Answer:
the radioactive half-life of an atom can depend on how it is bonded to other atoms. by changing the neighboring atoms that are bonded to a radioactive isotope, we can change its half-life.
Explanation:
A mixture has lots of different elements that are not necessarily bonded to each other, like sea water has lots of dirt, animals, and plant parts in it. Compared to a solution (strictly salt and water, which bond and ionize with each other).
Neutralize it with a alkaline
Answer:
= 5.26 × 10^-7 M
Explanation:
We know that;
[H3O+][OH-] = 1 x 10^-14
Therefore;
Given; OH− concentration = 1.9x10^−8 M
Then; [H3O+] = (1 x 10^-14)/[OH-]
= (1 x 10^-14)/(1.9x10^−8)
= 5.26 × 10^-7 M
Answer:
D. 77.5.
Explanation:
- From the balanced equation: <em>CaCl₂ + 2AgNO₃ → 2AgCl + Ca(NO₃)₂</em>
- It is clear that 1.0 mole of CaCl₂ reacts with 2.0 moles of AgNO₃ to produce 2.0 moles of AgCl and 1.0 mole of Ca(NO₃)₂.
- The no. of moles of reacted (30.0 g) CaCl₂ = mass / molar mass = (30.0 g) / (110.98 g/mol) = 0.27 mol.
<em><u>Using cross multiplication:</u></em>
1.0 mole of CaCl₂ produces → 2.0 moles of AgCl, from the stichiometry.
0.27 mol of CaCl₂ produces → ??? moles of AgCl.
∴ The no. of moles of the produced AgCl = (2.0 mol)(0.27 mol) / (1.0 mol) = 0.54 mol.
∴ The mass of the produced AgCl = no. of moles x molar mass = (0.54 mol)(143.32 g/mol) = 77.48 g ≅ 77.5 g.
