Answer:
Silver and gold do not react with dilute acids. The metals like Cu,Au,Ag are less reactive than hydrogen. They do not displace hydrogen from dilute acids. Those metals which are above in the reactivity series displace hydrogen from dilute acids.
Explanation:
Percentage O: 69.54
Percentage N: 30.46
Dividing each percentage by the components molecular weight:
Oxygen: 69.54 / 16 = 4.35
Nitrogen: 30.46 / 14 = 2.18
Ratio of nitrogen to oxygen = 1 : 2
Empircal formula: NO₂
Mass of empirical formula = 46
Repeat units = 92 / 46 = 2
Molecular formula = N₂O₄
Answer:
The fingernails and toe nails protect the nerve endings at the ends of the finger and toes