Answer:
Mass of Ca(OH)₂ required = 0.09 g
Explanation:
Given data:
Volume of HNO₃ = 25 mL (25/1000 = 0.025 L)
Molarity of HNO₃ = 0.100 M
Mass of Ca(OH)₂ required = ?
Solution:
Chemical equation;
Ca(OH)₂ + 2HNO₃ → Ca(NO)₃ + 2H₂O
Number of moles of HNO₃:
Molarity = number of moles / volume in L
0.100 M = number of moles / 0.025 L
Number of moles = 0.100 M ×0.025 L
Number of moles = 0.0025 mol
Now we will compare the moles of Ca(OH)₂ with HNO₃ from balance chemical equation.
HNO₃ : Ca(OH)₂
2 : 1
0.0025 : 1/2×0.0025 = 0.00125
Mass of Ca(OH)₂:
Mass = number of moles × molar mass
Mass = 0.00125 mol × 74.1 g/mol
Mass = 0.09 g
Lymph nodes.
The lymphatic system plays as the body’s first line of defense against disease
Answer:
Physicians and it is ethical because they promise to help
Explanation:
Answer:
T=34.20 °C
Explanation:
The formula given by the problem is
ρ= 1.5794 - 1.836*10⁻³ *(T-15)
ρ is density (in g/mL), and T is temperature (in °C).
To solve the problem we use a ρ of 1.543 g/mL and solve the equation for T:
1.543 = 1.5794 - 1.836*10⁻³ *(T-15)
0.0364 = 1.836*10⁻³ *(T-15)
19.1983=T-15
T=34.20 °C
