Answer:
The belt is estimated to contain between 1.1 and 1.9 million asteroids larger than 1 kilometer
The average atomic mass of lithium is 6.941 amu.
Answer:
m/s
Explanation:
One 'm' and one 's' in the numerator and the denominator 'cancel out' and you are left with m / s
A heat is lost to the surroundings
Answer:
The pH of the solution is 4.28
Explanation:
The dissolution reaction as below
CH₃COOH ⇔ CH₃COO⁻ + H⁺
Assume the concentration of the ion, [H⁺] = a,
so [CH₃COO⁻] = a and [CH₃COOH] = 3a
Then use the formula of Ka, we get
Ka = a * a / 3a = 10^-4.76 ⇔ a = 3 x 10^-4.76 = 5.21 x 10^-5
Hence pH = -log(a) = - log(5.21 x 10^-5) = 4.28