Answer: 2800 g
Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number
of particles.
Given mass = 5 kg = 5000 g
1 mole of
produces = 1 mole of 
50 moles of
produces =
of 
Mass of 
2800 g of
is produced from 5.0 kg of limestone.
Answer:
B) Alcohol
Explanation:
It is methanol. Alcohol has group 'OH'
Answer: It depends on the element.
Explanation: Every element has a different amount of protons in its nucleus. It is the same as its atomic number on the periodic table. For example: Hydrogen has an atomic number of 1 because it has 1 proton in its nucleus, Helium has 2, Carbon has 6, Platnium has 78, and so on...
Answer:
<h2>4 A</h2>
Explanation:
The magnitude of the current can be found by using the formula

v is the voltage
r is the resistance
From the question we have

We have the final answer as
<h3>4 A</h3>
Hope this helps you