Chemistry, 07.07.2019 06:50 write2lakenor7awj
Which of the following indicates a chemical change? question 7 options: a. an exploding firecracker b. a freezing ice cube c. wood breaking into splinters d. a wire conducting electricity
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Chemistry, 22.06.2019 08:00
Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next
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Chemistry, 22.06.2019 12:30
Avariable that is not being directly tested during an experiment should be
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Chemistry, 23.06.2019 02:00
Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.
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Which of the following indicates a chemical change? question 7 options: a. an exploding firecracke...
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