Perform the following operation and express results in scientic notation (4.2 x 10-3) * (3.5 x 102)

147 x 10-5 in proper scientic notation

Express results in scientific notation  (6.2 x 106) + (3.4 x 105)

The solubility of BaSO, in water at 25 °C is measured to be 0.0023 Use this information to calculate Ke, for BaS04. L sp Round your answer to 2 significant digits. |x10

5) significant figures should be retained in the result of the following calculation: (354.0 + 21.01) x 107 (0.012 + 2.30) x 10² 1 O O

What is the median of the values 6.12, 7.00, 7.59, 4.11, 5.00, 5.02, and 9.56?

The answer to  6.626*10^-34 Js (7.40*10^6 m/s)(9.11*10^-28 g)  is  9.83*10^-17 g right? That's the answer I got but my digital homework says it's wrong, but like, all my math is checking out that it should be what I got?

How would you simplify the following expression?

What is the result of the following calculation to the correctnumber of significant figures?(6.266 − 6.261) ÷ 522.0 = a) 9.5785 × 10–6b) 9.579 × 10–6c) 9.58 × 10–6d) 9.6 × 10–6e) 1 × 10–5

Hexane (C6H14, density = 0.766 g/cm3), perfluoro-hexane (C6F14, density = 1.669 g/cm3), and water are immiscible liquids; that is, they do not dissolve in one another. You place 10 mL of each in a graduated cylinder, along with pieces of high-density polyethylene (HDPE, density = 0.97 g/cm3), polyvinyl chloride(PVC, density = 1.36 g/cm3), and Teflon (density = 2.3 g/cm3). None of these common plastics dissolves in these liquids. Describe what you expect to see.