0.00167265 mm
Explanation:
Given the spacing between the molecules in the crystal is 15.93 nm.
1 nm = 
m
so 15.93 nm = 15.93 * = 1.593 * 
m
Spacing between 2 molecules is 1.593 * m
So total width of 105 molecules crystal is 1.593 * *105 = 167.265 * m
We know that
1 m = 1000 = 
mm
So total width of 105 molecules crystal in millimeters is 167.265 * *
= 167.265 * 
= 1.67265 * 
mm = 0.00167265 mm
Answer:
two valence electrons
Explanation:
Magnesium is alkaline earth metal and belongs to group IIA of the periodic table. It has two valence electrons which are present in 3s subshell.
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Answer:
D. > 7
Explanation:
Benzoic acid, HX, is a weak acid that reacts with OH- as follows:
HX + OH- → X- + H2O
<em>Where X- is produced, the conjugate base of benzoic acid.</em>
As benzoic acid is a weak acid, benzoate ion is a strong base. A strong base has pH > 7. Right option is:
D. > 7
I think the answer is D. the upper surface of undergound water.
The outer shell of the atoms in group D of the periodic table consists of elements whose outermost shell is full
Their outermost shell consist of elements with valence electrons
The group D elements are found in between S and P blocks of the periodic table
<h3>What is an element?</h3>
An element is a substance which cannot be split into simpler units by ordinary process.
Few examples of elements which belongs to group D include the following:
- Scandium
- Titanium
- Vanadium
- Chromium
- Manganese
- Iron
- Nickel
- Copper
- Zinc
Learn more about elements:
brainly.com/question/14514242
