Study the chemical reaction.

4Fe + 3O2 → 2Fe2O3

What is the mole ratio between Fe and O2?

Sigma is thinking about purchasing a new clam digger for $14,000. The expected net cash flows resulting from the digger are $9,000 in year 1, $7,000 in the 2nd year, $5,000 in the 3rd year, and $3,000 in the 4th year. Should Sigma purchase this digger if its cost of capital is 12%? a. Yes, NPV = $5,084 b. Yes, NPV = $16,605 c. Yes, NPV = $3,176 d. Yes, NPV = $19,084 Short Answer: Write a paragraph responding to 2 of the prompts below. Follow the CER (Claim-Evidence-Reasoning)formula. Write your answers in the space next to the stimulus. During a thunderstorm, an observer can see lightning before hearing its thunder. Why do we see lightning before we hear thunder?O Sound travels slower than lightO Sound needs a medium to travel through.O Sound cannot reflect off surfaces as easily as light.O Sound is not processed by the brain as fast as light. Please help me plz I need help What can the reader infer about the impact of the partnership between Matthew Boulton and James Watt on the development of the steam engine? PLS HELP I WILL GIVE BRAINLIST.Read this excerpt from the story B ruh Alligator and Br uh Deer from The People Could Fly."Here tis," says Br uh Alligator. "When you take to the river, I'll take e the beagle what chasin you. Me for you, and you for me, and both us for one another."What theme is suggested by this excerpt?If you help a friend, your friend will help you.Life is full of da ngers that you must face.If you try to avoid dan ger, dan ger will find you.You must forgive your friends when they harm you. 2multiplied by 6y + 3y divided by 3 The product of 5 and x is at least 25 A rocket burns fuel as it shoots into the sky. What happens to the mass and volume of the rocket? use what you know about zeros of a function and end behavior of a graph to choose the graph that matches the function f(x)=(x+3)(x+2)(x-1) Urgent please help.. PLEASE HELP ME WITH THIS QUESTION! how did the actions of Tiberius affect rome What is the solution to this system ofequations?S 2x 3y = -4-6x + 9y = 12 Which internet service type forced users to choose between using the phone and using the internet What's 100 divided by 42 Buddhism is the middle way of what two things? A) hope and peace B) peace and love C) love and sharing D) compassion and wisdom The graph shows a proportional relationship between the number of workers and weekly cost, in dollars, for a company in its first year. The following year, the company spends $7,200 per 12 employees. Did the rate increase or decrease the following year? In which intervals is the function increasing?(5)(3)(4)(2)(1)A Interval 1B. Interval 2OC. Interval 3O D. Interval 4E. Interval 5 09 Multiple Choice Look at the organisms below. What do these organisms have in common? 1.skeletal structure 2.constant body temperature3.presence of spinal cord 4.pattern of symmetry