What is the major element per mass in naoh?

a. oxygen

b. all elements contribute the same mass.

c. hydrogen

d. sodium?

A gas occupies 50.0 ml at standard temperature and pressure. if the volume of gas increases to 120ml, what is the new pressure

Which element is less electronegative than barium

All atoms of the element potassium have 19 protons. One of the most stable types of potassium atoms has the mass number 39.

What is the difference between physical and chemical properties

A marble, a bowling ball, a basketball, and a baseball are all sitting on the top shelf of a display case. Which one has the greatest potential energy?

Have scientists found any reliable predictors for earthquakes, like radon gas release or weird animal behavior?

The table compares the characteristics of a substance in three different states of matter. Comparison of Characteristics Characteristic State X State Y State Z Average Kinetic Energy of the Molecules Low Greatest Least Particle Attraction/Forces

In an exothermic reaction the bonding energy of the product is?

How many molecules are contained in two 540.-mg tablets of penicillin (C16H18N2O4S, molar mass 334.4 g/mol) ? Report your answer with the appropriate number of significant figures.

What was the result of john Brown's raid on Harpers ferry