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
mote1985 [20]
3 years ago
15

Who is credited with creating the first accurate model of DNA

Chemistry
2 answers:
Temka [501]3 years ago
7 0

Answer:James Watson and Francis Crick are credited with creating first accurate model of DNA.

Explanation:

kupik [55]3 years ago
7 0

Answer:

Watson & Crick.

Explanation:

You might be interested in
3. Write DISSOCIATION or IONIZATION equations for the following chemicals:
Romashka [77]

Answer:

a) HNO3 -> H+ + NO3- disassociation of Nitric Acid; to yield a Nitrate ion and a Proton, H+, or as a Hydronium ion H3O+

b) H2S04 -> Disassociation of Sulfuric Acid; simple way- 2H+ + SO4- -

c) H2S hydrogen sulphide in water is an acid; thus H+ HS- disassociation.

d) NaOH -> dissociation of Na+ + OH-; this is complete; sodium hydroxide is deliquescent, meaning it will draw water - EVEN from the air! Strong Base

e) Na2CO3 -> 2Na+ CO3- - Ionization of sodium carbonate - a salt

f) Na2S04 -> 2Na+ + SO4 - - ionization of sodium sulphate - a salt

g) NaCl​ -> Na+ + Cl- ionization of the salt, Sodium Chloride

Explanation:

Salts ionize at different rates; acids or bases dissociate; these are mostly strong acids and NaOH, a strong base.

8 0
3 years ago
uyty7trrhgr sjkrvhvdvhv idlhasg iaiosg sidrug iowyhg eiroygiyega riyh aeoirgv aeyg reioaaioeyr goirfoiyer goiag oare5iphq vouptr
Vilka [71]

Answer:

what does this mean lol

Explanation:

?

6 0
3 years ago
What volume, in mL, of carbon dioxide gas is produced at STP by the decomposition of 0.242 g calcium carbonate (the products are
damaskus [11]

Answer:

54.21 mL.

Explanation:

We'll begin by calculating the number of mole in 0.242 g calcium carbonate, CaCO3.

This is illustrated below:

Mass of CaCO3 = 0.242 g

Molar mass of CaCO3 = 40 + 12 +(16x3) = 40+ 12 + 48 = 100 g/mol

Mole of CaCO3 =?

Mole = mass /Molar mass

Mole of CaCO3 = 0.242/100

Mole of CaCO3 = 2.42×10¯³ mole.

Next, we shall write the balanced equation for the reaction. This is given below:

CaCO3 —> CaO + CO2

From the balanced equation above,

1 mole of CaCO3 decomposed to produce 1 mole CaO and 1 mole of CO2.

Next, we shall determine the number of mole of CO2 produced from the reaction.

This can be obtained as follow:

From the balanced equation above,

1 mole of CaCO3 decomposed to produce 1 mole of CO2.

Therefore,

2.42×10¯³ mole of CaCO3 will also decompose to produce 2.42×10¯³ mole of CO2.

Therefore, 2.42×10¯³ mole of CO2 were obtained from the reaction.

Finally, we shall determine volume occupied by 2.42×10¯³ mole of CO2.

This can be obtained as follow:

1 mole of CO2 occupies 22400 mL at STP.

Therefore, 2.42×10¯³ mole of CO2 will occupy = 2.42×10¯³ x 22400 = 54.21 mL

Therefore, 54.21 mL of CO2 were obtained from the reaction.

7 0
3 years ago
Identify the element from its location on the periodic table:<br><br> a. 4p^5
mafiozo [28]
The element is Bromine
3 0
3 years ago
Which of the following is not a trait of gases?
iVinArrow [24]
<span>d. tightly packed particles</span>
7 0
2 years ago
Read 2 more answers
Other questions:
  • An acid-base titration is a neutralization reaction performed to determine: the concentration of an unknown acid based upon the
    11·1 answer
  • A student calculates the mass of a piece of copper to be 8.3 grams. The actual mass of the copper is 10. grams. What is the perc
    10·1 answer
  • What is the mass of 2.56 × 10–4 moles of Fe2O3? : 6.23 × 105 159.6 g 1.60 × 0–6 g 4.09 × 10–2 g
    9·1 answer
  • Unknown element has two isotopes. Isotope A has a mass of 34 amu and abundance of 52%, isotope B has a mass of 33 amu and abunda
    12·1 answer
  • Which statement would support a merit of the Bronsted-Lowry base theory has over the Arrhenius base theory?
    6·2 answers
  • Arrange He,Br2 and NaCl in increasing boiling point and explain why
    7·1 answer
  • Help!!
    12·2 answers
  • What % of original U238 remains after three half lives?<br> 1-50<br> 2-25<br> 3-12.5<br> 4-6.25
    15·1 answer
  • 54:63 ratio simplest form?
    11·1 answer
  • 4. Which statement correctly explains why hydrogen fluoride dissolves in water?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!