Answer:
true because of burning plants such as crops
Explanation:
Answer:
28 g
Explanation:
The chemical equation of the reaction is given below:
CaCO₃ (s) ⇒ CaO (s) + O₂ (g)
From the chemical equation, 1 mole of CaCO₃ produces 1 mole of CaO.
So, we find the number of moles,n of CaCO₃ in 50 g from
n = m/M where n = number of moles of CaCO₃, m = mass of CaCO₃ and M = molar mass of CaCO₃ = 40 g/mol + 12 g/mol + 3 × 16 g/mol = 52 g/mol + 48 g/mol = 100 g/mol
So, n = m/M
= 50 g/100 g/mol
= 0.5 mol
Since From the chemical equation, 1 mole of CaCO₃ produces 1 mole of CaO, then 0.5 × 1 mole of CaCO₃ produces 0.5 × 1 mole of CaO, which is 0.5 mole of CaCO₃ produces 0.5 mole of CaO.
So, we have 0.5 mol of CaO.
We find the mass of CaO from
n =m'/M' where n = number of moles of CaO = 0.5, m' = mass of CaO and M' = molar mass of CaO = 40 g/mol + 16 g/mol = 56 g/mol
So, m' = nM'
= 0.5 mol × 56 g/mol
= 28 g
Answer: 1094 K
Explanation:
1560 mmHg/445 K= P2/312 k
Hello there!
The atomic number of an atom tells you an element's identity, and informs you of how many protons are present in the nucleus of the atom.
For example;
Potassium is an element with the symbol "K" on the periodic table that belongs in the Alkali Metal group, and has an atomic number of 19. This means that Potassium has 19 protons.
I hope this helps!
