Volvox and paramecium live in the same living conditions. The visible difference between volvox and paramecium is
the shape. <span>Volvox is rounded, while paramecium is lying</span>.
NaOH
Na=23
O=16
H=1
SO,NaOH=23+16+1
NaOH=40g/mol
42% of 40=42/100x40
oxygen is the compound
density=mass/volume
1.30=mass/6
mass=7.8g
<h2>Hello!</h2>
The answer is: 
<h2>Why?</h2>
First, we need to calculate the molecular weight of the acetone (CH3COCH3)
So,
Then,
Second, we need to calculate the mass of the acetone in the bottle
We need to remember that 
So,
Third, we need to calculate the number of moles:
Fourth, we need to calculate the number of atoms:
Remember, 
Therefore,
Have a nice day!
When answering this question, you must consider the reactivity series. Mg is much higher than Zn in the reactivity series, therefore it can displace the Zn from the solution - displacement reaction.
It seems odd that you'd react Magnesium nitrate with zinc nitrate. Maybe you meant magnesium with zinc nitrate or vice Versa. Because in your case each compound would remain as it is as both Mg and Zn are happy in a relatively stable compound.
As for magnesium nitrate and magnesium nitrate, you cannot achieve a reaction between two substances that are the same. The same applies for Mg and magnesium nitrate. No displacement happens.
Hope it helps!
The question is located at the end of the page or it is located below the section "with a reference point".
<h3>What is a reference point?</h3>
As explained in the text, this is a known point or location used to describe the location of an object.
<h3>What is a reference point if you want to describe the location of the question on the page?</h3>
In this case, some of the reference points you can use include the other sections in the page or the page itself.
Based on this, two possible locations are:
- The question is located at the end of the page (It uses the page as a reference point).
- The question is located below the section "with a reference point" (it uses a section as a reference point).
Learn more about location in: brainly.com/question/13376711
