Answer:
the atmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form. (60 degrees fahrenheit
Explanation:
Explanation:
in this question, we're asked how to determine whether we have a metallic or nonmetallic substance.So what you want to do is one to remember that metals are malleable and Nonmetal are brittle. So if we were to hammer the metal, it would be very malleable, but the nonmetal would fall apart. And never we could just hammer the sample and see whether it was malleable. And therefore it would be a medal or a brittle and therefore being nonmetal.
Whichever one has a negative enthalpy value.
Answer:
Mass = 4.5 g
Explanation:
Given data:
Number of atoms of iron = 4.85 ×10²² atoms
Mass of iron = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
4.85 × 10²² atoms of iron / 6.022 × 10²³ atoms × 1 mol
0.081 mol
Mass of iron:
Mass = number of moles × molar mass
Mass = 0.081 mol × 55.85 g/mol
Mass = 4.5 g
