The first shell can hold a maximum of two electrons. How does this explain the valence of hydrogen?

Which of the following happens when solid sodium chloride dissolves in water? A. The attractive forces between water and the sodium and chloride ions are overcome by the attractive forces between the sodium and chloride ions. B.

A 7.5 gram sample of zinc (specific heat = 0.390 J/g°C) is heated and then placed in a calorimeter containing 65.0 grams of water. The temperature of water increases from 20.00°C to 25.00°C. What was the initial temperature of the zinc?

The table below describes the temperature of different colors of stars. Color Temperature red under 3,500 K orange-red 3,500 - 5,000 K white-yellow 5,000 - 6,000 K blue-white 6,000 - 7,500 K blue 7,500 - 25,000 + K If the Sun is white-yellow, which

Give the actual ground-state electron configuration for copper (Cu) using the complete form. Express the electron configuration using superscripts where appropriate. For example, the configuration for Li would be entered as 1s^22s^1.

15. A 22.4-L sample of which of the following substances, at STP, would contain 6.02 x 10^23 representative particles? * a. gold b. sodium chloride c. sulfur d. carbon dioxide 16.

Benzene contains only carbon and hydrogen and has a molar mass of 78.1 g/mol. Analysis shows the compound to be 7.44% hydrogen by mass. Find the empirical and molecular Formula of benzene.

What is the Lewis structures for Ca (OH) 2

Compare and contrast homogeneous and heterogeneous mixtures using key terminology, and provide at least three examples of each. For example, explain what the mixture is comprised of and what makes it homogeneous or heterogeneous.

Which element would most likely have chemical properties similar to that of fluorine (F) ?

Percentage compostion of carbon in CaCO3