Answer:
D. The development of a solar heating system.
Explanation:
Warming a cup by adding hot tea is science, so is study of heat transfer so the answer has to be D
Answer:
yeah it definitely could mean that but it might also mean he just wants to be friends, so you'all have to wait a little while just to pick up on more things
Liquid has a definite volume but no specific shape<span />
Just because they have same atomic masses doesn’t make them similar. They have different chemical properties because they are made of different things. And physical properties because they form different bonds with different atoms in the process.
Answer:
Percent yield = 90.9%
Explanation:
Given data:
Mass of CaCO₃ = 50.0 g
Mass of CO₂ produced = 20.0 g
Percent yield = ?
Solution:
Chemical equation:
CaCO₃ → CaO + CO₂
Number of moles of CaCO₃:
Number of moles = mass/molar mass
Number of moles = 50.0 g/ 100.1 g/mol
Number of moles = 0.5 mol
Now we will compare the moles of CO₂ with CaCO₃.
CaCO₃ : CO₂
1 : 1
0.5 : 0.5
Mass of CO₂: Theoretical yield
Mass = number of moles × molar mass
Mass = 0.5 mol × 44 g/mol
Mass = 22 g
Percent yield:
Percent yield = ( actual yield / theoretical yield ) × 100
Percent yield = (20.0 g/ 22.0 g) × 100
Percent yield = 0.909 × 100
Percent yield = 90.9%