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.
In order to achieve the Octet rule and stability, the atom will lose or gain electron so that only eight electrons will be in the shell. These elements are placed in the group 1 or A of the periodic table. The group is comprised of the hydrogen and the alkali metals.
Answer:
Al2O3
Explanation:
If we combine two Al3+ ions and three O2- ions, and use subscripts to indicate the number of each ion in the formula, we obtain Al2O3 as the empirical formula
Answer:
Your question is missing some information.
But in most of the systems, potential energy and kinetic energy are inversely proportional
Answer:I think D
Explanation: it makes sence