Which statements describe chemical changes? Check all that apply.
a. The after-rain smell is produced by an interaction between rain and the oils released by plants.
b. A homemade volcano can be created by combining baking soda and vinegar. When it erupts, carbon dioxide gas is released.
c. Sheep are sheared for their wool. The wool is cleaned and twisted into yarn. The yarn is dyed and used to knit clothing.
d. The Statue of Liberty has turned green over time due to the reaction of copper with carbon dioxide and water.
e. Mosaic art is created by smashing colored glass tiles and rearranging them to form a picture or design.
Answers: 2
Chemistry, 21.06.2019 15:50
The density of glycerin is 1.26grams/centimeter cubed . how many is this? use the conversion rates of and . express your answer to the correct number of significant figures.
Answers: 1
Chemistry, 22.06.2019 00:00
What stress will shift the following equilibrium system to the left? n2(g) + 3h2(g) ⇌ 2nh3(g) adding more n2(g) adding more nh3(g) increasing the pressure of the system reducing the volume of the container
Answers: 1
Chemistry, 22.06.2019 21:30
Plzz a sample of table sugar (sucrose, c12h22o11) has a mass of 7.801 g. â—Ź a) calculate the number of moles of c12h22o11 in the sample b) calculate the number of moles of each element in c12h22o11 (number of moles of c, number of moles of h & number of moles of o) in the sample. (use your answer from part a as your starting point.) show your work and highlight your final answer. calculate the number of atoms of each element in c12h22o11 (number of atoms of c, number of atoms of h & number of atoms of o) in the sample. (use your answers from part b as your starting for each element.) show your work and highlight your final answer.
Answers: 1
Chemistry, 22.06.2019 23:40
The kw for water at 0 °c is 0.12× 10–14 m2. calculate the ph of a neutral aqueous solution at 0 °c.
Answers: 2
Which statements describe chemical changes? Check all that apply.
a. The after-rain smell is produc...
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