Which of the changes are chemical changes?
a. sugar is dissolved in water.
b. a warm...
Which of the changes are chemical changes?
a. sugar is dissolved in water.
b. a warm soda bottle fizzes when opened.
c. the copper roof turns green over time.
d. baking soda is dissolved in vinegar and bubbles form.
e. a fog appears on the windshield in cold weather.
Answers: 3
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If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood
Answers: 2
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Chris is about to do an experiment to measure the density of water at several temperatures. his teacher has him prepare and sign a safety contract before beginning the experiment. which term is mostlikely part of the safety contract
Answers: 3
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