Mutilpy choice(extra points)
in a controlled scientific experiment, a
a. alters one independent variable and observes the effects on other independent variables.
b. alters the independent variable and observes the effects on the dependent variable.
c. alters one dependent variable and observes the effects on other dependent variables. d. alters the dependent variable and observes the effects on the independent variable.

B. alters the independent variable and observes the effects on the dependent variable.

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).

> 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.