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
Sedbober [7]
3 years ago
12

Hiw many energy is needed to melt 4.24 grans of pd?

Biology
1 answer:
Usimov [2.4K]3 years ago
3 0
686.8 j is needed to burn 4.24 grans of pd.
You might be interested in
Which of the following statements is true?
Paladinen [302]

D, all of the above. Your body sweats when it gets too hot to cool the body, and shivers when it gets too cold to heat the body. The nervous system is responsible for sensing everything in and around the body.

6 0
3 years ago
The human GM-CSF gene and the mouse GM-CSF gene vary by more than 60% in their DNA sequence. However, when scientists place the
baherus [9]

Answer:  The resulting proteins made by the human gene are similar to the proteins made by the mouse gene.

Just took the test.

5 0
3 years ago
Read 2 more answers
To test for protein, you added Biuret solution and
OLEGan [10]

Answer:

Water sample showing pink/purple color is an error.

Explanation:

Biuret is a blue color reagent that changes its color to pink/purple whenever it detects protein in a sample. Water don't contain proteins so it should not show pink/purple color instead it should maintain the blue color. Food items generally contain proteins so it show pink/purple color but it showed blue color.

Error might have caused by wrong marking of the samples, test tube marked with Water might contain a mystery food while Mystery food tube might contain water.

7 0
3 years ago
Read 2 more answers
Which answer best describes an O3 molecule?
Oksana_A [137]
Its 3 of the same molecule.
7 0
3 years ago
Substance A and substance B are mixed together. To separate the mixture, water is added, and substance A is filtered out. Then,
Sveta_85 [38]

The correct answer would be that substance A is rice, and substance B is sugar.

For substance A to be filtered out, it means that A is a water-insoluble substance and for substance B to be recoverable by evaporating off the water, it means that B is water-soluble.

Thus, A can neither be sugar nor alcohol because neither can be recovered by filtration. Also, B can neither be coffee nor alcohol because they can not be recovered as residue through evaporation of water.

Therefore, the only correct answer is that substance A is rice, and substance B is sugar because rice can be filtered out from water while the water-soluble sugar can be recovered by evaporating the water.

More about separating mixtures here: brainly.com/question/2827008

6 0
3 years ago
Other questions:
  • "STx-producing bacteria cause over a million deaths a year, but treatment with antibiotics is not effective"
    10·1 answer
  • Wendy wants to know which colors of light are emitted by her flashlight. Which tool could help her? A. A psychrometer B. A laser
    7·2 answers
  • Why is there so much variation within families
    5·1 answer
  • The heat transfer depicted in the image is MOST likely
    7·2 answers
  • Please help! Of the skulls below, which one shows the most evidence of upright walking?
    12·2 answers
  • on the elctromagnetic spectrum, what waves have wavelengths longer than the wavelengths of visible light
    5·1 answer
  • Which of the following can affect the activity of enzymes?
    10·2 answers
  • Check all of the BIOTIC factors in an ecosystem. <br><br> THE SUN<br> TREES<br> ANIMALS<br> PLANTS
    8·1 answer
  • Which statement best describes why water is an effective solvent?
    12·1 answer
  • A sample compound with a molar mass of 34.00g/mol is found to consist of 0.44g H and 6.92g O. Calculate both empirical and molec
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!