Chemistry, 05.07.2019 22:00, alcantar28eduin
Will give 99 ! 1) keri has to identify a mysterious brown liquid in science class. she pours it through a filter, but the substance looks the same. then she heats the substance and collects the water that evaporates. the water droplets look the same as the original substance. keri concludes that since the substance cannot be separated it must be a compound. is keri correct? a) no because compounds can be separated physically. b) no because the substance could be an element. c) yes because water is a compound. d) yes because keri tried to separate it and all mixtures can be separated physically. 2) mrs. smith wrote down a chemical equation on the board and stated that mass is conserved in the reaction. what did she mean? a) there are equal numbers of atoms on both sides. b) there are more atoms on the reaction side. c) the number of atoms on each side changes. d) there are more atoms on the product side
Answers: 2
Chemistry, 21.06.2019 16:30, annan65
Jewelweed, a flowering plant, has seed pods that burst open when touched and forcefully eject their seeds. these structures are favorable because they a. can cause genetic changes to occur. b. prevent germination within the seed pod. c. aid in the dispersal of the species. d. attract insects that aid in pollination.
Answers: 3
Chemistry, 21.06.2019 20:30, AvreeanaS1379
The first element on the periodic table of elements is carbon. a. true b. false
Answers: 2
Chemistry, 22.06.2019 10:30, mv603177
Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic
Answers: 1
Will give 99 ! 1) keri has to identify a mysterious brown liquid in science class. she pours it thr...