Answer:
a is write
Explanation:
Why are all ionic compounds crystalline in structure?
Ionic compounds are generally hard, but brittle. ... The repulsive forces between like-charged ions cause the crystal to shatter. When an ionic crystal breaks, it tends to do so along smooth planes because of the regular arrangement of the ions.
Answer:
I would go for number 5 . It sounds more logical to me.
The average atomic mass of hydrogen (99% H-1, 0.8% H-2, and 0.2% H-3) is 1.012 amu.
The average atomic mass of hydrogen can be calculated with the following equation:
Where:
: is the mass of protium (H-1) = 1
: is the <em>mass</em> of deuterium (H-2) = 2
: is the <em>mass </em>of tritium (H-3) = 3
: is the abundance percent of H-1 = 99%
: is the <em>abundance percent</em> of H-2 = 0.8%
: is the <em>abundance percent</em> of H-3 = 0.2%
The average atomic mass is:
Changing all the <u>percent values</u> into <u>decimal ones</u>, we have:
Therefore, the average atomic mass of hydrogen is 1.012 amu.
Learn more about average atomic mass here brainly.com/question/8575403?referrer=searchResults
I hope it helps you!
Answer: 0.50 mole K2O
Explanation: To convert the mass of K2O to moles we will need to find the molar mass of K2O.
47.2 g K2O x 1 mole K2O / 94 g K2O
= 0.50 mole K2O
We feel comfortable under a fan when we are perspiring because the fan actually increases the rate of evaporation of sweat. This means that the perspiration (or sweat) evaporates more quickly when we are under a fan, which also means that our body feels cooled and comfortable because of the lack of sweat.