Betty learned about embryology in her science class. at home, her brother nathan noticed the human embryo and the fish embryo in her science notebook. he remarked that the embryos looked the same . how can this be true
( multiple choice )

Amonoprotic acid is an acid that donates a single proton to the solution. suppose you have 0.140 g of a monoprotic acid dissolved in 35.0 ml of water. this solution is then neutralized with 14.5 ml of 0.110 m naoh. what is the molar mass of the acid?

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

What’s the scientific notation for the number 6,840,000,000