Answer:
Molarity of stock HCl solution is 0.89 M
Explanation:
The given problem can be solved using laws of dilution.
According to laws of dilution-
Where, and are initial and final concentration of a solution
and are initial and final volume of a solution
Here, , and
So, = = 0.89 M
Hence, molarity of stock HCl solution is 0.89 M
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.
Im sorry really dont know the answer
Answer:
After 190 s the concentration of X will be 0.0396 M
Explanation:
Where;
Xt is the concentration of X at a time t
X₀ is the initial concentration of X
k is rate constant = 1.7×10⁻² s⁻¹
t is time = 190s
ln(Xt/X₀) = -( 1.7×10⁻²)t
ln(Xt/1.0) = -( 1.7×10⁻²)190
ln(Xt/1.0) = -3.23
Xt = 0.0396 M
Therefore, after 190 s the concentration of X will be 0.0396 M
Answer:
Here:
Explanation:
To familiarize students with experimental apparatus, the scientific method, and methods of data analysis so that they will have some idea of the inductive process by which the ideas were originated. To teach how to make careful experimental observations and how to think about and draw conclusions from such data.