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
Lapatulllka [165]
3 years ago
8

What is a level 7-8 grade science fair project I can do?

Chemistry
1 answer:
Delicious77 [7]3 years ago
4 0
Making an atom or a virus structure
You might be interested in
The following is what type of reaction: 2Al(s) + 3CuCl2(aq) ---> 2AlCl3(aq) + 3Cu(s)
Volgvan

Answer:

single replacment

Explanation:

7 0
3 years ago
4. Write the electronic configuration of first 20 elements in the periodic table.
DIA [1.3K]

Answer:

Name Atomic Number Electron Configuration Period 1 Hydrogen 1 1s1 Helium 2 1s2 Period 2 Lithium 3 1s2 2s1 Beryllium 4 1s2 2s2 Boron 5 1s2 2s22p1 Carbon 6 1s2 2s22p2 Nitrogen 7 1s2 2s22p3 Oxygen 8 1s2 2s22p4 Fluorine 9 1s2 2s22p5 Neon 10 1s2 2s22p6 Period 3 Sodium 11 1s2 2s22p63s1 Magnesium 12 1s2 2s22p63s2 Aluminum 13 

7 0
2 years ago
Please help me with this chemistry problem
Margarita [4]

Answer:

50 g of K₂CO₃ are needed

Explanation:

How many grams of K₂CO₃ are needed to make 500 g of a 10% m/m solution?

We analyse data:

500 g is the mass of the solution we want

10% m/m is a sort of concentration,  in this case means that 10 g of solute (K₂CO₃) are contained in 100 g of solution

Therefore we can solve this, by a rule of three:

In 100 g of solution we have 10 g of K₂CO₃

In 500 g of solution we may have, (500 . 10) / 100 = 50 g of K₂CO₃

6 0
3 years ago
Someone pls help me I will mark you as brain
Reptile [31]
3rd one I think it is.
5 0
2 years ago
PLS HELP! If I have 17 moles of gas at a temperature of 67°C, and a pressure of 5.34 atmospheres, what is the volume of the gas?
sveta [45]

Answer: If I have 17 moles of gas at a temperature of 67°C, and a pressure of 5.34 atmospheres, what is the volume of the gas? write down all the givens of the problem

8 0
3 years ago
Read 2 more answers
Other questions:
  • When you find something that interests you, how do you make a hypothesis
    14·2 answers
  • What is the formula for CaCO3
    14·1 answer
  • state how matter moves through the biosphere. state how energy moves through the biospere. explian each statement using examples
    11·1 answer
  • A solution has a22.0*10^-6 H30^+ Calculate the OH^- and pH of this solution, be sure to show work.
    6·1 answer
  • Check all items common to bases:
    12·2 answers
  • What is the δg for the following reaction at 25°c? so3(g) h2o(l) → h2so4(l) given: so3(g):δg= –368 kjper mole h2o(l):δg= –237 kj
    6·1 answer
  • Two disadvantages to deforestation
    6·2 answers
  • Diffusion through the capillary walls allows ____.
    12·1 answer
  • Is using matches to light a candle physical or chemical change ?
    10·2 answers
  • If the energy difference between two electronic states is 214.68 kJ / mol , calculate the frequency of light emitted when an ele
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!