Explanation:
Divide 67.6% by 201 of mercury
Divide 10.8% by 32 of sulfur
Divide 21.6% by 16 of oxygen
Then divide number by itself .
Example : Divide 2.97 by both sulfer moles and oxygen moles . Multiply by 2 to get whole number
Answer:
A. They can not be divided.
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BY GERALD GREAT.
No, cutting paper is a physical change, as you are changing how the paper appears.
hope this helps
Answer;
(4) Sodium can combine with chlorine to produce
a salt.
Explanation;
Sodium is an alkali metal (group 1 ) in the periodic table. It is a soft metal, reactive and with a low melting point. It has an atomic weight of 23 grams.
Sodium is a good conductor of electricity due to the presence of delocalized electrons in its metallic structure. It reacts vigorously with water to produce sodium hydroxide and hydrogen.
-When exposed to air, metallic sodium recently cut looses its silvery appearance and acquires an opaque grey color due to the formation of a sodium oxide coating.
Answer:
- <u><em>Substance A.</em></u>
Explanation:
pH is a measure of the concentration of H₃O⁺ ions in a solution.
It is defined as:
![pH=\log \dfrac{1}{[H_3O^+]}=-\log [H_3O^+]](https://tex.z-dn.net/?f=pH%3D%5Clog%20%5Cdfrac%7B1%7D%7B%5BH_3O%5E%2B%5D%7D%3D-%5Clog%20%5BH_3O%5E%2B%5D)
For the given substances
Sustance [H₃O⁺] pH = - log [H₃O⁺]
M
A 4×10⁻⁶ -log (4×10⁻⁶) = 5.4 ← answer
B 6×10⁻⁷ -log (6×10⁻⁷) = 6.2
C error - - - - - -
D 1.3×10⁻¹ -log (1.3×10⁻¹) = 0.89
Thus, the unknown substace most likely is A.
