Which equation is balanced? 2Al+3F2→2AlF3 Al+3O2→Al2O3 Na+F2→2NaF Mg+2O2→2MgO

If you increase the temperature of a gas, the pressure ...

What affects a material's resistance

An iron ore sample contains plus other impurities. A 729-g sample of impure iron ore is heated with excess carbon, producing 277 g of pure iron by the following reaction: What is the mass percent of in the impure iron ore sample?

Gravity is a force of attraction between two or more masses. The gravitational attraction between the Sun and each of the planets is responsible for which of the following?

What land feature creates new land? Glacier Basin Volcano Desert

A group of students are making a sign that is 3 meters long. If each student works on 20 cm of the sign how many students can work on the sign?

How many molecules are in 4.50 moles of H2O? A. 450 molecules B. 6.02 x 1023 molecules C. 2.71 x 1024 molecules D. 3.00 molecules

What is the main difference between a longitudinal wave and a transverse wave?

How many moles of methane (CH4) are in 7.31*10/25 molecules

What starting matirials do cells need for cellular respiration