Which of these hypotheses cannot be tested? O A. Sedimentary rock layers always contain fossils. O B. Dinosaurs became extinct millions of years ago. C. Bones are more likely to become fossils than soft tissue like skin. OD. If dinosaurs were alive today, people could train them to do work.​

How many atoms are there in 5.70 mol of mg

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided

How many moles of sulfuric acid (h2so4) are needed to react completely with 6.8 moles of lithium hydroxide (lioh)? 2lioh + h2so4 → li2so4 + 2h2o a. 3.4 mol h2so4b. 6.8 mol h2so4 c. 10.2 mol h2so4 d. 13.6 mol h2so4