INPUT ARTICLE: Article: The average atomic mass tells you the relationship between mass and number of atoms in a typical sample of the element. This is useful in chemistry laboratories because it is almost impossible to count the number of atoms directly, but easy to measure mass. For example, you can weigh a sample of silver and predict that each 107.8677 amu of mass contains one silver atom. . Atomic mass units are very small, so chemists typically weigh samples in grams instead. Fortunately, these concepts are defined to make the conversion as easy as possible. Just multiply the average atomic mass by 1 g / mol (the molar mass constant) to get an answer in g / mol instead. For example, 107.8677 grams of silver contain one mole of silver atoms on average. Since a molecule is just a collection of atoms, you can add the masses of the atoms together to find the mass of the molecule. If you use the average atomic masses (instead of the mass of a specific isotope), the answer is the average mass of the molecule as found in a naturally occurring sample. Here's an example:  A molecule of water has the chemical formula H2O, so it contains two hydrogen (H) atoms and one oxygen (O) atom. Hydrogen has an average atomic mass of 1.00794 amu. Oxygen atoms have an average mass of 15.9994 amu. The average mass of a molecule of H2O equals (1.00794)(2) + 15.9994 = 18.01528 amu, equivalent to 18.01528 g/mol.

SUMMARY: Convert mass to number of atoms. Convert to molar mass Find average molecular mass.

In one sentence, describe what the following article is about: Two to four hangers are enough to make wings, depending on how many you want. Bend two hangers in the shapes of wings, then lay them on top of each other to see if they are even. Adjust as necessary. These wings should appear rounded, but you can create two additional square wings to attach to the bottom like Tinkerbell from the Disney movie Peter Pan. Place the wings on a table, facing the hooks towards one another. These ends can be cut off so you can twist the resulting four ends together, but you can combine the hooks together by using a little strength to twist them around each other. Make sure the twists are secure with no sharp ends sticking out. To avoid the twisted part of the hangers from jabbing into the wearer, pad the center of the wings. To do this, you can apply any sort of felt or fabric you have laying around the house. Wrap the fabric around the metal and then tape it secure. Cut the legs off a pair of tights. Take one of the legs and put a wing inside of it. Do the same with the other leg of the tights and repeat the process if you have additional wings. The loose fabric should be in the center of the wings. Wrap the excess fabric around the center of the wings. Tie it into a knot, then trim it so it looks neat. If you can, match the tights to the base color you want the wings to be. You can also spray paint the tights when the wings are finished to achieve flashier colors. Cut the legs off a second pair of tights. Take one of the legs and wrap it around one end of the center part where the wings meet. Tie the ends of the fabric into a loop for your arms. Repeat this process with the other leg on the other side. The wings can be customized as you please. One way to do this is to add a flower or puff from a craft store by sewing it or attaching it with a hot glue gun onto the knot where the wings meet. The knot may also look good in spray painted duct tape. Children can help with decorating by adding material such as plastic jewels or glitter.
Summary: Bend wire hangers. Join the hanger hooks. Cover the metal twist. Cover with tights. Cut a pair of tights for arm holders. Decorate.

INPUT ARTICLE: Article: Lime juice is most commonly used in cuisine from Mexico, Latin America, Hawaii, and other island countries. You can search for recipes from these regions to make use of your lime juice, or you could add a splash of lime juice in toward the end of your cooking to flavor otherwise bland dishes like soups or pastas. Cilantro is an especially common herb to use with lime juice. Coconut is another worthwhile flavor to match with lime juice and brings a nice node of sweetness to the sourness of lime. Rice absorbs flavor as it cooks, so adding 1 or 2 tablespoons (15 to 30 milliliters) of lime juice can give it a tangy, exotic flavor. The citrus in lime also makes rice fluffier, but the effect is not as pronounced as it is when using a stronger citrus like lemon juice. Alternatively, you can also create coconut lime rice by substituting half or all of the water for coconut milk and adding 1 to 2 tablespoons (15 to 30 milliliters) of lime juice. This rice will be heavy rather than fluffy due to the effect of the coconut milk. Key limes are smaller than other lime varieties and have a sharper, more pronounced sourness that creates an interesting contrast in otherwise sweet desserts. Key lime pie is the most common lime baked good, but you can also create cakes, cheesecakes, ice cream, and more using the juice of key limes. While not as commonly used as lemon juice, lime juice can add a refreshing splash of citrus to a variety of drinks. One or two teaspoons of lime juice works especially well in water, but you can also try adding a splash to a lemon-lime drink or other soda. Alternatively, you can use lime juice to create limeade. Lime juice can give an old sauce recipe new dimension. Try adding 1 or 2 teaspoons (5 to 10 milliliters) of lime juice to a standard barbecue or marinara sauce. Stir the lime juice in and warm the sauce so that the flavors can blend. A simple vinaigrette dressing combines olive oil and vinegar in a ratio of 3 to 1. For an exotic twist, you can skip the vinegar and add lime juice in the same proportions. Mix in a little honey to cut the sourness of the lime juice, or add some cilantro, ginger, and salt to enhance the flavor. You can use this dressing over cold cooked pasta, loose leaf salads, and cucumber salads. Authentic guacamole tends to use lime juice, since the flavor of the avocado pulp is enhanced by the tanginess of lime. Other ingredients, like cilantro, salt, and garlic, are added in and blended together to create a slightly chunky dip.

SUMMARY:
Add a dash of lime juice to a bland recipe to give it an exotic Latin or island-style taste. Pair lime juice with complementary flavors. Cook rice with lime juice. Make a key lime dessert. Flavor a beverage with lime juice. Add lime juice to your favorite sauce. Create a lime juice dressing. Make a guacamole dip.