Na2so4+ba(no3)2—> complete and balance the following reaction

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.