Moles = Molarity x Volume
Moles = 2.0 x 0.50
= 1.0 mole
hope this helps!
Answer:
100 mL
Explanation:
The reaction that takes place is:
- CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂
First we <u>convert 500 mg of CaCO₃ into mmoles</u>, using its <em>molar mass</em>:
- 500 mg ÷ 100 mg/mmol = 5 mmol CaCO₃
Then we <u>convert 5 mmoles of CaCO₃ into HCl mmoles</u>, using the <em>stoichiometric coefficients of the balanced reaction</em>:
- 5 mmol CaCO₃ *
= 10 mmol HCl
Finally we <u>calculate the volume of a 0.10 M HCl solution (such as stomach acid) that would contain 10 mmoles</u>:
- 10 mmol / 0.10 M = 100 mL
Answer:
B.
when the food is chewed
Explanation:
first step is from your mouth when you chew the food
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
.