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
Liula [17]
3 years ago
13

How could you separate a mixture of rocks and sand

Chemistry
1 answer:
Assoli18 [71]3 years ago
7 0
Sedimentation and decantation




You might be interested in
A 720. cm^3 vessel contains a mixture of Ar and Xe. If the mass of the gas mixture is 2.966 g at 25.0°C and the pressure is 760.
sleet_krkn [62]

Explanation:

The given data is as follows.

      Pressure (P) = 760 torr = 1 atm

      Volume (V) = 720 cm^{3} = 0.720 L

     Temperature (T) = 25^{o}C = (25 + 273) K = 298 K

Using ideal gas equation, we will calculate the number of moles as follows.

                                PV = nRT

   Total atoms present (n) = \frac{PV}{RT}

                                          = 1 \times \frac{0.720 L}{0.0821 \times 298}

                                           = 0.0294 mol

Let us assume that there are x mol of Ar and y mol of Xe.

Hence, total number of moles will be as follows.

               x + y = 0.0294

Also,      40x + 131y = 2.966

             x = 0.0097 mol

              y = (0.0294 - 0.0097)

                = 0.0197 mol

Therefore, mole fraction will be calculated as follows.

Mol fraction of Xe = \frac{y}{(x+y)}

                               = \frac{0.0197}{0.0294}

                              = 0.67

Therefore, the mole fraction of Xe is 0.67.

6 0
3 years ago
Which correctly lists the types of matter, in terms of their atoms, in order from least tightly packed to most tightly packed?
SSSSS [86.1K]

Answer:

D

Explanation:

gas are well separated with no regular arrangement and spreaded all over. liquid are close together with no regular arrangement and slightly spreaded. solid are tightly packed, usually in a regular pattern and not spreaded at all.

3 0
3 years ago
Read 2 more answers
Why is it important to control all of the variables except one in an experiment?
Ad libitum [116K]
Any given experiment has numerous control variables, and it's important for a scientist to try to hold all variables constant except for the independent variable. If a control variable changes during an experiment, it may invalidate the correlation between the dependent and independent variables.



It’s copied and pasted from google so make sure to put it in your words :)

5 0
3 years ago
Read 2 more answers
What is the Lewis dot structure for oxygen?
BabaBlast [244]
This is the Lewis Dot structure for oxygen

5 0
3 years ago
Out of all the states of matter (gas,liquid,plasma,solid) which one to maintain a definite shape?
marissa [1.9K]

the answer would be solid :)

5 0
3 years ago
Other questions:
  • A _ reaction occurs when a substance usually containing carbon reacts with oxygen to produce energy in the form of light and hea
    12·1 answer
  • How much heat in kilojoules is required to heat 56 l of water from 89 ∘f to 212 ∘f?
    5·1 answer
  • A piece of stainless steel weighing 1.55 g absorbs 141 J of heat energy when its temperature increases by 178oC. What is the spe
    12·2 answers
  • Select the correct answer.
    13·2 answers
  • What is the relationship between urbanization and population increase
    8·1 answer
  • The substance that does the dissolving in a solution is called a(n) __________.
    11·2 answers
  • The Earth's diameter at the equators is _____ its diameter at the poles. A:greater than B:equal to C:less than
    8·1 answer
  • Draw the curved arrows showing a proton transfer reaction, and draw the products of that proton transfer. Do not include the Li
    10·1 answer
  • Actual yield must be determined by
    6·1 answer
  • Which of the following chemical equations are correctly balanced? Balance the equations that are not balanced.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!