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
aliina [53]
3 years ago
10

Can anyone please suggest me a good and easy project topic for physics and chemistry. For class nine or ten students.Please plea

se please help me.​
Chemistry
1 answer:
dolphi86 [110]3 years ago
8 0
Volcano , bleach and fabuloso , flour and soap
You might be interested in
2. Draw a picture of your home. Where does the sun rise relative to your house? Where does the sunset? On the picture, indicate
Semmy [17]

Answer:

sun rises in the east so to the right of the front of your house and sets to the left which is south.

Explanation: what i just said

8 0
2 years ago
Read 2 more answers
Find the boiling point?<br> 100. g of C2H6O2 dissolved in 200 g of H2O?
aleksklad [387]

Answer:

The correct answer is 104.13ºC

Explanation:

When a solute is added to a solvent, the boiling point of the solvent (Tb) increases. That is a colligative property. The increment in Tb (ΔTb)  is given by the following expression:

ΔTb = Tb - Tbº= Kb x m

Where Tb and Tbº are the boiling points of the solvent in solution and pure, respectively; Kb is a constant and m is the molality of the solution.

In this problem, the solvent is water (H₂O). It is well known that water has a boiling point of 100ºC (Tb). The value of Kb for water is 0.512ºC/m. So, we have to calculate the molality of the solution (m):

m = moles of solute/Kg solvent

The solute is C₂H₆O₂ and we have to calculate the number of moles of this component by dividing the mass into the molecular weight (Mw):

Mw(C₂H₆O₂)= (2 x 12 g/mol) + (6 x 1 g/mol) + (2 x 16 g/mol)= 62 g/mol

⇒ moles of C₂H₆O₂ = mass/Mw = 100 g/(62 g/mol) = 1.613 moles

Now, we need the mass of solvent (H₂O) in kilograms, so we divide the grams into 1000:

200 g x 1 kg/1000 g = 0.2 kg

Finally, we calculate the molality as follows:

m = 1.613 moles of C₂H₆O₂/0.2 kg = 8.06 moles/kg = 8.06 m

The increment in the boiling point will be:

ΔTb = Kb x m = 0.512ºC/m x 8.06 m = 4.13ºC

So, the boiling point of pure water (Tbº=100ºC) will increase in 4.13ºC:

Tb= 100ºC+4.12ºC= 104.13ºC

5 0
3 years ago
Some animals only have _______ cells
White raven [17]

Answer:

Animals can have up to 40 trillion cells.

An amoeba (type of animal) has just one cell.

3 0
2 years ago
Read 2 more answers
An aqueous 0.300 M glucose solution is prepared with a total volume of 0.150 L. The molecular weight of
kherson [118]

Answer:

We need 8.11 grams of glucose for this solution

Explanation:

Step 1: Data given

Molarity of the glucose solution = 0.300 M

Total volume = 0.150 L

The molecular weight of glucose = 180.16 g/mol

Step 2: Calculate moles of glucose in the solution

Moles glucose = molarity solution * volume

Moles glucose = 0.300 M * 0.150 L

Moles glucose = 0.045 moles glucose

Step 3: Calculate mass of glucose

MAss glucose = moles glucose* molecular weight of glucose

MAss glucose = 0.045 moles * 180.16 g/mol

MAss glucose = 8.11 grams

We need 8.11 grams of glucose for this solution

6 0
3 years ago
To separate solid particles from a liquid, you would use:
enot [183]
Filtration

hope this helped
3 0
3 years ago
Other questions:
  • What is the environmental effect of 3NaCl
    12·1 answer
  • Which of the following elements has the lowest electronegativity?
    11·1 answer
  • Which equation represents the oxidation half-reaction for this redox reaction?
    9·1 answer
  • What is an isotope?
    6·1 answer
  • How many moles of alumminum os needed to react woth 6.34 moles of fe3o4 in thereaction below? 8al + 3fe3o4_ 4al2o3 +9 fe
    15·1 answer
  • What are the intermolecular forces present in Argon?
    13·1 answer
  • We can also use the equation for enthalpy change for physical phase changes. Consider the phase change H2O(l) → H2O(g). Calculat
    15·2 answers
  • Is there a polyatomic ion in calcium phosphide ?
    15·1 answer
  • How do the organelles within the cell allow life to occur?​
    14·1 answer
  • Injury to brain is fatal. So brain is protected from external shock and injury. State the ways brain is protected in the body.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!