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
lakkis [162]
3 years ago
11

What are the three types of scientific investigations?

Chemistry
2 answers:
borishaifa [10]3 years ago
6 0
D should be the right answer hope this helps
pashok25 [27]3 years ago
4 0
D.... I think it might be D lol 
You might be interested in
At 20 ∘C the vapor pressure of benzene C6H6 is 75 torr and that of toluene C7H8 is 22 torr. Assume that benzene and toluene fo
Olegator [25]

Answer:

a) Xbenzene = 0.283

b) Xtoluene = 0.717

Explanation:

At T = 20°C:

⇒ vapor pressure of benzene (P*b) = 75 torr

⇒ vapor pressure toluene (P*t) = 22 torr

Raoult's law:

  • Pi = Xi.P*i

∴ Pi: partial pressure of i

∴ Xi: mole fraction

∴ P*i: vapor pressure at T

a) solution: benzene (b) + toluene (t)

∴ Psln = 37 torr;   at T=20°C

⇒ Psln = Pb + Pt

∴ Pb = (Xb)*(P*b)

∴ Pt = (Xt)*(P*t)

∴ Xb + Xt = 1

⇒ Psln = 37 torr = (Xb)(75 torr) + (1 - Xb)(22 torr)

⇒ 37 torr - 22 torr = (75 torr)Xb - (22 torr)Xb

⇒ 15 torr = 53 torrXb

⇒ Xb = 15 torr / 53 torr

⇒ Xb = 0.283

b) Xb + Xt = 1

⇒ Xt = 1 - Xb

⇒ Xt = 1 - 0.283

⇒ Xt = 0.717

6 0
3 years ago
A concentration cell consists of two Sn/Sn2+ half-cells. The solution in one half-cell A is 0.13 M Sn(NO3)2 and is 0.87 M Sn(NO3
alina1380 [7]
Base on your question where a concentration cell consist of two SN/SN2+half cells. The solution in one half cell A is 0.13M SN(NO3)2 and is 0.87 M Sn(NO3)2 in the other half cell to get the cell potential at 25 degree the answer is 0.059/2 log0.13/0.87
6 0
3 years ago
3. During this lesson, you observed a chemical reaction between ammonium hydroxide and iron acetate. Describe the properties of
lisov135 [29]
Wish I can help, but I don't take chemistry. :(
fly sry
6 0
3 years ago
Read 2 more answers
Is it a physical or chemical change when a candle is lit
never [62]

Answer:

Gtgggg

Explanation:

Bgfvffff

6 0
2 years ago
Read 2 more answers
When adding or subtracting deelmals, how many digits should the answer contain?
Alexus [3.1K]

Answer:

Depends, but in most cases, 2.

It's best to use as many digits as possible to keep it accurate.

Explanation:

This varies between teachers, as most schools go with 2 decimal places.

This is something that depends in your situation.

You technically want as many decimals as possible to keep it as accurate, but most people stick with 2.

I personally do 3, and commonly do 5 sometimes.

5 0
3 years ago
Other questions:
  • Why does a hot water bottle feel warm? Options: Molecules in the hot water bottle are moving faster than molecules in the skin.
    8·2 answers
  • (EASY!!) What is the name for this structure?
    11·2 answers
  • En las siguientes reacciones identifique cuales sustancias corresponden a ácidos y bases de Arrhenius y cuales a ácidos y bases
    11·1 answer
  • A student takes a sample of KOH solution and dilutes it with 100.00 mL of water. The student determines that the diluted solutio
    5·1 answer
  • Which atom has the weakest attraction for electrons in a chemical bond?(1) a boron atom (3) a fluorine atom(2) a calcium atom (4
    15·2 answers
  • The 3 particles of the atom are
    11·1 answer
  • How many kilojoules of energy would be required to heat a 225g block of aluminum from 23.0 C to 73.5 C?
    5·1 answer
  • 40.0 g of ice cubes at 0.0°C are combined with 150. g of liquid water at 20.0°C in a coffee cup calorimeter. Calculate the final
    7·1 answer
  • What is the limiting reagent when 9.517 g of Fe is allowed to react with 19.34 g of water according to
    14·1 answer
  • How to do Lewis structure for Al?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!