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

Convert 0.965 moles of H2O to grams SHOW WORK

In North America, where is population density the highest? A. Near the coasts and Great Lakes B. Along the east coast C. In the midwestern region D. California

In the redox conversion of Ni2 + to NiO4-, the oxidation number of Ni goes from (-2, 0, + 2) to (-1, + 1, + 7, + 9). Recall that the oxidation number of oxygen is typically - 2. 1. 0; + 9 2. + 2; + 7 3. + 2; - 1 4. - 2; + 9 5. - 2; + 7 6. 0; + 1 7.

6.7 mL of a ptassium chlorid solution was added to a 54.730 gevaporating dish. The combination weight 61.945 g. Afterevaporation the dish contents weight 55.428 g. a. What was the mass percent of potassium chloride in thesolution? b.

Explain the difference (energetically) between the of melting and freezing of a substance?

What are 3 physical properties of aluminum foil

A chemist heats a sample of hydrated lithium nitrate which weighs 170 grams and finds, after heating that it weighs 95.3 grams. What is the percent of water in the hydrate?

What is toxicity? Give an example of something from your home.

Why was it important to polish the copper strips and wire, the coin, and the nail in the electroplating experiment? You need to remove a layer of copper from the surface of each material.

Which response includes all the following that are properties of most metals, and no other properties? Z1) They tend to form cations. Z2) They have high first ionization energies. Z3) They have outer electronic shells that are more than half-filled.