My questions are not coming up in my browser. I am using chrome

You'll need to check out your console in your developer tools to see what errors you're getting in Javascript, it's invaluable when figuring out why things aren't working.

In quiz_ui.js, you're missing two last curly braces at the very end, one for displayProgress: function() and another for var QuizUI.

See here -

displayProgress: function() {
    var currentQuestionNumber = quiz.currentQuestionIndex + 1;
    this.populateIdWithHTML("progress", "Question " + currentQuestionNumber + " of " +
quiz.question.length);
  }
}

In app.js you broke into a newline in your questions array, so it thinks the rest of that object is a string.

See here -

var questions = [
  new Question("Who was the first President of the United States?", [ "George Washington", "Thomas Jefferson" ], "George Washington"),
      new Question("What is the answer to the Ultimate Question of Life, the Universe, and Everything?", ["Pi","42"], "42")
];

I think that was it, it should run if you fix those two things. I was only able to find those errors by reading the console and checking the lines it gave, so be sure to check it out in the future. :)