Which one of the following is a balanced equation? A. 2Ca (s) + O2 (g) → 2CaO (s) B. 6Ca (s) + 2O2 (g) → 6CaO (s) C. 4Ca (s) + O2 (g) → 2CaO (s) D. 6Ca (s) + 4O2 (g) → 2CaO (s)

One mole of water contains 16 grams of oxygen atoms.

You have a balloon filled with hydrogen gas which keeps it at a constant pressure, regardless of its volume. The initial volume of the gas is 736 mL at 15.0 C. The gas is heated until it's volume is 2.

Why orang utans are said to be an endemic species

Scientists studied the evolution of horses. They concluded that horses evolved with the emergence of grasslands and an increase of predators. The digits of their early Eocene ancestor evolved into hooves. The diet changed from foliage to grasses.

How can rice and flour mixture could be separated?

What do all elements in the same period of the periodic table have in common

The function of the root cortex is to: a. Provide stiffness to the plant b. Make plant food c. Store food and water d. Transport water and minerals

The quantitative differences in biological activity between the two enantiomers of a compound are sometimes quite large.

Which of these properties, used alone, would be LEAST useful in identifying MOST minerals? A. color B. luster C. streak D. density

Which phases describe air density?