A chemist needs 200 millileters of a 69% solution but only has 58% and 78% solutions available. How many milileters of each should be mixed to obtain the desired solution

Matches the chemical name of each oxide of phosphorus to its chemical formula

Why does his teacher ask him to balance the equation by including the correct coefficient

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange