Ajapanese sword maker heats a mixture of iron and charcoal. he repeatedly heats, folds, and flattens the mixture more than a thousand times.
what is he doing?

a. he is making a metallic bond and adding impurities.
b. he is making an ionic compound and removing impurities.
c. he is making an alloy and removing impurities.
d. he is making an iron ore and adding impurities.

The goal of this experiment was to answer the question "what is the effect of a gas' temperature on its volume? " you formulated the hypothesis below. hypothesis: if a fixed amount of gas is heated, then the volume will increase because the heat will cause the molecules of gas to move faster and further apart. to test this hypothesis, you changed the of the gas between 0 and 100°c (273 and 373 k) and calculated the resulting of the gas.