91Ó°ÊÓ

Gold has a density of \(19.3 \mathrm{~g} / \mathrm{mL}\). Suppose you have \(100.0\) glonkins of gold. What volume in liters will the gold occupy? Here are some conversion factors to help you: \(0.911\) ounce per glonkin and \(28.35 \mathrm{~g}\) per ounce. Use unit analysis to calculate your answer, and show your work. Treat both conversion factors as exact.

The density of a certain liquid is \(1.15 \mathrm{~g} / \mathrm{mL}\). What mass in grams of the liquid is needed to fill a \(50.00\) -mL container? Do this problem by the method of algebraic manipulation, beginning with the equation density \(=\) mass/volume and showing all steps.

How much heat energy is 1 cal? Give your answer in terms of changing the temperature of water.

Convert: (a) \(4.50\) Cal to calories (b) \(600.0\) Cal to kilojoules (c) \(1.000 \mathrm{~J}\) to calories (d) \(50.0\) Cal to joules

A \(100.0\) -g block of iron and a \(100.0\) -g block of aluminum are both initially at \(25.0^{\circ} \mathrm{C}\). Both are then warmed to \(100.0^{\circ} \mathrm{C}\). Does one block require more heat energy than the other to reach \(100.0{ }^{\circ} \mathrm{C}\) ? If so, how much more?

Why is it necessary for a calorimeter to be insulated?

A \(2.50-g\) piece of wood is burned in a calorimeter that contains \(0.200 \mathrm{~kg}\) of water. The burning causes the water temperature to increase from \(22.1^{\circ} \mathrm{C}\) to \(28.7^{\circ} \mathrm{C}\). How much heat energy is released in joules? What is the energy content of the wood in joules per gram of wood?

How many joules of heat energy would it take to raise the temperature of \(2.00\) pounds of iron from \(30.0^{\circ} \mathrm{C}\) to \(90.0^{\circ} \mathrm{C} ?[453.6 \mathrm{~g}=1\) pound \(]\)

The SI unit of speed is meters per second. In the United States, speed is often expressed in miles per hour. If a car is traveling \(60.0\) miles \(/ \mathrm{h}\), what is its speed in meters per second? \([1\) mile \(=1.61 \mathrm{~km}]\)

In the United States, car fuel efficiency is expressed in miles per gallon of gasoline. However, fuel efficiency can also be expressed in kilometers per liter of gasoline. If the fuel efficiency of a car is \(11.0 \mathrm{~km} / \mathrm{L}\), what is its fuel efficiency in miles per gallon? \([1\) mile \(=1.61 \mathrm{~km}, 1\) gallon \(=3.79 \mathrm{~L}]\)