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3 years ago

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Explain the composition of dna nucleotides and the structure of the dna molecule need help

1 answer:

Kaylis [27]3 years ago

4 0

A nucleotide is composed of a phosphate group, sugar, and nitrogen base. DNA is made of 2 strands of nucleotides linked together by covalent bonds between the phosphate and sugar of each nucleotide. The strands of nucleotides are linked together by hydrogen bonds creating DNA. Hope this helps and sorry if I made a mistake.

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Given the following equation: 3Cl2 (g) + 8NH3 (g) → N2 (g) +

Alona [7]

Answer:

16 mol

Explanation:

3Cl2 (g) + 8NH3 (g) → N2 (g) + 6NH4Cl (s)

from reaction 8 mol 6 mol

given x mol 12 mol

8 : x = 6 :12

6x = 12*8

x = 12*8/6 =16 mol

4 0

2 years ago

How many electrons are in 0.990 oz of a pure gold coin?

sleet_krkn [62]

Atomic number of gold, $Au$ = 79 means there are 79 electrons in per atom of gold.

Atomic mass of gold = 196.967 gm

0.990 oz of gold is given.

Now, converting $oz to gm$

$1 oz = 28.3495 gm$

So, $0.990 oz = 0.990\times 28.3495 gm = 28.066 gm$

Now, for determining the number of moles, the formula for number of moles is:

$number of moles = \frac{given mass}{Molar mass}$

Substituting the values:

$number of moles = \frac{28.066}{196.967} = 0.1425 mole$

1 mole of $Au = 6.022\times 10^{23} atoms of Au$

So, for 0.1425 mole of $Au = 6.022\times 10^{23}\times 0.1425 atoms of Au = 0.8581 \times 10^{23} atoms of Au$

Since 1 atom of gold has 79 electrons so,

Number of electrons = $0.8581 \times 10^{23}\times 79 = 67.7899\times 10^{23} electrons$

So, number of electrons in 0.990 oz of pure gold coin is $67.7899\times 10^{23}$ .

7 0

3 years ago

How many moles of potassium K will react with 3 moles of sulfur S?

IceJOKER [234]

Explanation:

KOH + 2H2SO4 ======> 2K2SO4 + H20

$3 \: mol \: s \: \times \: \frac{4 \: mol \: k}{2 \: mol \: s} \: = 12 \: mol \: k$

7 0

3 years ago

What atom has 19 protons and 20 neutrons

Over [174]

Potassium Does! Hope that helps

3 0

2 years ago

Read 2 more answers

Which of the following most likely happens when the number of particles of a gas decreases?

Papessa [141]

Answer: C. The number of collisions of gas particles decreases

Explanation: As temperature decreases so does everything else same with increase.

3 0

2 years ago