In all nuclei above atomic number 83, the strong nuclear force is not strong enough to balance the electrostatic repulsion between protons.
Nuclei like deuterium, carbon-13, and neon-21 are all stable.
But elements like uranium-238 are radioactive. U-238 (Z = 92) has a half-life of about 4.5 billion years.
There's two sig figs: the 1 and the zero. The 10^-2 contributes no sig figs.
CO because it is the chemical symbol for the element cobalt whereas the rest are compound. H20 is water, CO2 is carbon dioxide and N2 is dinitrogen.
Answer:
Molarity = 1.4 M
Explanation:
Given data:
Density of acetic acid = 1.049 g/mL
Volume of acetic acid = 20.0 mL
Volume of solution = 250.0 mL (250/1000 = 0.25 L)
Molarity = ?
Solution:
Mass of acetic acid = density × volume
Mass of acetic acid = 1.049 g/mL × 20.0 mL
Mass of acetic acid = 20.98 g
Number of moles of acetic acid = mass/ molar mass
Number of moles of acetic acid = 20.98 g/ 60.052 g/mol
Number of moles of acetic acid = 0.35 mol
Molarity = number of moles / volume in L
Molarity = 0.35 mol / 0.25 L
Molarity = 1.4 M
Answer:
High pressure and low temperature, because particles are forced closer together and moving slower, so the volume of the particles is less significant