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VashaNatasha [74]
3 years ago
14

A solution that is a 4 on the pH scale is a _____. a. weak acid b. strong acid c. weak base d. strong base

Biology
2 answers:
marissa [1.9K]3 years ago
4 0
Ans : It is a. weak acid
DochEvi [55]3 years ago
4 0

Answer: A solution that is a 4 on the pH scale is a (a) weak acid.

The pH scale is a universal measure of how much acidic or basic any substance is. The scale of pH ranges from 0 to 14 with 7 in middle being neutral i.e. neither acidic nor basic. Substances with pH less than 7 are considered to be acidic and more than 7 are considered to be basic. Strong acids have pH less than weak acid while strong bases have higher pH than weak bases.

Substances or solutions that have pH 0-3 are highly acidic, 4-6 are weakly acidic and pH of 7 is neutral solution while pH of 8-11 are weakly basic and 12-14 are highly basic.

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What would a control be for an experiment to see whether fertilizer helps a plant grow ?
shtirl [24]
<span>The control would be a  plant grown without any fertilizer.  This is called  a negative control and is important in identifying the influence  of the treatments on the tests. In this case, it would mean that the plant without fertilizer (control) is not expected to grow as large as in the other treatment. </span>




5 0
3 years ago
Using the information from problem 11, scientists do a further test cross using a heterozygote for height and nose morphology. T
mote1985 [20]

Answer:

The recombinant frequency between T and S is  18%;

The correct Sequence of genes is T-A-S

Explanation:

The table below shows the recombinant frequency between heterozygous height and nose morphology:

Tall-uptrend snout                            40%                            Expected

Dwarf-downtrend snout                   42%                            Expected

Dwarf-uptrend snout                         9%                             Recombinant

Tall-uptrend snout                             9%                             Recombinant

Sum Total                                           100%

To calculate the recombinant frequency; we have :

=9+9

=18%

Hence, the recombinant frequency between T and S = 18%

The determinant of the corect sequence of the genes is  T-A-S

4 0
2 years ago
I dii ok not under stand this please help me!
satela [25.4K]

Answer:Answer:

For 1: The correct answer is Model 1, 2, and 4.

For 2: The correct answer is Option 1.

Explanation:

For 1:

An element has 3 subatomic particles: electrons (E), neutrons (N) and protons (P).

Atomic number is defined as the number of protons or number of electrons.

Atoms having same number of protons are same. From the given models, Model 1, 2 and 4 have 2 protons with different neutrons. Hence, these models belong to same element.

For 2:

A compound is defined as a substance in which two or more types of elements combine in a fixed ratio. For Example:  is a compound made out of atoms of carbon and oxygen.

Hence, the correct answer is Option 2.

7 0
2 years ago
In what structure of the human female body does fertilization most often take place
juin [17]
Being a woman myself, the answer is the Fallopian tubes.
5 0
3 years ago
Read 2 more answers
Why is every offspring unique?
mr Goodwill [35]

Answer:

genetic diversity

Explanation:

because of the alleles in the organisms genotype every offspring has a diffenent trait from each of the partents

3 0
2 years ago
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