What is the percent composition by mass of nitrogen in NH4NO3 (gram-formula mass = 80.0 grams/mole) ?

(1) 17.5% (3) 52.5%

(2) 35.0% (4) 60.0%

If a carbon atom has - 4 electrons

A sample of gas has increased in temperature from 20° Celsius to 22° Celsius. Which of the following happens as the temperature of the gas goes up? The gas undergoes a phase change. The velocity of the gas particles decreases.

An explosion is a rapid chemical reaction that results in a considerable increase in volume of gases. a. True b. False

Explain Mendeleev's law about the Mendeleev table.

47.060 centimeters to meters 470.6

What conclusion can be drawn from the statement that an element has low electron affinity, low electronegativity, and a low ionization energy?

A scientist performs an experiment in which a radium-226 (Ra-226) atom decays into radon-222 (Rn-222). The scientist concludes that some energy must have been added to the system to cause this reaction to begin.

Which suitable method can be used to separate a mixture of sand and paraffin

How many vowels does the word love have

What is silicon used for? -matches -gunpowder -glass -steel can coating