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Evgesh-ka [11]
2 years ago
8

Help with my biology

Biology
2 answers:
Ber [7]2 years ago
6 0
For metaphase it’s the second one
liberstina [14]2 years ago
3 0
1. The cell prepares for mitosis.
2. chromosomes line up in the middle of the cell
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A student is collecting the gas produced
marissa [1.9K]

Answer:

0.062 moles of hydrogen gas

Explanation:

We must first out down the reaction equation before we can attempt to solve the problem.

Mg(s) + 2HCl(aq) ----> MgCl2(aq) + H2(g)

Next we obtain the number of moles in 1.5 g of magnesium metal from;

Molar mass of magnesium = 24.3 gmol-1

Number of moles of magnesium= mass/molar mass = 1.5g/24.3gmol-1 = 0.062 moles

From the reaction equation;

1 mole of magnesium metal yields 1 mole of hydrogen gas

0.062 moles of magnesium metal will yield 0.062 moles of hydrogen gas

Therefore, reaction of 1.5g of magnesium metal with excess hydrochloric acid will yield 0.062 moles of hydrogen gas.

7 0
2 years ago
Lab Report PLEASE HELP ME
mina [271]

Answer:

tell me what experiment?

7 0
2 years ago
Ordinary cell division produces two daughter cells that are genetically identical. This type of cell division is important for a
Ratling [72]

Answer:

C) production of sperm and eggs

Explanation:

Sperms and eggs are the male and female gametes respectively. Formation of sperms and egg cells require meiotic cell division. Meiosis in sperm mother cells and egg mother cells reduces the chromosome number of half in the sperms and eggs. Meiosis also adds new gene combinations in these gametes by the process of crossing over.  

Mitosis cannot reduce the chromosome number to half in the sperms and eggs. Absence of crossing over in mitosis leads to the formation of genetically identical progeny cells from mitosis.  

Hence, mitosis can not form sperms and egg cells.  If it does, the sperms and egg cells would not have genetic variations and there would be doubling of chromosome number with each round of sexual reproduction.

8 0
3 years ago
What should you do do prepare for a Matter test?
GuDViN [60]

Answer:

get a cheat sheet like fr

Explanation:

3 0
3 years ago
Read 2 more answers
Hello?? Can anyone help me??! PLEASE
kolezko [41]

Answer:

The temperature is staying the same. In the graph when it shows solid/liquid and liquid/gas, the temperature stays the same until it changes. This is because it reached it's melting point/vaporizing point. For example, a solid gets heated up, it then reaches it's melting point but it can't go higher than that because it isn't fully a liquid yet, once it's a liquid it will then continue to rise in temperature.

I don't think I put enough detail into that explanation but I hope this helps your problem.

4 0
2 years ago
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