Answer:
Isotopes
Explanation:
This is the definition of isotopes: they are atoms of the same element that contain different numbers of neutrons.
Answer:
R = 40 ohms
Explanation:
Given that,
The voltage of outlet, V = 120 V
Current flowing through the device, I = 3 A
We need to find the Resistance rating of the power cord. Let the resistance is R. We know that,
Ohm's law, V = IR
Put all the values,

So, the resistance rating of the power cord is equal to 40 ohms.
Answer:
Explanation:
The reason for that is because atoms make elements needed for survival(oxygen, hydrogen, nitrogen, carbon, etc.).
The answers for the following questions is answered below.
- Therefore the volume of a gas is 22.4 L
- <u>Therefore the number of moles of oxygen are 2.37 moles</u>
Explanation:
1. Given:
no of molecules (n) = 6.023 × 
volume of gas at STP conditions (V) =22.4 liters
To solve:
Volume of gas (v)
We know;


1 × 22.4 = v
v =22.4 L
Therefore the volume of a gas is 22.4 L
2. Given:
volume of oxygen gas (v) = 53 L
Volume of gas at STP conditions (V) =22.4 L
To solve:
no of moles of oxygen gas
We know;

n =
n =2.37 moles
<u>Therefore the number of moles of oxygen are 2.37 moles</u>
<u></u>
Answer:
What do cuticles do for land plants that was not necessary for ancestors that lived in water? Cuticles help prevent water loss. ... The next groups of land plants to evolve were ferns, which could grow bigger and taller because they could transport water and food.
Explanation: