To calculate moles from grams using chemical formulas ... However, one mole of magnesium weighs 24.31 g. ... 0.873 g x 95.21 g = 9.17 x 10-3 mol MgCl2.
Answer:
Making oxygen
Oxygen can be made from hydrogen peroxide, which decomposes slowly to form water and oxygen:
hydrogen peroxide → water + oxygen
2H2O2(aq) → 2H2O(l) + O2(g)
The rate of reaction can be increased using a catalyst, manganese(IV) oxide. When manganese(IV) oxide is added to hydrogen peroxide, bubbles of oxygen are given off.
Apparatus arranged to measure the volume of gas in a reaction. Reaction mixture is in a flask and gas travels out through a pipe in the top and down into a trough of water. It then bubbles up through a beehive shelf into an upturned glass jar filled with water. The gas collects at the top of the jar, forcing water out into the trough below.
To make oxygen in the laboratory, hydrogen peroxide is poured into a conical flask containing some manganese(IV) oxide. The gas produced is collected in an upside-down gas jar filled with water. As the oxygen collects in the top of the gas jar, it pushes the water out.
Instead of the gas jar and water bath, a gas syringe could be used to collect the oxygen.
1. Compared to oxygen, nitrogen's __________ makes it more difficult for water molecules to the surround nitrogen molecules.
<span>2. The high solubility of sulfur dioxide can be explained by its ____________. </span>
<span>3. Nitric oxide is more soluble than nitrogen and oxygen because of its _______________. </span>
<span>4. Compared to nitrogen, the ___________ of ethylene makes it more soluble in water. </span>
<span>CHOICES are: </span>
<span>a. shorter bond length </span>
<span>b. ability to react with water </span>
<span>c. larger molecular size </span>
<span>d. polarity
answers: </span><span>a, b, d, c.</span><span>
</span>
CO2
The symbol how you write
C. Sugar is the solute and water is the solvent since sugar is the one dissolving and water is what the sugar is dissolving in.
