Which substance can not be broken down by a chemical change?

(1) ammonia (3) propanal

(2) ethanol (4) zirconium

Write the name of the product formed in the following synthesis reaction. potassium + fluorine

A certain compound is made up of two bromine atoms, one nitrogen atom, and one chlorine atom. what is the chemical formula of this compound? express your answer as a chemical formula.

Identify the elements necessary for hydrogen bonding

If a 1.85 g mass of zinc produces 475 mL of gas and your balloon weighs 0.576 g and the room temperature is 18.5°C.

Which of the following is not an intensive physical property?

If the half-life of hydrogen-3 is 11.8 years, after two half-lives the radioactivity of a sample will be reduced to one-half of the original amount. If the half-life of hydrogen-3 is 11.

If element X has 25 protons, how many electrons does it have?

How much work is done to raise a 20N box 4m?

Which of the following lists the types of single substances? (Select only one answer) Group of answer choices elements and mixtures suspensions, solutions, and colloids elements, compounds, and mixtures elements and compounds

What is the average mass of a single silicon atom in grams?