What is the mantles approximate depth range

Iknow #2 is d. i just need to know why

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles