1. If a question states "The patching material costs NASA $306/in2 …", the conversion factor in this statement is: Recognizing — Equation statement: $306 =

$306 = Cost of 1 square inch of the patching material in question.

$306 = 1 in²

Explanation:

The conversion factor is am expression that is used to prove the equivalence of some quantities with different units.

The conversion factor basically converts from one quantity to another.

For this question, the conversion factor given for the patching material is $306/in².

This means that the patching material costs $306 for every square inch, the equation for the conversion is thus

$306 = 1 in² of the patching material.

Hope this Helps!!!

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

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.