Answer:
It's a list of metals from most to least reactive.
Explanation:
You should be able to find it listed really easily online.
Answer: C) The mass stays constant as it changed from a liquid to a gas
Explanation: Mass stays constant, it's never destroyed or created. It follows the law of conservation of mass.
Answer:
A. 3NaOH(aq)+Fe(NO3)3(aq) ---> Fe(OH)3 (solid)+ 3NaNO3(aq)
B. Double replacement reaction
AB +CD ---> AD + CB
Atoms are the smallest division of the element. The potassium atoms present in the 235 gm of the compound is atoms.
<h3>What is the number of atoms?</h3>
Given,
- Mass (m) of Potassium sulfide = 235 gm
- Molar mass (M) of Potassium sulfide = 110.26 g/mol
Calculate the number of moles as:
In the given compound , there are two atoms of potassium and one atom of sulphur.
If, 1 mole = atoms of potassium
Then, 2.13 moles = X atoms
Solving for X:
Therefore, option c. is correct.
Learn more about atoms here:
brainly.com/question/11411852
Answer:
67.4 mol of O atoms
Explanation:
Cassitrerite is a Tin Mineral having a chemical formula SnO₂. As seen in chemical formula there are two moles of Oxygen atoms for each Tin atom. So we can conclude that,
For,
1 mole of Sn in SnO₂ there are = 2 moles of O atoms
So for,
33.7 moles of Sn there will be = X moles of O atoms
Solving for X,
X = (33.7 mol of Sn × 2 mol of O) ÷ 1 mol of Sn
X = 67.4 mol of O atoms