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
Andrei [34K]
3 years ago
11

Why methylene blue is blue

Chemistry
1 answer:
bixtya [17]3 years ago
7 0

Methylene blue indicates the presence of oxidizing agents because it is oxidized itself by these compounds. When electrons are stripped from methylene blue, the resulting molecule imparts a blue color to the solution--giving a clear sign of a chemical change.

You might be interested in
What is 1.5 x 10^3 in standard notation
LUCKY_DIMON [66]
1500 just move the decimal to the right three times because its a positive <span />
6 0
3 years ago
When science is used to create a new instrument, such as a cell phone, we say that a new ___________ has been developed.
kari74 [83]
Is it Technology? What have you already tried?
3 0
3 years ago
A 6.000L tank at 19.2°C is filled with 18.0g of carbon monoxide gas and 10.6g of chlorine pentafluoride gas. You can assume both
Jobisdone [24]

Answer:

Total pressure: 2.89 atm

Mole fraction CO: 0.88

Partial pressure CO: 2.56 atm

Mole fraction ClF₅: 0.12

Partial pressure ClF₅: 0.33 atm

Explanation:

We should apply the Ideal Gases Law to solve this:

P . V = n . R . T

We need n, which is the total moles for the mixture

Total moles = Moles of CO + Moles of ClF₅

Moles of CO = mass of CO / molar mass CO → 18 g/28 g/mol = 0.643 mol

Moles of ClF₅ = mass of ClF₅ / molar mass ClF₅ → 10.6g/ 130.45 g/m = 0.0812 mol

0.643 mol + 0.0812 mol → 0.724 moles in the mixture

So we have the total moles so with the formula we would know the total pressure.

P . 6L = 0.724 mol . 0.082L.atm/mol.K . 292.2K

P = ( 0.724 mol . 0.082L.atm/mol.K . 292.2K) / 6L

P = 2.89 atm

Mole fraction is defined as the quotient between the moles of gas over total moles, and it is equal to partial pressure of that gas over total pressure

Moles of gas X /Total moles = Partial pressure of gas X/Total pressure

(Moles of gas X / Total moles) . Total pressure = Partial pressure of gas X

Mole fraction CO = 0.643 / 0.724 = 0.88

Partial pressure CO = 0.88 . 2.89 atm → 2.56 atm

Mole fraction ClF₅ = 0.0812 / 0.724 = 0.12

Partial pressure ClF₅ = 0.12 . 2.89 atm → 0.33 atm

5 0
3 years ago
PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
malfutka [58]

Answer: I think G.

Explanation:

8 0
3 years ago
Read 2 more answers
Aluminum has a density of 2.70 g/mL. Calculate the mass (in grams) of a piece of aluminum having a volume of 264 mL .
gavmur [86]
The formula for density is:

D = m/v

We can use the formula to figure out the mass because we already know two of the three values (we are given the density and volume), so we only have to solve for <em>m. </em>If we plug our given values into the formula, we get:

2.70 = m / 264

Now, all we need to do is solve for <em>m</em>. The goal is to get <em>m</em> on one side of the equation, and all we have to do is multiply each side of the equation by 264:

264 × 2.70 = (m÷264) × 264

264 × 2.70 = m

m = 712.8

The mass of the piece of aluminum is 712.8 grams.
4 0
3 years ago
Other questions:
  • How many significant figures the measurement have 56.0g 0.0004m 1003ml 0.0350s
    13·1 answer
  • What can be impacted by geomagnetic storms?
    15·1 answer
  • Use the law of constant composition to complete the following table summarizing the amounts of iron and chlorine produced upon t
    9·2 answers
  • A green laser pointer emits light with a wavelength of 542 nm. What is the frequency of this light?
    15·1 answer
  • Propose a reason why very few 2+ ions are formed in a mass spectrometer
    8·1 answer
  • Plant Pigments and Photosynthesis
    12·1 answer
  • A 25.888 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 73.464 g of wa
    6·1 answer
  • The way molecules in a substance move around each other
    9·1 answer
  • Energy that is lost as heat
    9·1 answer
  • Which of these equations is balanced? (Select all that are correct)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!