Chemistry, 18.09.2019 09:00 bellabae8390
You find a penny with a mass of 2.50 g and a volume of 0.339 cm3. is this penny pure copper? (the density of copper is 8.96 g/cm3)
Answers: 1
Chemistry, 22.06.2019 11:00
When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.
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Chemistry, 22.06.2019 11:00
Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.
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Chemistry, 22.06.2019 13:30
What produces wave a)sound b) heats c)transfer of energy d)vibrations
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You find a penny with a mass of 2.50 g and a volume of 0.339 cm3. is this penny pure copper? (the d...
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