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
IceJOKER [234]
2 years ago
10

One tank of gasoline has an octane rating of 140 and another tank of gasoline has an octane rating of 80. to obtain a mixture of

60 gallons with an octane rating of 120, how many gallons should be used from the tank with the octane rating of 80?
Chemistry
1 answer:
lutik1710 [3]2 years ago
8 0
Call x the volume of gas whose octane rating is 140 and y the volume of gas whose octane rating is 80, then:

(1) x*140 + y*80 = 60*120, and

(2) x + y = 60

from (1) 140x + 80y = 7200 => (3) 7x + 4y = 360

from (2) --->                              (4) 4x + 4y = 240

Subtract (4) from (3)

7x - 4x = 360 - 240

3x = 120

=> x = 120/3 = 40

=> y = 120 - 40 = 80

Answer: should be used 80 gallons from tank with the octane rating of 80


You might be interested in
Which commercial technology commonly uses plasmas?
Ugo [173]
A television uses plasmas
8 0
3 years ago
Read 2 more answers
Hydrofluoric acid is what type of acid?
posledela

Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water. Solutions of HF are colourless, acidic and highly corrosive. It is used to make most fluorine-containing compounds; examples include the commonly used pharmaceutical antidepressant medication fluoxetine (Prozac) and the material PTFE (Teflon).

5 0
2 years ago
Choose the correct name for each acid. Click here
Zigmanuir [339]

Answer:

1. Nitrous Acid

2. Hydroiodic Acid

3. Phosphoric Acid

Explanation:

Just did the lesson

7 0
3 years ago
Read 2 more answers
Calculate the molarity 20ml of 3.5 m kci in to a final volume of 100 ml​
satela [25.4K]

Answer:

Molarity =  0.7 M

Explanation:

Given data:

Volume of KCl = 20 mL ( 0.02 L)

Molarity = 3.5 M

Final volume = 100 mL (0.1 L)

Molarity in 100 mL = ?

Solution:

Molarity = number of moles of solute / volume in litter.

First of all we will determine the number of moles of KCl available.

Number of moles = molarity × volume in litter

Number of moles = 3.5 M × 0.02 L

Number of moles = 0.07 mol

Molarity in 100 mL.

Molarity = number of moles / volume in litter

Molarity =  0.07 mol /0.1 L

Molarity =  0.7 M

3 0
3 years ago
The chemical formula for ethanol is C2H601.How many total atoms are in 30 molecules of ethanol?
12345 [234]
There are two carbon atoms in every ethanol molecule, so there would be 60 carbons all together.

I hope this helped you!
3 0
3 years ago
Other questions:
  • A system of gas at low density has an initial pressure of 1.90 × 10 5 1.90×105 Pa and occupies a volume of 0.18 m³. The slow add
    7·1 answer
  • Two isotopes of the same element will have the same _____ but a different ____. (2 points)
    13·1 answer
  • Determine the number of atoms in 3.62 mL of mercury. The density of mercury is 13.5g/mL
    12·1 answer
  • Which of the following is an example of chemical weathering?
    10·2 answers
  • A student noticed while doing the neutralization experiment that the calorimeter kept getting warmer. how would this error affec
    6·1 answer
  • Explain why the enthalpies of vaporization of the following substances increase in the order CH4 < NH3 < H2O, even though
    13·1 answer
  • Select the correct answer.
    10·1 answer
  • A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). If the partial pressur
    12·1 answer
  • Please help!! Also please provide an explanation
    13·1 answer
  • True or false
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!