Which statements about scientific explanations are true? I. Scientific explanations must prove that a hypothesis is true. II. Scientific explanations should be based on evidence or data. III. Scientific explanations must have logical and consistent arguments. IV. Scientific explanations should use scientific principles, models, and theories. A. I, II, III and IV B. I, II and III only C. II, III and IV only D. II and III only
Answers: 3
Chemistry, 22.06.2019 02:10
When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)
Answers: 3
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.
Answers: 1
Chemistry, 22.06.2019 16:30
How many moles of sulfuric acid (h2so4) are needed to react completely with 6.8 moles of lithium hydroxide (lioh)? 2lioh + h2so4 → li2so4 + 2h2o a. 3.4 mol h2so4b. 6.8 mol h2so4 c. 10.2 mol h2so4 d. 13.6 mol h2so4
Answers: 3
Chemistry, 23.06.2019 01:00
Which of the following is a physical change? a.burning a piece of wood b.sawing a piece of wood in half c.rust forming on an iron fence d.a copper roof changing color from orange to green
Answers: 1
Which statements about scientific explanations are true? I. Scientific explanations must prove that...
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