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
Elena-2011 [213]
3 years ago
9

You are working in your laboratory and decide to do some cleaning. You find a test tube with some brown substance congealed at t

he bottom. You take a piece of iron wool to scrub it out, but cannot remove it. You leave the iron wool in the test tube and set it aside to clean your beakers instead. You do not realize the test tube is next to the heater and after a few minutes, a brown gas starts smoking out of the test tube, followed by a reddish-brown gas. Upon observation, the iron wool is coated in a yellow-brown substance. You realize that the mystery substance was
Chemistry
2 answers:
shepuryov [24]3 years ago
6 0

the reddish brown gas is NOX, now you just think the substance reacted with iron is nitrate salt of some metal X......hope you know the Metal X ,,,

Virty [35]3 years ago
5 0

Answer:

The mysterious substance is Nitrogen Dioxide

Explanation:

The mysterious substance is Nitrogen Dioxide in solid form. When heated it releases the reddish-brown gas that has a strong and pungent odor.

It is common to see this gas as a result of the combustion process carried out in thermal plants, especially when the material submitted to combustion is composed of oil or gases. This occurs a lot in many industrial processes and can be seen even in older motor vehicles.

It is important to protect yourself against this gas, because it can cause irritation of the eyes and nose, in addition to pulmonary emphysema, which can be very dangerous.

You might be interested in
Which of the following environments is most likely to have days with a relative humidity of less than 10% (ten percent)?
Anon25 [30]

Answer:

Desert

Explanation:

Desert barely have any water therefore they can barely produce any amount of humidity

6 0
2 years ago
The reduction of aldehydes, ketones, organic acids and their derivative of the process of alcohols is used for
ikadub [295]

Answer:

Widening of blood vessels.

Explanation:

The reduction of aldehydes, ketones, organic acids causes the formation of alcohols that is used for different process in the human body. This alcohol increase the width of the blood vessels as it enters the bloodstream causing greater flow of blood to the skin surface as well as temporary feeling of warmth. It also increased heat loss and rapid body temperature decrease that produces cooling effect in the body.

8 0
2 years ago
3. The temperature of a fixed mass of gas in a rigid container is decreased from 127.00 degrees
Sonbull [250]

Answer:

750mmHg

Explanation:

The following data were obtained from the question:

T1 = 127°C = 127 +273 = 400K

T2 = 27°C = 27 +273 = 300K

P1 = 1000mmHg

P2 =?

P1/T1 = P2/T2

1000/400 = P2 /300

Cross multiply

400 x P2 = 1000 x 300

Divide both side by 400

P2 = (1000 x 300)/400

P2 = 750mmHg

Therefore, the new pressure after cooling is 750mmHg

5 0
2 years ago
Suppose your teacher ask you to separate a mixture of sand and water.Which of the following merhods would u use:distillation fil
MrRa [10]

Answer:

Filtration

Explanation:

Filtration would be best because the sand particles would be trapped in the filter paper and the water would go through so the mixture would be separated

7 0
2 years ago
Write the isotopic symbol for the following (show your work) a) An isotope of iodine whose atoms have 78 neutrons b) An isotope
morpeh [17]

<u>Answer:</u>

<u>For a:</u> The isotopic representation of iodine is _{53}^{131}\textrm{I}

<u>For b:</u> The isotopic representation of cesium is _{55}^{137}\textrm{Cs}

<u>For c:</u> The isotopic representation of strontium is _{38}^{52}\textrm{Sr}

<u>Explanation:</u>

The isotopic representation of an atom is: _Z^A\textrm{X}

where,

Z = Atomic number of the atom

A = Mass number of the atom

X = Symbol of the atom

  • <u>For a:</u>

We are given:

Number of neutrons = 78

Atomic number of iodine = 53 = Number of protons

Mass number = 53 + 78 = 131

Thus, the isotopic representation of iodine is _{53}^{131}\textrm{I}

  • <u>For b:</u>

We are given:

Number of neutrons = 82

Atomic number of cesium = 55 = Number of protons

Mass number = 55 + 82 = 137

Thus, the isotopic representation of cesium is _{55}^{137}\textrm{Cs}

  • <u>For c:</u>

We are given:

Number of neutrons = 52

Atomic number of strontium = 38 = Number of protons

Mass number = 38 + 52 = 90

Thus, the isotopic representation of strontium is _{38}^{52}\textrm{Sr}

3 0
3 years ago
Other questions:
  • What is an energy sublevel
    5·1 answer
  • A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO3)2(aq) , until no further precipitation occurs. The
    8·1 answer
  • What is the wavelength of radio waves that have a frequency of 3.20 x 1010 Hz?
    9·2 answers
  • The quantum mechanical model of the atom
    11·2 answers
  • One example of a chemical used in toothpaste is ________
    7·1 answer
  • What mainly inspired the Europeans to travel the ocean
    11·1 answer
  • What reaction is C+O2=CO2
    9·1 answer
  • 12. An electrolysis reaction is
    15·1 answer
  • C. What is oxidized in the reaction? What is reduced? (2 points)
    15·1 answer
  • I need help with this pls help
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!