What percent of the first 36 elements on the periodic table are solids at room temperature?

How would oxygen be represented in the formula equation for the reaction of methane and oxygen to yield carbon dioxide and water

A teacher does a demonstration for her science class. She has two beakers that are each filled with 100 mL of colorless liquid. She also has two identical pieces of magnesium metal.

What gives the gem amethyst its purplish color?

These two beakers represent solutions of HCl and NaOH

How many moles of Oxygen are in 0.52 mol of Ca (NO3) 2?

How many moles of oxygen react with 0.23 moles of NH3

How many moles of carbon do you have in 100 quadrillion carbon atoms? report answer to 2 sig figs

A small 15 kilogram canoe is floating downriver at a speed of 4 m/s. What is the canoe's kinetic energy?

Liquid water is heated until it boils and becomes water gas. Which statement is true about the water?

You are conducting an experiment on plant growth. You take a plant fresh from the soil that weighs 5 kilograms (kg). Then you dry the plant overnight and determine the dry weight to be 1 kg.