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ipn [44]
3 years ago
11

Which of these is the balanced equation for this reaction

Biology
2 answers:
VikaD [51]3 years ago
8 0

A is your answer.  it cant be B because H doesn't equal 2 on both sides.it cant be C because S doesn't equal 3 on both sides of the equation . It also cant be D because Au doesn't equal 3 on the first part of the equation so your best answer is A. Hope this helps!!!!

ch4aika [34]3 years ago
7 0

Explanation:

A balanced equation is defined as the equation where number of atoms of the reactant equal to the number of atoms of the product.  

This also means that mass of the reactants is equal to the mass of products in a chemical equation.

For example, Au_{2}S_{3} + 3H_{2} \rightarrow 2Au + 3H_{2}S

Here, number of atoms on reactant side are as follows.

  • Au = 2
  • S = 3
  • H = 6

Number of atoms on product side are as follows.

  • Au = 2
  • S = 3
  • H = 6

Hence, the number of atom of reactant side are equal to the number of atoms on product side.

Therefore, the reaction equation Au_{2}S_{3} + 3H_{2} \rightarrow 2Au + 3H_{2}S is a balanced equation.

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Imagine that a newly discovered, recessively inherited disease is expressed only in individuals with type O blood, although the
erastova [34]

Complete question:

Imagine that a newly discovered, recessively inherited disease is expressed only in individuals with type O blood, although the disease and blood group are independently inherited.

A normal man with type A blood and a normal woman with type B blood have already had one child with the disease. The woman is now pregnant for a second time.

Assuming that both parents are heterozygous for the gene that causes the disease, what is the probability that the second child will also have the disease? Express your answer as a fraction using the slash symbol and no spaces (for example, 1/2).

Answer:

The probability that the second child will also have the disease is 1/16.

Explanation:

<u>Available data:</u>

  • Two genes independently inherited: one for blood type, the other for disease
  • Man with type A blood  x  Woman with type B blood
  • Both parents are heterozygous for the gene that causes the disease; Dd

If the man has A blood, and the woman has B blood, and they already have an affected child, this means that they must be heterozygous for blood type too.

Cross:  

Parentals)           AiDd         x      BiDd

Gametes)  AD  Ad  iD  id       BD  Bd  iD  id

Punnett square)      AD       Ad       iD       id

                     BD   ABDD  ABDd  BiDD BiDd

                     Bd   ABDd   ABdd   BiDd Bidd

                     iD    AiDD    AiDd    iiDD   iiDd

                     id    AiDd     Aidd     iiDd    iidd

F1) <u>Genotype</u>:

1/16 ABDD

2/16 ABDd

1/16 ABdd

1/16 AiDD

1/16 BiDD

2/16 AiDd

2/16 BiDd

1/16 Aidd

1/16 Bidd

1/16 iiDD

2/16 iiDd

1/16 iidd

<u>Phenotype:</u>

3/16 A/B normal

4/16 A normal

4/16 B normal

3/16 0 normal

1/16 0 affected by the disease.

3 0
3 years ago
Dose DNA have cells <br><br><br> i need to know for a assingment
kiruha [24]

Answer and Explanation:

Cells are made of DNA (Deoxyribonucleic Acid).

They provide the genetic instructions for making and forming a cell.

The DNA is found inside the nucleus of the cell.

Because the cell is very small, and because organisms have many DNA molecules per cell, each DNA molecule must be tightly packaged. This packaged form of the DNA is called a chromosome

DNA do NOT have cells, but cells DO have DNA.

<em><u>#teamtrees #PAW (Plant And Water)</u></em>

7 0
3 years ago
Which of the following statements is TRUE about geographic isolation?
jolli1 [7]

Answer:

d. all of the above

Explanation:

Geographic means anything to do with the terrain or land. Isolation can happen for any amount of time, so you never know what the new population might be.

3 0
3 years ago
Who first identified nucleic acids, and where were they discovered?
Varvara68 [4.7K]

Answer:

A

Explanation:

He discovered them in 1868. I hope this helps:)

6 0
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A bumblebee buzzes past you at 3 m/s. The frequency of the hum made by its wings is 152 Hz. Assume the speed of sound to be 342
monitta

ojshqqjq

Explanation:

hope it helps

3 0
3 years ago
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