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Dmitriy789 [7]
3 years ago
8

Which of the following statements about compounds is false?

Biology
2 answers:
tresset_1 [31]3 years ago
6 0
I think that would be A! Hope i helped :)
ICE Princess25 [194]3 years ago
5 0

The right option is; A. Compounds can be separated by physical methods.

Compounds can be separated by physical methods is the statement about compounds that is false.  

A compound is a molecule that is formed from the combination of two or more different chemical elements. The atoms of the different elements that form a compound are held together by chemical bonds (covalent and ionic) that are not easy to break. The component of a compound can only be separated by chemical means and not by physical methods. An example of a compound is water (H2O) which is composed of hydrogen (H) and oxygen (O) atoms.



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if an element has a half-life of 30 million years and there is 12.5% of it remaining in a rock, how old is that rock
Assoli18 [71]

Answer:

The half-life of a substance is the amount of time it takes for half of that substance to decay. However, after two half-lives, half of the half remaining will decay, leaving you with one quarter of the original substance.

So, after 1 million years you will have 50% of the original substance remaining.

And, after 2 million years you will have 25% of the original substance remaining.

After 3 million years you will have 12.5% of the original substance remaining.

And after 4 million years you will have 6.25% of the original substance remaining.

Explanation:

Hope it helps:)

3 0
3 years ago
Water is important in are diets because
mixer [17]
Water is important because, it's a part of all bodily functions
8 0
3 years ago
the mutation of the brca1 gene normally functions to ensure? a)breast cancer cells duplicate b)suppress tumor function c)the per
DedPeter [7]
I believe the answer is B!
3 0
3 years ago
A 0.15-kilogram baseball moving at 20 meters per
AleksAgata [21]

Answer:

300N

Explanation:

Impulse= Mass * Velocity

F.T = M * V

F= MV/T

F= (0.15*20)/ 0.01

F= 300N

4 0
3 years ago
Why does a deletion mutation usually cause more defects during protein synthesis than a point mutation?
BARSIC [14]
Answer: B

WHY?
Deletion mutation may cause a shift of base sequence, causing the reading frames for base sequence to change during translation. This may affect the type of amino acid it the original base sequence codes for, resulting in a change in amino acid sequence in the polypeptide translated. Therefore, affecting the whole protein itself. There may be wrong amino acids that prevents vital bonds like disulfide bridges to form, resulting in a huge change in 3 dimensional conformation of the protein. A point mutation may result in a gene sequence being edited. However, only the target sequence is being mutated. The rest of the gene sequences are left untouched. Therefore, the impact is localised. This ensures that even though a few wrong amino acids may be in the polyleptide, most of the bonds that are crucial for the correct 3 dimensional conformation is still present, therefore, lesser defects will be resulted due to point mutation as compared to deletion mutation.
5 0
3 years ago
Read 2 more answers
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