Answer:
x = 31
Explanation:
-24 = -1x + 7
subract 7 from both sides.
-31 = -1x
divide both sides by -1
31 = x
The required mass of argon in given number of atoms of argon is 155.61 grams.
<h3>What is Avogadro's number?</h3>
Avogadro's number is the number of atoms which are present in 1 mole of any substance and it is equal to 6.022×10²³.
Relation between the mass and moles of any substance will be represented as:
- n = W/M, where
- W = given mass
- M = molar mass
So, moles of argon will be calculated by using given number of atoms as:
Moles = 2.4×10²⁴ atoms / 6.022×10²³ atoms per mole
Moles = 3.9 moles
Now mass will be:
W = (3.9mol)(39.9g/mol) = 155.61 g
Hence required mass of argon is 155.6g.
To know more about Avogadro's number, visit the below link:
brainly.com/question/1513182
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The mass of the Pbl2 : 1308.87
<h3>Further explanation</h3>
Given
18.2 mL of a 0.156 M Pb(NO3)2
26.2 mL of a 0.274 M KI
Reaction
Pb(NO3)2 (aq) + 2 KI (aq) - Pbl2 (s) + 2 KNO3
Required
the mass of the Pbl2
Solution
mol Pb(NO3)2 = 18.2 x 0.156 = 2.8392 mlmol
mol KI = 26.2 x 0.274 =7.1788 mol
Limiting reactant Pb(NO3)2(smaller ratio of mol : reaction coeffiecient)
mol Pbl2 based on limiting reactant (Pb(NO3)2)
From equation, mol ratio of Pb(NO3)2 : Pbl2 = 1 : 1, so mol Pbl2=mol Pb(NO3)2=2.8392
Mass Pb(NO3)2 :
Answer:
"perpendicular" or at a "right angle"
Explanation:
an example of a transverse wave is the wave created by a string being moved up and down
the wave travels to the right (or left) through the string, while a particle of the string is moved up and down (in other words: if you put a mark on one part of the string, the mark would only move up and down)
since moving right is perpendicular to moving up/down, the disturbance is perpendicular to the wave motion