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
klio [65]
2 years ago
13

a sample of double-stranded dna contains 42% cytosine. approximately what percent of the nucleotides in this sample will be thym

ine?
Chemistry
1 answer:
Simora [160]2 years ago
7 0

Answer:

8% thymine

Explanation:

You might be interested in
The mole is defined as the amount of a substance containing the same number of particles as exactly 12 g of C-12. The amu is def
Pavlova-9 [17]

Answer:

Because it wouldn't make any sense

Explanation:

First of all, I think it's important to highlight the definition of isotope.

Isotope (Wikipedia): Variants of a particular chemical element <u>which differ in neutron number</u>...

This means that two isotopes are the same element but have different net mass per atom, due to the different number of neutrons.

Therefore, it's important to make the definition on the same isotope so that the proportion is equal. If the definition would be made on different isotopes, the proportion wouldn't have any sense. Let me be clear with this example:

mass in grams of a C-12 atom = 1.9944235 × 10 ^ -23 g  --> this is the mass of a single C atom.

By definition --> 1 mol of anything = 6.02 x 10 ^ 23 particles of anything

Therefore, we know how much a single C atom weights. How many grams do you think that 6.02 x 10 ^ 23 atoms of C (i.e a mol of C) could weight??

1 single C atom ----------------------------- 1.9944235 × 10 ^ -23 g

6.02 x 10 ^ 23 atoms of C   ------------ <u>12.006 g  !!</u>

These 12 g is the same quantity than above! Therefore, 1 mol of C weights 12 g. If the definition were made with 13 g of C-13 (the other C isotope), these numbers will not be the same --> There would be a contradiction.

Regarding the second question, we need to search Ne-20 atomic mass in grams -->  3,3509177 × 10 ^ -23 g

Hence, if we follow the same rule, the amu would be 1/12 of Ne-20.

[ 3,3509177 × 10 ^ -23 g ] / 12 = 2.79 ^ -24 g

3 0
3 years ago
How many protons, electrons, and neutrons does an atom with atomic number
sergey [27]

Answer:

protons : 10

electron : 10

neutron : 10

Explanation:

Protons will usually be the same as the electrons when its a <u>Atom</u> (when its a ion or covalent bond or simple bond they will most likely be different)

the atomic number represents protons and electrons

the mass number - the atomic number = neutron

8 0
2 years ago
Which of the two substances would have the higher boiling point ch4 or c?
kifflom [539]
Carbon has a higher boiling point.
6 0
3 years ago
A small positively charged ball is moved closer to a large, positively charged ball. which describes how the small ball likely r
tankabanditka [31]

Answer:

This is just my guess, but since opposites attract, then im guessing that alikes repel each other. So, they will go away from each other when the ball is released (I think).

Explanation:

Hope this helps! If it did, please mark it as brainliest! It would help a lot! Thanks! :D

7 0
2 years ago
What electives should i take in highschool to prepare to take criminology?
dybincka [34]

Answer:

depending on what school you go to and what classes you are allowed to take in which grades, you should take forensics.

4 0
2 years ago
Other questions:
  • ANALYZE A ball of clay is manipulated into different shapes in each of the images
    9·1 answer
  • Why is it necessary to be able to replicate the results of a scientific experiment
    14·1 answer
  • Money management becomes more important when you are responsible for paying all your own expenses.
    9·2 answers
  • The bond formed when electrons are shared is called a(n) _____.
    10·2 answers
  • You believe you have cracked a secret code that uses elemental symbols to spell words. The code uses numbers to designate the el
    10·1 answer
  • 1. What is a chemical reaction?
    15·1 answer
  • Derek needs a tool that delivers 25.00 mL of a sodium hydroxide solution. What tool would be best for him to use?
    9·1 answer
  • What is the speed of a wave with a wavelength of 3 m and a frequency of .1hz?
    5·1 answer
  • Which brain area is involved in her emotional response
    6·1 answer
  • What document, signed by the district attorney, authorizes the search of a building for the purpose of collecting evidence at a
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!