 4 moles
Vsevolod [243]

Answer:

The correct answer is 0.25 moles/liter

Explanation:

Molarity is a measure of concentration and is defined as the moles of solute in 1 liter of solution.

2 L solution-----0,5 moles of CaO

1 L solution -----x= (1 L solutionx0,5 moles of CaO)/2 L solution =

<em>x=0, 25 moles of Cao ---> 0,25M</em>

8 0
4 years ago
Other questions:
  • Pottery has a mass of 0.61 g and a volume of 0.260 cm3. What is the density?
    7·1 answer
  • How many grams of sodium metal are needed to react completely with 25.8 liters of chlorine gas at 293 Kelvin and 1.30 atmosphere
    9·1 answer
  • Calculate the number of atoms in a 3.96 × 103 g sample of silicon.
    11·1 answer
  • The most efficient way to determine whether a reaction is an exothermic chemical reaction is to use - sol
    8·1 answer
  • What is the predominant use of oil in the United States?
    7·1 answer
  • Help?? help for mee??? maybe? what if i said...please????
    11·1 answer
  • A student does a PCR to make copies of the HDR template transformation. They column-clean the PCR, eluting in 20 ul of warm elut
    6·1 answer
  • What is the electron configuration for zirconlum?
    7·1 answer
  • The graph above represents an object moving with a __________________. A) constant velocity B) constant acceleration C) constant
    6·1 answer
  • What is a renewable resource on Earth?<br><br> minerals<br> coal<br> wind<br> petroleum
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!