You learned that different types of forces act on objects directly and indirectly you also learn what happens when forces are balanced and unbalanced examine the diagram below showing forces acting on a box. 1. Explain how you calculate the net force in any direction on the box.
2. Suppose an upward force of 15 N is added to the box what will be the net vertical force on the box.
3. What force could be applied to the box to make the net force in the horizontal direction zero? explain.
4. Suppose a force of 25 N to the right is added to the box. what will be the net force to the right?

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

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.