A sample of an unknown substance contains 38. 43 g lead, 17. 83 g carbon, and 3. 74 g hydrogen. What is the empirical formula? (4 points) pbc4h10 pb2c8h15 pbc8h20 pb2c4h15.

Wats iqpow pls write 20 words for an answer

Which of these international trade concepts results in specialization and trade increases in total world output? a) absolute advantage b) balance of payments c) absolute advantage d) international tariffs

Which of the following is a presentation cue? a. crossing your arms b. mumbling c. repeating words d. whistling