please qive me questions on Mental health concerns on during pandemic like example were you or anyone you know was affected by the global crisis mentally? based on yes or no 15 questions maximum​

Which law represents a balanced chemical equation?

Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!

What is the compliment dna strand to the following sequence: ttgactaggcta