Arent's Signature: Directions: Read the following item and choose the letter of the correct answer. Write your answers in your body
a. brain
d. bones
1. It is referred to as the river of life.
a. blood vessels b. heart
c. capillaries
2. It is considered as the functional unit of the nervous system.
b. neurons
c. muscles
3. It controls and coordinates the activities of the whole nervous system.
a. central nervous system b. sympathetic nervous system
c. nervous system d. brain
4. It is a system that controls other parts of the body.
a. nervous system b. circulatory system
c. digestive system
5. It is the primary organ of the central nervous system contained within the skull.
a. brain
b. axon
c. dendrites
d. cell body
d. respiratory system
Direct​

Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)

Acamcorder has a power rating of 17 watts. if the output voltage from its battery is 7 volts, what current does it use?units:

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?