subject
Physics, 11.07.2019 14:00 rebtav

Question 14 unsaved a student says that all pure substances are elements. do you agree? why or why not? question 14 options: i disagree. all pure substances are also mixtures. i disagree. elements are not pure substances. all pure substances include only molecules and compounds, which are more complex. i agree. pure substances include only single atoms made of one element. i disagree. elements form all pure substances, but some pure substances include elements bonded together to form molecules and compounds.

ansver
Answers: 1

Another question on Physics

question
Physics, 22.06.2019 07:50
Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1
Answers: 1
question
Physics, 22.06.2019 19:10
Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to
Answers: 3
question
Physics, 23.06.2019 02:00
Ice at 0.0∘c has a density of 917 kg/m3. a 3.00 cm3 ice cube is gently released inside a small container filled with oil and is observed to be neutrally buoyant. what is the density of the oil?
Answers: 2
question
Physics, 23.06.2019 02:30
What instrument is used to measure liquid volume?
Answers: 1
You know the right answer?
Question 14 unsaved a student says that all pure substances are elements. do you agree? why or why...
Questions
question
Mathematics, 06.05.2020 17:59
question
Mathematics, 06.05.2020 17:59
question
Mathematics, 06.05.2020 17:59
question
Mathematics, 06.05.2020 18:00
question
Biology, 06.05.2020 18:00
question
Mathematics, 06.05.2020 18:00