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
saw5 [17]
3 years ago
7

Which method would be best to separate a mixture of sand and gravel?

Chemistry
2 answers:
solniwko [45]3 years ago
7 0
Here, as they both are physical things without any magnetic property & density difference, screening would be best.

In short, Your Answer would be Option C

Hope this helps!
White raven [17]3 years ago
4 0

screening.....................................

You might be interested in
How many molecules are in 4.2 miles of water?​
viktelen [127]

Answer:

2.5284 x 10^24

4 0
3 years ago
Which of the following reactions is the least energetic? Question 18 options: ATP + H2O → ADP + Pi ATP + H2O → AMP + PPi AMP + H
Mama L [17]

Answer:

The correct answer is AMP+H2O→ Adenosine + pi

Explanation:

The above reaction is least energetic because there is no phosphoanhydride bond present with adenosine mono phosphate.Phospho anhydride bond is an energy rich bond.

As a result hydrolysis of AMP generates very little amount of energy in comparison to the hydrolysis of ATP and ADP.

   

8 0
3 years ago
____ 26. what is the weight percentage of nitrogen in urea, cn2h4o
Paraphin [41]
Weight percentage of nitrogen can be calculated using the following rule:
weight percentage of nitrogen = (weight of nitrogen / weight of urea) x 100

From the periodic table:
molecular mass of carbon = 12 grams
molecular mass of nitrogen = 14 grams
molecular mass of hydrogen = 1 grams
molecular mass of oxygen = 16 grams

therefore:
mass of nitrogen in urea = 2(14) = 28 grams
mass of urea = 12 + 2(14) + 4(1) + 16 = 60 grams

Substitute with the masses in the equation to get the percentage:
weight percentage of nitrogen = (28/60) x 100 = 46.667%
7 0
3 years ago
Which one of the following substances is a liquid fuel used in rocket engines?
kotegsom [21]

Must be C because the liquid fuel is Codium nitrate to be used in rocket engines

6 0
3 years ago
Read 2 more answers
How many atoms of mercury are present in 3.2 cubic centimeters of liquid mercury? the density of mercury is 13.55 g/cc. answer i
jenyasd209 [6]

Answer:

             1.3 × 10²³ Atoms of Mercury  

Solution:

Step 1: Calculate Mass of Mercury using following formula,

                               Density  =  Mass ÷ Volume

Solving for Mass,

                               Mass  =  Density × Volume

Putting values,

                               Mass  =  13.55 g.cm⁻³ × 3.2 cm³                ∴ 1 cm³ = 1 cc

                               Mass  =  43.36 g

Step 2: Calculating number of Moles using following formula;

                               Moles  =  Mass ÷ M.mass

Putting values,

                               Moles  =  43.36 g ÷ 200.59 g.mol⁻¹

                               Moles  =  0.216 mol

Step 3: Calculating Number of Atoms using following formula;

                               Number of atoms  =  Moles × 6.022 ×10²³

Putting value of moles,

                               Number of Atoms  =  0.216 mol × 6.022 × 10²³

                              Number of Atoms  =  1.3 × 10²³ Atoms of Hg

7 0
3 years ago
Other questions:
  • What is a physical property of silver?
    6·2 answers
  • ??????????????????????????????
    10·1 answer
  • Which is not necessarily a way that chemistry impacts people’s lives?
    9·1 answer
  • 2. Calculate: For each object, substitute the values you know into the gravitational potential energy equation to solve for weig
    12·1 answer
  • What is the geometric shape of this molecule based on this diagram?
    9·2 answers
  • Name the property of salt investigated in the above experiment
    10·1 answer
  • Differences between expansion of solid and liquid​
    8·1 answer
  • Solid potassium chloride is obtained by the reaction of solid potassium and chlorine gas.
    11·1 answer
  • An unbalanced chemical equation is shown: 2NaN3 → 2Na + N2 Which of the following statements explains why the equation is not ba
    11·2 answers
  • Please help I will mark brainliest if you answer first let's see who gets brainliest
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!