Similar to carbon, there are multiple stable isotopes of silicon, two of which are 28Si and 30Si. An organism that utilizes silicon instead of carbon to build its biomass would need to consume materials with silicon, such as clay, as food and would likely respire quartz (SiO2) as a by-product. If the enzymes for this organism operated similar to enzymes in organisms on Earth, which of the following would you expect to observe? a. The residual clay would be enriched in 28_Si while the quartz would be enriched in 30_Si
b. Both the residual clay and the quartz would be enriched in 30_Si
c. The residual clay would be enriched in 30_Si while the quartz would be enriched in 28_Si
d. Both the residual clay and the quartz would be enriched in 28_Si

Which is a character of nuclear fusion but not nuclear fission

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.