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
astraxan [27]
3 years ago
13

Which organ is NOT a part of the excretory system? *

Chemistry
2 answers:
Ierofanga [76]3 years ago
5 0

Answer:

brain

Explanation:

pishuonlain [190]3 years ago
3 0

Answer:

D. BRAIN

Explanation:

The human excretory system includes the lungs, the skin, and the urinary system (kidneys, ureters, bladder, and urethra).

You might be interested in
Plsss help ASAP Dont guess
alexira [117]

Answer:

B

Explanation:

5 0
2 years ago
Read 2 more answers
Ap chemistry how to determine if compound is ionic or molecular bqsed on formula
ludmilkaskok [199]
Ionic compound consists of a positively charged ion and a negatively charged anion. For example, NaCl. Na (sodium) is a cation (another word for positively charged ion) and Cl (chloride) is a anion (another way for negatively charged ion.)

Molecular compounds consists of only negatively charged ions. For example Br2I is a compound of 2 elements that are negatively charged.

Unlike ionic compounds, molecular compounds consists of two or more negatively charged elements.  
7 0
3 years ago
what would you observe if you used a ballpoint pen instead of a pencil to mark the chromatography paper?
sveticcg [70]

Answer:

It basically messes up the results

Explanation:

Pen ink consists of resins, pigments and other colouring dyes dissolved in appropriate solvents like propylene glycol, propyl alcohol and some other ethers. If the ball point pen is used to mark on the chromatography paper then these pigments will also move along with the solvent and interfere with the spots of our analyte.

If you use a ball point pen when doing a chromatogram, then the ink would separate as it is a mixture and run down the paper.

Graphite, or pencil lead however, is not an organic material and therefore will not be affected by common organic solvents used for thin-layer chromatography. Pen ink on the other hand will be readily absorbed by the solvent and will move up the plate.

3 0
3 years ago
How many moles of nitrogen trifluoride (NF3) can be produced from 9.65 mole of Fluorine gas (F2)
user100 [1]

Answer:

6.43 moles of NF₃.

Explanation:

The balanced equation for the reaction is given below:

N₂ + 3F₂ —> 2NF₃

From the balanced equation above,

3 moles of F₂ reacted to produce 2 moles of NF₃.

Finally, we shall determine the number of mole of nitrogen trifluoride (NF₃) produced by the reaction of 9.65 moles of Fluorine gas (F₂). This can be obtained as follow:

From the balanced equation above,

3 moles of F₂ reacted to produce 2 moles of NF₃.

Therefore, 9.65 moles of F₂ will react to to produce = (9.65 × 2)/3 = 6.43 moles of NF₃.

Thus, 6.43 moles of NF₃ were obtained from the reaction.

4 0
3 years ago
What happens when a nitrogen molecule is formed from two nitrogen atoms?
Helga [31]

Answer:

They form a covalent bond

6 0
3 years ago
Read 2 more answers
Other questions:
  • HELP PLEASE !!!!! which of the following molecules has a bent shape
    12·2 answers
  • Calculate the average mass for iron. 15.2% iron-55, 85.8% iron-56
    7·1 answer
  • Are the bonds that chlorine forms with sodium (to form NaCl) and with carbon (to form CCl4) the same in both compounds?
    5·1 answer
  • Lewis structures for the perchlorate ion (ClO4−) can be drawn with all single bonds or with one, two, or three double bonds. Dra
    15·1 answer
  • At STP fluroine is a gas and iodine is a solid, this observation can be explained by the fact fluroine has a .. ?
    8·1 answer
  • Niehls Bohr, proposed that electrons must have enough energy to keep them in constant circular motion, which enables them to
    10·1 answer
  • Amateur radio operators in the United States can transmit on several bands. One of those bands consists of radio waves with a wa
    6·1 answer
  • You have a volumetric flask containing 0.54 M HBr. The SOLUTE is HBr and the SOLVENT is water.
    9·1 answer
  • Please help!
    11·1 answer
  • Lake Baikal in Siberia is the largest freshwater body on Earth by volume, at 5666 mi³
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!