hola necesito un ensayo de la importancia de la química en los avances tecnológicos ayúdenme por favor

1) Why are the antimony and beryllium ions so small? Differentiate between the causes. 2) Why do both ions and atoms tend to grow larger as we go down the periodic table? 3) Why are the antimony and beryllium ions so small?

Choose an appropriate question to ask when you add salt to water to make pasta.

Complete the nuclear equation 238 92U - →? + 234 90Th.

A children's liquid medicine contains 100mg of active ingredient in 5 mL. If a child should receive 200 mg of the active ingredient how many mL of the medicine she's a child be given for the purpose of this question assume that these numbers are in

The standard heat of formation of a branched alkane is - 35 kcal/mol; the standard heat of formation of the unbranched version of alkane (same molecular formula) is - 28 kcal/mol.

Burning wood represents a chemical change. True or False?

Why are phosphates in laundry detergent

What is the name of the scientist who discovered the electron

Which of these is not a covalent molecule? 1. F2 2. CO 3. LiF 4. NH3

Define buffer capacity. a. buffer capacity is the amount of acid or base that can be added to a buffer without destroying its effectiveness. b. buffer capacity is the amount of acid that can be added until all of the base is used up. c.