20. What is the area of a piece of metal foil that measures 43.9 cm by 29.21 cm? Express the answer to

the correct number of significant figures.

a. 128 cm2

b. 1280 cm?

1280.3 cm?

d. 1280.32 cm

128.0319 cm?

C.

e.

Match the substance with its chemical formula. 1. H + water 2. H2O hydrogen ion 3. H3O hydronium ion 4. OH - hydroxide ion

Which lists only metalloids? A) arsenic (As), sulfur (S), and polonium (Po) B) antimony (Sb), tellurium (Te), and gallium (Ga) C) boron (B), germanium (Ge), and tellurium (Te) D) polonium (Po), aluminum (Al), and silicon (Si)

Is the H-H bond polar or nonpolar?

Which statement correctly describes the electrons in a water molecule? Electrons are pulled closer to the hydrogen atoms. Electrons are pulled closer to the oxygen atom. Electrons are located inside the nucleus of the hydrogen atoms.

Which compound is least soluble in water at 60 degrees Celsius

Expressing concentrations in terms of molarity is especially convenient since it allows one to count chemical particles by measuring

If the average American throws away 4.5 lb of trash each day, and the population of the US is estimated to be 311 million people, calculated the number of metric tons of garbage thrown away in the US each year.

Difference between radical and compound

Water is a produced when 30.0 grams of hydrogen reacts with 80.0 grams of oxygen what is the limiting reagent

How are reactions and products related in a chemical reaction?