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
monitta
3 years ago
11

What is the percent by volume of ethanol (C2H60, or ethyl alcohol) in the final solution when 90 mL of ethanol is diluted to a v

olume of 550 mL with water?

Chemistry
1 answer:
r-ruslan [8.4K]3 years ago
8 0

Answer:

16.0%.

Explanation:

Volume percent of a substance is the ratio of the substance volume to the solution volume multiplied by 100.

V % of ethanol = (volume of ethanol / volume of the solution) x 100.

volume of ethanol = 90.0 mL, volume of the solution = 550.0 mL.

∴ V % of ethanol = (90.0 mL / 550.0 mL) x 100 = 16.36% ≅ 16.0%.

You might be interested in
Which is a gas at room temperature?
dalvyx [7]

Answer:

Several of the nonmetals are gases in their elemental form. Elemental hydrogen (H, element 1), nitrogen (N, element 7), oxygen (O, element 8), fluorine (F, element 9), and chlorine (Cl, element 17) are all gases at room temperature, and are found as diatomic molecules (H2, N2, O2, F2, Cl2).

Explanation:

8 0
3 years ago
Read 2 more answers
When is the Sun directly overhead in the continental United States?
astra-53 [7]

Answer:

C.

Explanation:

The sun is directly overhead at noon on the equator on the first day of spring, and on the first day of fall. You would have to be less than 23.5 degrees above or below the equator to have the Sun pass directly overhead. Therefore, it never occurs in the continental US.

6 0
3 years ago
Read 2 more answers
How many pints are in a 48 cups?
Feliz [49]
1 cup = 2 pints

48 × 2 = 96 pints

HOPE THIS HELPED
:)
8 0
3 years ago
Note the mass of copper(1) oxide formula unit 143.091 what is the mass of 8.250 moles of Cu2O
baherus [9]

Answer:

The mass of 8.250 moles of Cu2O is 1180.5g

Explanation:

HOW TO CALCULATE MASS OF A SUBSTANCE:

  • The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass as follows:

Mass (g) = no. of moles (mol) × molar mass (g/mol)

  • Molar mass of copper (I) oxide (Cu2O) = 63.5(2) + 16 = 143.09 g/mol

Mass of Cu2O = 8.250 mol × 143.09 g/mol

Mass of Cu2O = 1180.5 g

Therefore, the mass of 8.250 moles of Cu2O is 1180.5 g.

6 0
3 years ago
Solve the following problems on ideal gas equation. Practice makes perfect.
photoshop1234 [79]

Answer:

0.012mol

Explanation:

1.

Given parameters:

Pressure in the balloon  = 1.25atm

Volume of the balloon  = 2.5L

Unknown:

Number of moles  = ?

Solution:

We are going to used the combined gas law to solve this problem.

  PV = nRT

P is the pressure

V is the volume

n is the number of moles

R is the gas constant  = 0.082atmdm³mol⁻¹K⁻¹

 Insert the parameters and solve;

    1.25 x 2.5  = n x 0.082 x 285

       n  = 0.13mol

The number of moles is 0.13mol

2.

Given parameters:

Pressure  = 16torr;

   to atm is ;

                 760torr  = 1atm

                  16torr = \frac{16}{760}   = 0.02atm

Volume = 12L

Temperature  = 253K

Using the ideal gas law;

        PV  = nRT

       0.02x12  = n x 0.082 x 253

            n = 0.012mol

           

7 0
3 years ago
Other questions:
  • What are two different kinds of rock that are easily weathered by carbonic acid?
    10·1 answer
  • What is DNA? What information does it carry? Where is DNA located?
    15·1 answer
  • A 5.0 g sample of aluminum with a specific heat of 0.90 J/(g °C) was heated from 22.1°C to 32.1°C. How much heat, to the nearest
    15·1 answer
  • In a
    8·1 answer
  • Is it correct to say that only one observable change accompanies a chemical change?
    7·1 answer
  • What do atoms form when they bond chemically?
    11·1 answer
  • Complete the sentences about heme. Some terms will not be used. The prosthetic group of hemoglobin and myoglobin is . The organi
    15·1 answer
  • What is oxidized in a galvanic cell? O A. The salt bridge O B. The electrolytes O C. The cathode D. The anode​
    9·1 answer
  • One way to identify the type of radioactive decay produced in a reaction is to pass the emission through an electric field. Desc
    11·1 answer
  • A particular forest is 10,000 acres. Determine its size in hectares. (1 hectare = 2.47
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!