Im earth is about 4.5 billion years old which statement is true

Two samples of calcium fluoride are decomposed into their constituent elements. the first sample produced 0.154 g of calcium and 0.146 g of fluorine. if the second sample produced 294 mg of fluorine, how many g of calcium were formed? 0.309 g 3.

How does the law of energy affect the total amount of energy in any process?

When an excited electron in an atom moves to the ground state, the electron (1) absorbs energy as it moves to a higher energy state (2) absorbs energy as it moves to a lower energy state (3) emits energy as it moves to a higher energy : state (4)

How do I determine the flow rate of a liquid?

What element has only one proton in its nucleus?

How many liters of nh3 are needed to react completely with 30.0 l of no (at stp) ? 4nh3 (g) + 6no (g) → 5n2 (g) + 6h2o (g) ?

What is the valence number of lithium?

How do buffers affect the pH of a solution? I would greatly appreciate an answer to this question.

A gas occupies 900.0 ML at temperatures of 27.0 Celsius. What is the volume at 123.0 celsius

A stock solution containing Mn2 ions was prepared by dissolving 1.584g of pure manganese metal in nitric acid and diluting to a final volume of 1.000L. The following solutions were then prepared by dilution:a. For solution A, 50.