Name: W
Date:
ou Answer the following questions.
W
2. A pure substance made of two or more elements chemically
combined is a(n)
UNDS
a. element
b. compound
c. mixture

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?