Chemistry, 17.08.2021 16:10 dreamdancekay
D. Which statement below describes what happens in a chemical change but not in a
physical change? Tick the correct box.
The product is a solid.
The change only happens at a high
temperature.
The atoms have combined in a different
way to make a new substance.
The types of atoms at the start are the
same as in the end product.
Answers: 2
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Complete the sentence. the lower the hydrogen ion concentration, the the ph. higher lower closer to 7 closer to 0
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Write a hypothesis that answers the lesson question, βwhile observing a chemical reaction, how can you tell which reactant is limiting? β hypothesis: if a substance is the limiting reactant, then . . because . .
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22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na,so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g
Answers: 1
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What is the independent variable in this investigation? mass volume sample number substance density
Answers: 3
D. Which statement below describes what happens in a chemical change but not in a
physical change?...
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