A is the answer. I hope this helps
Explanation:
Copper and aluminum are used for electric wires and cables because they are readily available and cheaper to produce.
The abundance of copper and aluminum is higher compared to silver and gold.
This makes the metals easier to mine than silver and gold. It would be impossible to use the scare amount of gold and silver to make electric wires and cables.
This use cannot be sustained.
Answer: The new pressure is 0.509 atm
Explanation:
The combined gas equation is,
where,
= initial pressure of gas = 1.20 atm
= final pressure of gas = ?
= initial volume of gas = 580 ml
= final volume of gas = 1.45 L = 1450 ml (1L=1000ml)
= initial temperature of gas =
= final temperature of gas =
Now put all the given values in the above equation, we get:
The new pressure is 0.509 atm
1 mole Cs ------------ 6.02x10²³ atoms Cs
1.2 moles Cs ------------- ?
1.2 * 6.02x10²³
= 7.224x10²³ atoms
hope this helps!