A compounds empirical formula is CH2. If the formula mass is 28 g/mol, what is the molecular formula

Which group of elements shares characteristics with both metals and nonmetals? metalloids salts halogens alloys

SO2 (g) + NaOH (s) = Na2SO3 (s) + H2O

What is a funnel cloud that can damged things

If the amount of gas is decreased and the temperature and pressure stay constant, what will be the effect on its volume?

Acetylene C2H2 gas is often used in welding torches because of the very high heat produced when it reacts with oxygen O2 gas, producing carbon dioxide gas and water vapor. Calculate the moles of oxygen needed to produce 1.5mol of water.

What is the concentration of hydronium in each of the following cases: [OH-] = 10-12 M? [OH-] = 10-2 M?

Which statement best explains why elements are matter? An element is a physical substance that has mass and takes up space. Elements are pure substances that cannot be divided chemically. Each element is a pure substance composed of one type of atom.

Which of the following best describes what causes the phases of the moon? The alignment of the sun, Earth, and moon The speed of the moon around the Earth The speed of the Earth around the sun The alignment of the planets

At which temperature would atoms of a He (g) sample have the greatest average kinetic energy? (1) 25°C (3) 273 K (2) 37°C (4) 298 K

In the reaction, HCl + H2O produces H3O + Cl, what is the conjugate acid