During a lab activity, students calculate the density of an element to be 7.78 g/cm3. The density listed on the periodic table is 7.13 g/cm3. Calculate the percent error and identify the element.

What is the species that determines the ph of a solution?

Fill in the numbers to interpret the isotope symbols. 92U238 has protons, neutrons, and electrons. 86Rn222 has protons, neutrons, and electrons.

Which of the following is least likely to dissolve in the polar solvent water? Answer ethanol salt sugar oil

Becky is a flower gardener. Her plants need a rich soil, full of nutrients, to grow. Propose a detailed plan of how Becky can determine if her soils are fit for growing flowers

A large planet that has a deep massive atmosphere is called a?

What kingdom is humans in!

Propane (C3H8) has a molar mass of 132 g/mole. You started out the day with a tank containing 9071 g of propane. At the end of the day, your tank contained 7532 g of propane gas. How many moles of gas did you use?

Why decomposition of ammonium nitrate is a redox reaction?

Two formulas for compounds containing hydrogen and oxygen are H2O and H2O2. Do these formulas represent the same compound? Explain.

My dog made become frightened and cover when he hears loud thunder this is an example of a reaction to What kind of stimuli A. chemicals B. light C. touch D. sound