Answer:
ummmmmmmmmmmmmmmm..mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
Explanation:
ummmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm.................... candyunicorns1999 has left the chat
The empirical formula of Lorelai's compound is C₄H₁₀O
<h3>Data obtained from the question</h3>
- C = 64.8 g
- H = 13.62 g
- O = 21.58 g
- Empirical formula =?
<h3>How to determine the empirical formula</h3>
Divide by their molar mass
C = 64.8 / 12 = 5.4
H = 13.62 / 1 = 13.62
O = 21.58 / 16 = 1.35
Divide by the smallest
C = 5.4 / 1.35 = 4
H = 13.62 / 1.35 = 10
O = 1.35 / 1.35 = 1
Thus, the empirical formula of the compound is C₄H₁₀O
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The best way (in my opinion) is to put it in a table or spreadsheet.
Answer:
84.11 g/mol
Explanation:
A metal from group 2A will form the cation M²⁺, and the ion carbonate is CO₃²⁻, so the metal carbonate must be: MCO₃, and the reaction:
MCO₃(s) → MO(s) + CO₂(g)
For the stoichiometry of the reaction, 1 mol of MCO₃(s) will produce 1 mol of CO₂. Using the ideal gas law, it's possible to calculate the number of moles of CO₂:
PV = nRT , where P is the pressure, V is the volume(0.285 L), R is the gas constant (62.36 mmHg*L/mol*K), n is the number of moles, and T is the temperature (25 + 273 = 298 K).
69.8*0.285 = n*62.36*298
18583.28n = 19.893
n = 0.00107 mol
So, the number of moles of the metal carbonate is 0.00107. The molar mass is the mass divided by the number of moles:
0.0900/0.00107 = 84.11 g/mol
Answer : The image is attached below.
Explanation :
For
:
Molar mass, M = 48 g/mol
Mass, m = 24 g
Moles, n = 
Number of particles, N = 
For
:
Molar mass, M = 17 g/mol
Mass, m = 170 g
Moles, n = 
Number of particles, N = 
For
:
Molar mass, M = 38 g/mol
Mass, m = 38 g
Moles, n = 
Number of particles, N = 
For
:
Molar mass, M = 44 g/mol
Moles, n = 0.10 mol
Mass, m = 
Number of particles, N = 
For
:
Molar mass, M = 46 g/mol
Moles, n = 0.20 mol
Mass, m = 
Number of particles, N = 
For
:
Molar mass, M = 20 g/mol
Number of particles = 
Moles, n = 
Mass, m = 
For
:
Molar mass, M = 44 g/mol
Number of particles = 
Moles, n = 
Mass, m = 
For unknown substance:
Number of particles = 
Mass, m = 8.5 g
Moles, n = 
Molar mass, M = 
The substance is
.