Answer: Dmitri Mendeleev
Explanation: He invented it, since he wanted to arrange all the elements.
Answer:
Explanation:
Diameter in the coin is the distance from side to side.
The numbers in the ruler are showing the centimeters. Each line is a subdivision in ten parts between centimeter and centimeter (Each line is equal to 1mm).
As you can see in the ruler, in the edge of the coin, the ruler is showing 3.8cm
As 1cm = 10mm:
3.8cm * (10mm / 1cm) =
38mm is the diameter of the coin to the nearest milimeter
Answer:
A. The number of moles of HNO2 will remain the same. True
B. The number of moles of NO2- will remain the same. False
C. The equilibrium concentration of H3O will remain the same. False
D. The pH will decrease. False
E. The ratio of [HNO2] / [NO2-] will remain the same. True
Explanation:
The mixture of nitrous acid and potassium nitrite is a buffer solution. Hence the properties outlined above. Buffer solutions are designed to militate against changes in acidity or alkalinity. This explains why the above statements were categorized as true or false accordingly.
