Trini adds 10g of baking soda to 100g of vinegar. the mixture begins to bubble. when the bubbling stops, trini finds the mass of the resulting mixture. she determines that the mass is 105g. how do you know that a chemical change has occurred?

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca

Select all that apply. careful listening skills include: refraining from interrupting the speaker taking quality notes making an effort to understand maintaining eye contact with the speaker