Which one of the following is a vestigial structure? 1. Heart 2. Appendix 3. Right leg 4. liver

If the take off velocity of an airplane on a runway is 300 km / hr with an acceleration of 1 m/s2. What is the take off time of the airplane?

At what pressure would 14.4 grams of oxygen gas occupy 7.5 liters at a temperature of 375 K?

Hydrofluoric acid, hf, has a ka of 6.8 * 10-4. what are [h3o+], [f-], and [oh-] in 0.710 m hf?

Consider the balanced equation below. N2H4 + 2H2O2 → N2 + 4H2O What are the mole ratios of hydrazine (N2H4) to hydrogen peroxide (H2O2) and hydrazine to water? 1:2 and 1:4 1:3 and 1:4 1:2 and 3:5 1:3 and 3:5

How many valence electrons do the halogens possess?

Which of the following is an element? a. carbon monoxide gas (co) b. magnesium chloride salt (mgcl) c. hydrochloric acid (hcl) d. zinc metal (zn)

Describe the formation of an aqueous KI solution when KI dissolves in water

Which the following countries founded their first permanent settlement in North America: England, the Netherlands, France, and Spain

Why does salt separated from a saltwater solution look different than the salt that dissolved in the water

Which of the compounds below is not an example of a molecular solid?