Какой должна быть масса образца серебра чтобы в нём содержалось столько же атомов сколько их находиться в образце меди массой 160 г

Умоляю помогите срочно.

Choose the appropriate verb forms to make the sentences complete.1.If you (read/will read) __________ the sentence loudly, everybody _____________ (hear/will hear) you. 2. We (were writing/wrote) a test __________ when the headmistress entered the classroom. 3. Bob (is painting/paints) __________ unusual pictures but his latest is very traditional. 4. Barbara doesn't know what mark she (gets/will get) ______________ for the test. 5 Jane is sure that her parents (are/will be) ___________ proud of her when she becomes a university student. 7. Pupils usually (wear/are wearing) ____________ uniforms at school.