Answer:
B) conducts electricity
Explanation:
Metals are conductors, literally meaning they conduct electricity.
One metal is liquid at room temp (there might be one more but I only know of mercury).
The reactivity depends on the placement in the periodic table.
If it conducts electricity, it can't be an insulator.
Answer:
Chlorine can be found in Period 3.
Explanation:
Periods on the periodic table are the rows (horizontal sections) that group elements together. By looking across Period 3, you will find Cl (chlorine).
Answer:
3.76 g of O₂ are needed to produced 12.5 g of Fe₂O₃
Explanation:
The reaction is: 4Fe (s) + 3O₂ (g) → 2Fe₂O₃ (s)
4 moles of iron react to 3 moles of oxygen in order to produce 2 moles of iron (III) oxide.
Let's determine the moles of the produced product.
12.5 g . 1mol/ 159.69g = 0.0783 moles
If we assume Iron in excess, we work with the oxygen.
2 moles of Fe₂O₃ are produced by 3 moles of oxygen
Then, 0.0783 moles of Fe₂O₃ might be produced by (0.0783 . 3)/2
0.117 moles.
We convert the moles to mass → 0.117 mol . 32 g/1mol = 3.76 g
Answer:
Element.
General Formulas and Concepts:
<u>Chemistry</u>
- Reading a Periodic Table
- Diatomic Elements
Explanation:
Diatomic Elements are elements that are bonded to themselves. Naturally, these elements are not found alone in nature.
Diatomic Elements:
Hydrogen
Nitrogen
Oxygen
Fluorine
Chlorine
Bromine
Iodine
Since Nitrogen is a diatomic element, we would find Nitrogen in nature as N₂.
Answer:- 3400 balloons
Solution:- Originally the helium gas is at 170 atm pressure and there are 44.0 L of it. The pressure of the balloon filled by this has is 1.1 atm and the volume is 2.0 L. Let's first calculate the pressure of helium gas at 1.1 atm of pressure using Boyle's law, "At constant temperature, the volume of the gas is inversely proportional to the pressure."
The equation used for this is:
= 170 atm
= 1.1 atm
= 44.0 L
= ?
Let's plug in the values and solve this for .
= 6800 L
Now, 44.0 L of the gas is remaining in the exhausted cylinder at 1.1 atm of pressure.
So, the volume of the gas used to fill the balloons = 6800 L - 44.0 L= 6756 L
2.0 L is the volume of one balloon filled by the helium gas. 6756 L would be the volume of how many balloons?
We could easily solve this on dividing the above calculated total volume used to fill the balloons by the volume of one balloon.
= 3378 balloons
The answer is asked to be reported with two sig figs, so it could be written as 3400 balloons.
Hence, 3400 balloons could be filled by the helium gas.
