The correct answer is Helium Nucleus. Hope this helps.
The correct answer is C. I hope this helped!! :D
Volume = a x a x a
V = 2 cm x 3 cm x 4 cm => 24 cm³
Density = 19.3 g/cm³
Mass = ?
Therefore:
m = D x V
m = 19.3 x 24
m = 463.2 g
Answer:e. a solution with a pH of 9 is acidic
Explanation:
The pH scale shows the degree of acidity or alkalinity of a substance. The scale is graduated from 0-14. pH of 0-6.9 shows acidity, 7 is the midpoint of the scale and indicates neutrality. 8-14 shows alkalinity. An increase or decrease of pH by one digit indicates a ten fold increase or decrease in hydrogen ion concentration. From the foregoing, a pH of 9 can never indicate acidity.
Explanation:
If two gases are present in a container, the total pressure int in the container is equal to the sum of the partial pressure of each individual gas. This is given by Dalton and it is known as Dalton's Law of Partial Pressure. The combined pressure of the two gases