Check ALL that apply in which chemistry (the elements) has helped modern day life. -Rust proof paint
-Sporting equipment
-Pesticide control
-Fuel
-Soil nutrition for farming
-Dietary supplements
-Medicines
-Household cleaners
-Personal hygiene (soaps, shampoo, etc.)

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

What are some natural measures of time