Ben and Joey were making some sweet tea for their mother. They were having a hard time getting the sugar to dissolve in the water. "Let's do an experiment to see how we can make the sugar dissolve faster!"

What would be a testable question the boys could use for their investigation?A)
How does stirring help sugar dissolve in water?

B)
How much sugar will dissolve in a glass of water?

C)
What will help us dissolve sugar in a glass of water?

D)
The more you stir or shake, the faster the sugar dissolves

HI

Explanation:

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.