Read the following hypothesis about why a chicken bone becomes bendy after being soaked in vinegar: the bone can bend because the acid in the vinegar has removed the calcium that made it hard. what evidence would support this hypothesis? a. observing that a bone placed in a freezer becomes more rigid b. observing that a bone placed in a beaker of acid becomes bendy c. observing that a bone placed in a beaker of water becomes bendy d. observing that a bone placed in a mixture of baking soda and water becomes more rigid

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

i think slash and

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.