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during an investigation, a scientist numbers three beakers. next, she pours 150 ml of liquid into each
beaker. each liquid is different.
then, the scientist adds 5 grams of white solid baking soda (nahco: ) to each beaker and stirs. she
observes the results.
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in which of the beakers does the scientist observe clear evidence of a chemical reaction?
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a beaker 1 only
b. beaker 2 only
c. beaker 3 only
d. beakers 2 and 3
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Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

What happens when the temperature of a solution increases?

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic