Answer:
The answer to your question is:
Explanation:
1 mol = 6.022 x 10 ²³ atoms
755 moles = x
x = 755 x 6.022 x 10 ²³ / 1 = 4.54 x 10 ²⁶ atoms
Answer:
True
Explanation:
According to some calculations, the Earth is losing 50,000 metric tons of mass every single year, even though an extra 40,000 metric tons of space dust converge onto the Earth's gravity well, it's still losing weight.
Answer: 
will make an electrolytic solution
Explanation:
Electrolyte is a substance which dissociates into ions when dissolved in water and thus is able to conduct electric current through them.
Compounds in solid form does not conduct electricity due to the absence of free ions.
a) 
is a covalent compound and thus not an electrolyte.
b) 
is a covalent compound and thus do not dissolve in water and thus is not an electrolyte.
c) is an ionic compound and thus dissolve in water and give ions which help to conduct electricity.
d) 
is a covalent compound and thus do not dissolve in water and thus is not an electrolyte.
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Answer :
electron dot diagram
Explanation
the valence electrons of an atom are the electrons located in the highest occupied principal energy level. Valence electrons are primarily responsible for the chemical properties of elements. The number of valence electrons can be easily determined from the electron configuration. Several examples from the second period elements are shown in the Table below.
lithium 1s22s1 1 valence electron
beryllium 1s22s2 2 valence electrons
nitrogen 1s22s22p3 5 valence electrons
