Chemistry, 25.07.2019 16:00, zaiinab

What color would a phenolphthalein solution be at ph=11 ?

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Chemistry, 21.06.2019 22:30, stefaniethibodeaux

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

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Chemistry, 22.06.2019 05:00, happy121906

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Chemistry, 22.06.2019 10:30, Wookas8355

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space