Which of the answer choices best represents the approximate relative mass of the three subatomic particles?

(Select all that apply.)

protons = neutrons

electrons = neutrons

neutrons > electrons

protons > electrons

Heptane (C7H16) and octane (C8H18) are constitutents of gasoline. At 80 degree celsius, the vapor pressure of heptane is 428mmHg and the vapor pressure of octane is 175mmHg.

How many liters of oxygen gas, at standard temperature and pressure, will react with 25.0 grams of magnesium metal? 2Mg + O2 yields 2MgO

To make a 2 M solution of calcium chloride (CaCl2), you would place how many grams of CaCl2 into a container and then add how much pure water?

What is the name of the compound with the formula al (ch3coo) 3?

Whay is the first step in the dissolving process

Which set of terms best defines what affects kinetic energy and potential energy, respectively? position, gravity gravity, velocity velocity, height height, position

Which radiation detection device is the best to use for measuring the presence of radiation in large moving objects where constant monitoring is impossible? film badge Geiger counter cloud chamber scintillation counter

Smoke fiilling up a room is diffusion or not

What is the independent and dependent variable for a dry ice experiment

a substance that undergoes a physical change like melting is still the same substance is it true or false