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A sample of pure silver has a mass of 139 g. How many moles of silver are in the sample?

Which pair of elements has the most similar properties?

Write a formula for the compound that forms between Mg and Cl.

Identify which is the main idea and which is the supporting detail in the pairs of sentences. Write “MI” in the blank if it is the main idea and “SD” if it is a supporting detail. a. [sentence1] There are many factors that can affect the quality of education that a school provides. b. [sentence2] It is clear that class size can make a significant difference in how much students learn.

True or False: The reading suggests that governments without much money for education should concentrate on math and science first.

Name the compound PCl5.

Choose the best word to complete the sentence: It is important for education nowadays to _____________ the skills necessary in the global economy.

Name the compound Na3N.

True or False: El Sistema has helped almost 2 million children in Venezuela.

Choose the best word to complete the sentence: Students in the age ______________ of 14 to 18 years are more likely to experience testing anxiety than other ages.