Answer:
See explanation
Explanation:
Calcium is divalent. This means that it donates two electrons during ionic bond formation. Since chlorine atom can only accept one electron during ionic bond formation, two chlorine atoms must accept the two electrons donated by calcium.
For this purpose, each time CaCl2 is formed, there must be two chlorine atoms for each calcium atom.
PV=nRT
Here
P1/T1= P2 / T2
1 torr=133 pascal
600 *133 /215 = 750 *133 / t2
T2= 268.75 K
Answer:
- Daniel- Earth and Space
- Sanya- Chemistry
Explanation:
Daniel's study field is associated with the '<u>Earth and Space</u>' as he is attempting to explore how the frequency of tropical storms(in the atmosphere) and coastal erosion(relation with land and ocean) are interconnected to each other. He studies how the two are associated and affect life on the planet.
While Sanya's field of study would be '<u>Chemistry</u>' as she aims to study the composition and constitution of substances and the changes that they undergo as a consequence of alterations in the constitution of their molecules('whether the discharge from industrial plants has any impact on the pH concentration of freshwater swamps in the surrounding area').
Answer:
Calcium + Oxygen = Calcium Oxide
Explanation:
Calcium basics: -positively charged ion (cation) -99% in bones and teeth, 1% in extracellular fluid. -important for bone and tooth formation, normal cell function, and neural transmission.
Oxygen, a colourless, odourless, tasteless gas essential to living organisms. It will support life. It is noncombustible, but will actively support the burning of combustible
Symbol: O
Atomic mass: 15.999 u
Atomic number: 8
Electron configuration: [He] 2s²2p⁴
Electrons per shell: 2, 6
Melting point: -218.8 °C
Calcium reacts with oxygen to form calcium oxide. The chemical equation for this reaction is Ca + O2 → CaO.