CHEMISTRY MIDDLE SCHOOL

What characteristic do most aquatic plants have in common?A) stems with lots of thorns to fight off predator
B) Can survive without sunlight
C) Can survive with little water
D) Flat leaves for floating in water

Answers

Answer 1
Answer: D) Flat leaves for floating... no plants can survive with out sunlight
Answer 2
Answer: they can survive with out sunlight

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How many sex chromosomes would be present in an individual with 80 chromosomes?A)2
B)1
C)39
D)40

Answers

Answer:

D) 40

Explanation:

The number of sex chromosomes in an organism is half the number of chromosomes the individual has.

So if the individual has 80 chromosomes, they’ll have 80/2 =40 sex chromosomes.

Answer:

A)2

Explanation:

1a) 2 properties that glass and plastic always share1b) 2 properties that glass and plastic sometimes share
2) What advantages do bottles made from plastic have?
3) What disadvantages are there when you use plastic bottles?
4) Why are plastic bowls not used for heating on a cooker?
5) What are the disadvantages of using metal for a toy for a baby?
6) Why is plastic often used for children's toys?
7) What properties would you look for in materials to make a kite?

Answers

1a) malleable and rigid
1b) ??
2) recyclable and reusable
3) plastic from crude oil and the process of fractional distillation to obtain plastic pollutes and harmful chemicals can be used when making the bottles
4) because the plastic will melt
5) it can rust 
6)lightweight, is malleable so can be easily shaped 
7) Lightweight materials so it can take off through the wind


Hope the helps xxx

Answer:

1a) Chemical inertness

1b) transparency

2) extremely less brittle

3) they can melt very easily under moderate heat.

4) they have low melting point

5) metals are hard, meaning they can easily injure a baby. Metals are good absorbers and radiators of heat.

6) they are less hard when compared to metals so they are less probable to cause injuries to kids.

7) material with very low density.

How can an organism have the same phenotype, but different genotypes?

Answers

Yes, an organism can have the same phenotype but different genotypes.
Genotype is the genetic makeup.
Phenotype is physical appearance.

Alleles are forms of a gene. ex. Brown eyes are dominant over blue eyes. Blue eyes are recessive.

Balance the chemical equation. ___Mg + ___Fe2O^3 -> ___MgO + ___Fe

Answers

Answer:

3Mg + Fe₂O₃ → 3MgO + 2Fe.

Explanation:

  • To balance the equation, you should apply the law of conservation of mass for the equations.
  • The law of conservation of mass states that the no. of each atom is equal in both sides (reactants and products).
  • The balanced equation is:

3Mg + Fe₂O₃ → 3MgO + 2Fe.

That 3.0 mole of Mg react with 1.0 mole of Fe₂O₃ to produce 3.0 moles of MgO and 2.0 moles of Fe.

  • The no. of all atoms is the same in both of reactants and products side.

Mg (3), Fe (2), and O (3).

I’m which of the following kingdoms are prokaryotes found?i need help ASAP please help

Answers

Don’t Put this as your answer

How can you read a determine the masses

Answers

I need you to explain the question
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