Answer:
27.7 g
Explanation:
To solve this problem we use the definition of <em>molarity</em>:
From the problem we're given M = 2.5 M and volume = 0.100 L. We use the above formula and <u>calculate the required moles of calcium chloride</u> (CaCl₂):
Finally we use the<em> molecular weight</em> of calcium chloride to <u>calculate the required mass</u>:
- 0.25 moles CaCl₂ * 110.98 g/mol = 27.745 g CaCl₂
Rounding to the nearest tenth of a gram the answer is 27.7 g.
Answer:
chemical change occur when a substance combines with another to form a new substance.
Explanation:
hope this helps ;)
Answer:
Al, Zn, Fe, Sn, Pb.
Explanation:
The arrangement can be done using the infomation on electrochemical series of metals.
The electrochemical series is built up by arranging various metals in order of their standard electrode potentials (or reactivity). The most negative E° values are placed at the top of the electrochemical series, and the most positive at the bottom. some of the metals are arranged as follws; K, Na, Ca, Mg, Al, Zn, Fe, Sn, Pb, H, Cu, Hg, Ag, Au (decreasing reactivity)
One can use the following to remember the arrangement: king Nathan Can Manage All Zone Freely Since Probably He Can Handle All Ages.
Answer:
206 mL
Explanation:
In the annexed picture you can see your same question, just in another format.
First we <u>calculate the total moles of CuF₂ that are required in the working solution</u>:
1967 μM ⇒ 1967 / 10⁶ = 1.967 x10⁻³M
1.967 x10⁻³M * 0.275 L = 5.409x10⁻⁴ mol
Now we divide those moles by the concentration of the stock solution, to <u>calculate the volume</u>:
5.409x10⁻⁴ mol ⇒ 5.409x10⁻⁴ * 1000 = 0.5409 mmol
0.5409 mmol ÷ (2.63 mmol/L) = 0.206 L
0.206 L ⇒ 0.206 * 1000 = 206 mL
Covalent bonds consist of pairs of electrons shared by two atoms, and bind the atoms in a fixed orientation.
