Will mark brainliest to first response

which equation is balanced?

2al+3o2→al2o3
2mg+o2→2mgo
al+3f2→alf3
na+f2→2naf

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth