a nail made of fe(s) is placed in a solution of a pd(ii) salt. the nail disappears, and the solution turns a pale yellow indicative of dissolved fe3+ ions. particles of solid pd metal also form. write a balanced equation that describes this reaction.

The recommended daily calcium intake for a 20-year-old is 1,000 milligrams (mg). one cup of milk contains 299 mg of calcium and one cup of juice contains 261 mg of calcium. which of the following inequalities represents the possible number of cups of milk m and cups of juice j a 20-year-old could drink in a day to meet or exceed the recommended daily calcium intake from these drinks alone?

Which statements are true for invasive species? 1. they always stabilize an ecosystem. 2. they’re always successful in adjusting to a new habitat. 3. they often compete with the native species for resources. 4. they have the ability to displace the native species. 5. they’re always pests.

Which of the following does the reading test of the sat ask you to do ?