4 years ago

Because ________ change the identity of the substances involved, they are hard to reverse

1 answer:

4 0

Chemical is the answer to the question, but nuclear could also be a valid one since it is nearly impossible to reverse that.

You might be interested in

What is oxidation in the case of electrons??

leonid [27]

Answer:

losing electrons and gaining positive charges. atoms that lose electrons were oxidized

Explanation:

6 0

3 years ago

When a nonmetal bonds with a nonmetal it is a _ bond

Karolina [17]

It is a covalent bond

3 0

4 years ago

Which element in the 18th column of the periodic table has the largest radius?

aivan3 [116]

Radon. As you move down a group in the periodic table you essentially add new energy levels to the one above it, making the atom larger.

6 0

3 years ago

Which of these is not an organism humans,mold,bacteria,lungs

mina [271]

A lung is not a organism

5 0

3 years ago

Read 2 more answers

If a red blood cell is 100% saturated, how many molecules of O2 are bound to it?1 billion molecules of O24 molecules of O2250 mi

kondor19780726 [428]

Answer:

1 billion molecules O₂

Explanation:

From my research, a human red blood cell contains approximately 270 million hemoglobin molecules.

A hemoglobin molecule contains four heme groups, <em>each of which has an iron ion forming a coordination complex that carries every dioxygen molecule. </em>Therefore for each hemoglobin molecule, we will have 4 dioxygen molecules. The heme groups are responsible for the transport of every dioxygen and other diatomic gases.

Hence, the number of O₂ molecules in a red blood cell saturated with 100% will be:

$\frac{270 \cdot10^{6} hemoglobine molecules}{1 red blood cell} \cdot \frac{4 heme group}{1 hemoglobine molecule} \cdot \frac{1 O_{2} molecules}{1 heme group} = 1 \cdot 10^{9} O_{2} \frac{molecules}{red blood cell}$

So, the correct answer is 1 billion of O₂ molecules.

Have a nice day!

8 0

3 years ago