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
Paraphin [41]
3 years ago
11

Science fair ideas? please help

Chemistry
2 answers:
egoroff_w [7]3 years ago
8 0
You can Maybe do a volcano?
Neko [114]3 years ago
7 0
When I was in elementary school, I grew several pea plants and watered them with different liquids and measured their growth.  
This is a good experiment because the plants were easy to care for, it provided a lot of pictures which made it easy to present, and it required minimal research. 

You might be interested in
You could add aquous hydrochloric to the solution to precipitate out silver chloride. What volume of a 0.130 M aqueous hydrochlo
Mila [183]
1) Chemical reaction: AgNO₃ + HCl → AgCl + HNO₃.
V(AgNO₃) = 30,0 mL = 0,03 L.
c(AgNO₃) = 0,225 mol/L.
n(AgNO₃) = 0,03 L · 0,225 mol/L.
n(AgNO₃) = 0,00675 mol.
From chemical reaction: n(AgNO₃) : n(HCl) = 1 : 1.
0,00675 mol : n(HCl) = 1 : 1.
n(HCl) = 0,00675 mol.
V(HCl) = n(HCl) ÷ c(HCl).
V(HCl) = 0,00675 mol ÷ 0,130 mol/L.
V(HCl) = 0,0519 L = 51,92 ml.

2) 1) Chemical reaction: AgNO₃ + KCl → AgCl + KNO₃.
V(AgNO₃) = 30,0 mL = 0,03 L.
c(AgNO₃) = 0,225 mol/L.
n(AgNO₃) = 0,03 L · 0,225 mol/L.
n(AgNO₃) = 0,00675 mol.
From chemical reaction: n(AgNO₃) : n(KCl) = 1 : 1.
0,00675 mol : n(KCl) = 1 : 1.
n(KCl) = 0,00675 mol.
m(KCl) = n(KCl) · M(KCl).
m(KCl) = 0,00675 mol · 74,55 g/mol.
m(KCl) = 0,503 g.
n - amount of substance.
M - molar mass.
5 0
3 years ago
In this redox reaction, identify the reducing agent.
postnew [5]
The answer would be MgO, as you spilt the two.
5 0
4 years ago
How is n1 in the Rydberg equation related to the quantum number n in the Bohr model?How is n1 in the Rydberg equation related to
andre [41]

Ansddwdccwer:

ExplanationBecause:

7 0
4 years ago
Column A 1. Reproduction: Reproduction 2. offspring: offspring 3. gamete: gamete 4. Budding: Budding 5. Binary fission: Binary f
7nadin3 [17]

Answer:

1. Reproduction: One or two parents, organisms make new offspring

2. Offspring: A new living organism

3. Gamete: female and male create mini-me by cell division

4. Budding: Hydra

5. Binary fission: Bacteria

6. Zygote: The original cell after egg cell and sperm cell join

7. Fragmentation/Regeneration: Sea star / Planarian

8. Mitosis: Healling and growth occurs in budding

9. Meiosis: Egg or sperm cell/ specialized cells

Explanation:

1. Reproduction is the process by which organisms make new offspring either sexually (involving two parents) or asexually (involving one parent only).

2. An Offspring is a new living organism

3. A gamete is a mature sexual reproductive cell, as a sperm or egg, that unites with another cell to form a new organism. It formed from female and male parents by cell division known as meiosis

4. Budding is a form of asexual reproduction in which a new offspring grows out from a part of the parent. It occurs in Hydra.

5. Biinary fission is a form of asexual reproduction which involves a separation of the parent into two new offspring. It commonly occurs in Bacteria

6. Zygote is the original cell formed after egg cell and sperm cell fuse.

7. Fragmentation/Regeneration: this is a form of reproduction in which a parent splits into fragments which are then able to develop into new organisms. It occurs in Sea star and Planarians

8. Mitosis is a form of cell division which a cell divides into two identical daughter cells with the same genetic components as the parent cell. It functions in healing and growth as well as in budding

9. Meiosis is a type of cell division that results in the production of sex cells or gametes. The number of chromosomes in the parent cell is halved and four gamete cells are produced. Egg or sperm cell/ specialized cells are produced by meiosis.

5 0
3 years ago
Why do real gases not behave exactly like ideal gases?
Korvikt [17]

The theory assumes that collisions between gas molecules and the walls of a container are perfectly elastic, gas particles do not have any volume, and there are no repulsive or attractive forces between molecules .

5 0
3 years ago
Read 2 more answers
Other questions:
  • When there are equal forces from opposite directions acting on an object, the forces are said to be which of the following?
    8·1 answer
  • If a gas's temperature doubles and its volume remains constant, then what happens to its pressure?
    6·1 answer
  • a bullet leaves the muzzle of a rifle and 5 seconds later becomes embedded in a tree trunk 3000 meters away what is the average
    12·1 answer
  • How many atoms of hydrogen are in hydroxide molecule?
    10·1 answer
  • What is the relationship between the frequency of electromagnetic waves and their wavelengths? A. As frequency increases, wavele
    8·2 answers
  • Putting a straw in a glass of water can often make the straw look broken, even though it is in perfect condition. Which of the f
    14·1 answer
  • According to the Bohr model, the energy of the hydrogen atom is given by the equation: E = (-21.7 x 10 -19 J)/ n 2 Calculate the
    7·1 answer
  • How many valence electrons does each of the following atoms have?
    9·1 answer
  • How much energy is required to completely melt a 250 gram ice cube that is already at 0 degrees Celsius? Show your work & un
    12·1 answer
  • Why did all sodium compounds show the same colour in the flame?<br> (flame test)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!