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
blagie [28]
3 years ago
15

Octane has a density of .692 g/mL at 20 degrees C. How many grams of O2 are required to burn 19.0 gal of C8H18?

Chemistry
1 answer:
madreJ [45]3 years ago
8 0
3.64 hope that helps you 
You might be interested in
Find the percent composition of C7H5N3O6
Oksana_A [137]

Finding percent composition is fairly easy. You only need to divide the mass of an element by the total mass of the compound. We can do this one element at a time.

First, let's find the total mass by using the masses of the elements given on the periodic table.

7 x 12.011 (mass of Carbon) = 84.077

5 x 1.008 (mass of Hydrogen) = 5.04

3 x 14.007 (mass of Nitrogen) = 42.021

6 x 15.999 (mass of Oxygen) = 95.994

Add all of those pieces together.

84.077 + 5.04 + 42.021 + 95.994 = 227.132 g/mol is your total. Since we also just found the mass of each individual element, the next step will be very easy.

Carbon: 84.077 / 227.132 = 0.37016 ≈ 37.01 %

Hydrogen: 5.04 / 227.132 = 0.022189 ≈ 2.22 %

Nitrogen: 42.021 / 227.132 = 0.185 ≈ 18.5 %

Oxygen: 95.994 / 227.132 = 0.42263 ≈ 42.26 %

You can check your work by making sure they add up to 100%. The ones I just found add up to 99.99, which is close enough. A small difference (no more than 0.03 in my experience) is just a matter of where you rounded your numbers.

5 0
2 years ago
Which of the following is NOT true about nuclear fusion?
inysia [295]

<u>Answer:</u>

I think it's (C)

The products are suitable for making nuclear weapons.

hope this helps!

6 0
3 years ago
A toaster transforms electrical energy into _____ energy and _____ energy. A. heat; light B. heat; kinetic C. heat; potential D.
scoray [572]

A. heat; light energies

5 0
3 years ago
What is the final concentration of cl- ion when 250 ml of 0.20 m cacl2 solution is mixed with 250 ml of 0.40 m kcl solution? (as
serious [3.7K]

CaCl2 and KCl are both salts which dissociate in water when dissolved. Assuming that the dissolution of the two salts are 100 percent, the half reactions are:

<span>CaCl2 ---> Ca2+  +  2 Cl-</span>

KCl ---> K+ + Cl-

Therefore the total Cl- ion concentration would be coming from both salts. First, we calculate the Cl- from each salt by using stoichiometric ratio:

Cl- from CaCl2 = (0.2 moles CaCl2/ L) (0.25 L) (2 moles Cl / 1 mole CaCl2)

Cl- from CaCl2 = 0.1 moles

 

Cl- from KCl = (0.4 moles KCl/ L) (0.25 L) (1 mole Cl / 1 mole KCl)

Cl- from KCl = 0.1 moles

 

Therefore the final concentration of Cl- in the solution mixture is:

Cl- = (0.1 moles + 0.1 moles) / (0.25 L + 0.25 L)

Cl- = 0.2 moles / 0.5 moles

<span>Cl- = 0.4 moles             (ANSWER)</span>

6 0
3 years ago
What happens when a solid turns straight into a gas?
LiRa [457]

Answer:

The atoms are separating, and sublimation is happening.

Explanation:

5 0
3 years ago
Other questions:
  • Question 22 A mixture of krypton and argon gas is expanded from a volume of 33.0L to a volume of 61.0L , while the pressure is h
    14·1 answer
  • Justine is a nursing assistant who is helping Felix into the sitting position on his bed. She has just pivoted Felix's legs over
    8·1 answer
  • URGENT If you take four gas samples with the following pressures: 12.3 atm, 56.7 atm, 1.09 atm, and 32.6 atm. What is the total
    10·1 answer
  • HHHHEEELLLPPPP PLZ ANd thanks mfs .
    14·1 answer
  • Choose all the correct information concerning chemical reactions: Involves small amounts of energy. Some of the mass is converte
    14·2 answers
  • 30) How many grams of CH3OH must be added to water to prepare 210 mL of a solution that is
    15·1 answer
  • Please help me with number 4
    8·1 answer
  • There are several different models that represent compounds. One type of model is shown.
    5·2 answers
  • What makes an element the same as another element
    6·1 answer
  • . How many grams of water would require 4400 joules
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!