HF + NaOH - > H2O + NaF. How many grams of sodium fluoride can be expected if 100mL of Hydrofluoric acid is used?

Two compounds are mixed. Which statement is true if there is only a physical reaction?

What element is the most abundant in the earths crust?

Liquid water is heated until it boils and becomes water gas. Which statement is true about the water? a.) Both the physical properties and the chemical properties have changed. b.

How many atoms are present in 34.228 g of sodium

The atomic number of an element best corresponds to which of the following? O The mass of an atom of that element. O The number of electrons orbiting the nucleus of an atom of that element.

An unknown solution turned red litmus paper red, turned blue litmus paper blue, and didn't conduct electricity. The solution is most likely ... a Basic b Acidic c Neutral d Not enough information to determine

Which of the following does NOT occur at a subduction zone? A. The leading edges of both plates are bent downward. B. Oceanic crust is pushed down into the mantle. C. One oceanic plate moves into another oceanic plate. D.

4. What structural characteristics do all hydrogen atoms have in common?

Which of the following would be a result of increased solar activity? A. Longer winters B. Warmer-than-normal sea surface temperatures C. Colder-than-normal sea surface temperatures D. Shorter summers

The electron configuration of an element is 1s22s22p63s23p64s1. why is this a representative element?