The bridge is completely surrounded by cold air in the winter and by hot air in the summer. It is not insulated by the ground beneath it
1. mixture
2. pure
3.mixture
4.mixture
5.pure
6.pure
7. pure
8. mixture
9. mixture
10. pure
11. pure
12. mixture
Answer:
Mass = 19.78 g
Explanation:
Given data:
Mass of NO produced = ?
Mass of NO₂ reacted = 60.0 g
Solution:
Chemical equation:
3NO₂(g) + H₂O(l) → 2HNO₃(g) + NO(g)
Number of moles of NO₂:
Number of moles = mass/molar mass
Number of moles = 60.0 g/ 46 g/mol
Number of moles = 1.3 mol
Now we will compare the moles of NO₂ with NO.
NO₂ : NO
3 : 1
1.3 : 1/3×1.3 = 0.43 mol
Mass of NO:
Mass = number of moles × molar mass
Mass = 0.43 mol × 46 g/mol
Mass = 19.78 g
Answer:
The average mass of all isotopes of the element
Explanation:
Mass number is most similar to the average mass of all isotopes of the element. Mass number = number of protons +number of neutrons, and it is a mass of one of the type of isotope.
